CN108220548B - A kind of processing technology of high-strength steel strip - Google Patents
A kind of processing technology of high-strength steel strip Download PDFInfo
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- CN108220548B CN108220548B CN201810020573.9A CN201810020573A CN108220548B CN 108220548 B CN108220548 B CN 108220548B CN 201810020573 A CN201810020573 A CN 201810020573A CN 108220548 B CN108220548 B CN 108220548B
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
- C21D8/0273—Final recrystallisation annealing
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
- C21D1/32—Soft annealing, e.g. spheroidising
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B15/0007—Cutting or shearing the product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/02—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of sheets
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/08—Iron or steel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B15/0007—Cutting or shearing the product
- B21B2015/0021—Cutting or shearing the product in the rolling direction
Abstract
The present invention relates to a kind of processing technology of high-strength steel strip, include the following steps: to choose the hot-rolled coil that the trade mark is SCM435；It will carry out first time longitudinal shearing slitting；The hot-rolled coil of first time longitudinal shearing slitting is subjected to soft annealing by annealing furnace/ammonia destruction furnace, soft annealing roll bending is made；Soft annealing roll bending is subjected to pickling, and pickling roll bending is made；Pickling roll bending is rolled, and rolling roll bending is made；Rolling roll bending is passed through into annealing furnace/ammonia destruction furnace progress spheroidizing, obtained spheroidizing roll bending；Spheroidizing roll bending is subjected to finish rolling, and finish rolling roll bending is made；Finish rolling roll bending is subjected to second of longitudinal shearing slitting by small banding machine, and slitting roll bending is made；It is packed and stored, packing packaging is carried out to slitting roll bending using baling press.The beneficial effects of the present invention are: can stabilized product quality, raise labour productivity.
Description
Technical field
The present invention relates to strip production and processing technical field more particularly to a kind of processing technologys of high-strength steel strip.
Background technique
It is well known that strip is to adapt to a kind of narrow and long steel plate that different industrial departments are needed and produced.It is wide
Degree is generally within 300mm, but with economic development, and there is no limit for width.Strip is supplied in rolls, high with dimensional accuracy,
Surface quality is good, it is easy to process, save the advantages that material, be widely used in production welded still pipe, make the blank of cold-rolled forming section, manufacture
Cycle frame, wheel rim, clip, washer, spring leaf, saw blade and blade, the fields such as the sole and steel toes of Labor protection shoes.
It is influenced by the processing technology of current strip, the strip quality produced is not sufficiently stable, in production process
In easily there is rejected product, cause entire production efficiency relatively low.
Summary of the invention
Technical problem to be solved by the invention is to provide it is a kind of being capable of stabilized product quality, the band raised labour productivity
The processing technology of steel.
The technical scheme to solve the above technical problems is that a kind of processing technology of high-strength steel strip, including such as
Lower step:
Step 1: preparing raw material, choosing the hot-rolled coil that the trade mark is SCM435；
Step 2: first time longitudinal shearing slitting, the hot-rolled coil got ready in step 1 is transported to first by row device for hoisting
First time longitudinal shearing slitting is carried out on big splitting production line；
Step 3: soft annealing, by complete first time longitudinal shearing slitting hot-rolled coil annealing is transported to by row device for hoisting
In furnace, annealing furnace uses ammonia destruction furnace, is warming up to 400 DEG C at full speed first, by annealing furnace, and keep the temperature 1h after being warming up to 400 DEG C
To 5h, secondly, annealing furnace 400 DEG C at a temperature of heat preservation 1h to 5h after, annealing furnace is warming up to 600 DEG C in 1h to 6h, and
After being warming up to 600 DEG C keep the temperature 0.5h to 4h, again, annealing furnace 600 DEG C at a temperature of heat preservation 0.5h to 4h after, by annealing furnace
It is warming up to 690 DEG C in 1h to 5h, and keeps the temperature 0.5h to 4h, the 4th, temperature of the annealing furnace at 690 DEG C after being warming up to 690 DEG C
After lower heat preservation 0.5h to 4h, annealing furnace is warming up to 710 DEG C to 730 DEG C in 1h to 5h, and be warming up to 710 DEG C to 730 DEG C
Afterwards keep the temperature 10h to 18h, the 5th, annealing furnace 710 DEG C to 730 DEG C at a temperature of heat preservation 10h to 18h after, using furnace cooling
Mode is by the cooling 4h to 8h of annealing furnace, and the 6th, after cooling down 4h to 8h to annealing furnace using furnace cooling by the way of, to annealing furnace
Change that cover is air-cooled, and the temperature of annealing furnace is down to 280 DEG C, the 7th, after the temperature of annealing furnace is down to 280 DEG C, using water cooling
Mode, the temperature of annealing furnace is down to 80 DEG C by 280 DEG C, it is last, come out of the stove, soft annealing roll bending is made；
Step 4: pickling, the soft annealing roll bending that soft annealing obtains is transported to pickling lines by row device for hoisting
Upper carry out pickling, and pickling roll bending is made；
Step 5: rolling, the pickling roll bending obtained after pickling be transported on production line of rolling mill by row device for hoisting carrying out
Rolling, and rolling roll bending is made；
Step 6: spheroidizing, the rolling roll bending obtained after rolling be transported in annealing furnace by row device for hoisting carrying out
Spheroidizing, annealing furnace use ammonia destruction furnace, are warming up to 400 DEG C at full speed first, by annealing furnace, and protect after being warming up to 400 DEG C
Warm 1h to 5h, secondly, annealing furnace 400 DEG C at a temperature of heat preservation 1h to 5h after, annealing furnace is warming up to 640 in 1h to 6h
DEG C, and after being warming up to 640 DEG C keep the temperature 0.5h to 4h, again, annealing furnace 640 DEG C at a temperature of heat preservation 0.5h to 4h after, will
Annealing furnace is warming up to 730 DEG C in 1h to 5h, and 0.5h to 4h is kept the temperature after being warming up to 730 DEG C, and the 4th, annealing furnace is at 730 DEG C
At a temperature of keep the temperature 0.5h to 4h after, annealing furnace is warming up to 740 DEG C to 760 DEG C in 0.5h to 2h, and be warming up to 740 DEG C
After to 760 DEG C keep the temperature 10h to 16h, the 5th, annealing furnace 740 DEG C to 760 DEG C at a temperature of heat preservation 10h to 16h after, using with
The temperature of annealing furnace is down to 550 DEG C to 600 DEG C by the cooling mode of furnace, the 6th, by the way of furnace cooling by annealing furnace
Temperature be down to 550 DEG C to 600 DEG C after, change to annealing furnace that cover is air-cooled, and the temperature of annealing furnace is down to 280 DEG C, the 7th,
After the temperature of annealing furnace is down to 280 DEG C, by the way of water cooling, the temperature of annealing furnace is down to 80 DEG C by 280 DEG C, finally, is gone out
Spheroidizing roll bending is made in furnace；
Step 7: finish rolling, by the spheroidizing roll bending obtained after spheroidizing by row device for hoisting be transported to milling train production
Finish rolling is carried out on line, and finish rolling roll bending is made；
Step 8: second of longitudinal shearing slitting, the finish rolling roll bending that finish rolling obtains is transported to small banding machine by row device for hoisting
Second of longitudinal shearing slitting of upper progress, and slitting roll bending is made；
Step 9: being packed and stored, being packaged using baling press to slitting roll bending obtained after second of longitudinal shearing slitting
Packaging.
The beneficial effects of the present invention are: by when carrying out soft annealing to hot-rolled coil, by entire soft annealing process
Several stages are divided into, and effectively control heating-up time, soaking time and the temperature in each stage in each stage, and
When carrying out spheroidizing to rolling roll bending, entire spheroidizing process is divided into several stages, and is effectively controlled each
Heating-up time, soaking time and the temperature in each stage in a stage, so that the stable product quality produced, product
Qualification rate gets a promotion, to further improve labor productivity.
Based on the above technical solution, the present invention can also be improved as follows.
Further, in the step 3, in soft annealing, annealing furnace is warming up to 400 DEG C at full speed, and be warming up to
1.5h to 3h is kept the temperature after 400 DEG C；Annealing furnace 400 DEG C at a temperature of heat preservation 1.5h to 3h after, annealing furnace is risen in 2h to 4h
Temperature keeps the temperature 0.6h to 2h to 600 DEG C after being warming up to 600 DEG C；Annealing furnace 600 DEG C at a temperature of heat preservation 0.6h to 2h after,
Annealing furnace is warming up to 690 DEG C in 1.5h to 3h, and keeps the temperature 0.6h to 2h after being warming up to 690 DEG C；Annealing furnace is at 690 DEG C
At a temperature of keep the temperature 0.6h to 2h after, annealing furnace is warming up to 710 DEG C to 730 DEG C in 1.5h to 3h, and be warming up to 710 DEG C extremely
11h to 16h is kept the temperature after 730 DEG C；Annealing furnace 710 DEG C to 730 DEG C at a temperature of heat preservation 11h to 16h after, using furnace cooling
Annealing furnace is cooled down 4.5h to 7.2h by mode.
Further, in soft annealing, annealing furnace is warming up to 400 DEG C at full speed, and keep the temperature 1.8h after being warming up to 400 DEG C
To 2.4h；Annealing furnace 400 DEG C at a temperature of heat preservation 1.8h to 2.4h after, annealing furnace is warming up to 600 in 2.8h to 3.4h
DEG C, and 0.8h to 1.2h is kept the temperature after being warming up to 600 DEG C；Annealing furnace 600 DEG C at a temperature of heat preservation 0.8h to 1.2h after, will move back
Stove is warming up to 690 DEG C in 1.8h to 2.4h, and 0.8h to 1.2h is kept the temperature after being warming up to 690 DEG C；Annealing furnace is at 690 DEG C
At a temperature of keep the temperature 0.8h to 1.2h after, annealing furnace is warming up to 710 DEG C to 730 DEG C in 1.8h to 2.4h, and be warming up to 710
DEG C to keeping the temperature 11.2h to 15.6h after 730 DEG C；Annealing furnace 710 DEG C to 730 DEG C at a temperature of heat preservation 11.2h to 15.6h after, adopt
Annealing furnace is cooled down into 5.2h to 6.4h with the mode of furnace cooling.
Further, it in soft annealing, needs to do detonation test before being heated up, it is ensured that the purity of hydrogen in ammonia destruction furnace；
In entire heating and insulating process, the difference of actual temperature value and process warm angle value is less than 15 DEG C.
It is using above-mentioned further beneficial effect: can effectively ensures the stability of soft annealing roll bending quality.
It further,, need to be first with metallographic microscope to the Oxygen potential of soft annealing roll bending before carrying out pickling in step 4
It is detected, and will test qualified soft annealing roll bending and put on pickling lines.
It is using above-mentioned further beneficial effect: the parameter in production technology can be adjusted in time according to detection data
Value, it is ensured that the quality of production.
Further, in step 6 when carrying out pickling, the minus tolerance of the thickness before and after soft annealing roll bending pickling is less than
0.15mm, the quantity of descaling bath are two, and the quantity of deactivation slot is one, and the quantity of neutralization chamber is one, two descaling baths
Pickling concentration is respectively 18% to 22%, 15% to 18%, and the sour position in two descaling baths is 380mm to 420mm, acid liquor temperature
It is 53 DEG C to 72 DEG C, the pH value of neutralization chamber is 11 to 13, and the pH value of deactivation slot is 7 to 8, and the temperature value of deactivation slot is 38 DEG C to 51
DEG C, the cleaning speed of pickling lines is 5m/min to 15m/min.
It is using above-mentioned further beneficial effect: the oxidation that roll bending generates during soft annealing can be effectively removed
Skin avoids influencing following process.
Further, in the step 3, in spheroidizing, annealing furnace is warming up to 400 DEG C at full speed, and be warming up to
1.5h to 3h is kept the temperature after 400 DEG C；Annealing furnace 400 DEG C at a temperature of heat preservation 1.5h to 3h after, annealing furnace is risen in 2h to 4h
Temperature keeps the temperature 0.6h to 2h to 640 DEG C after being warming up to 640 DEG C；Annealing furnace 640 DEG C at a temperature of heat preservation 0.6h to 2h after,
Annealing furnace is warming up to 730 DEG C in 1.5h to 3h, and keeps the temperature 0.6h to 2h after being warming up to 730 DEG C；Annealing furnace is at 730 DEG C
At a temperature of keep the temperature 0.6h to 2h after, annealing furnace is warming up to 740 DEG C to 760 DEG C in 0.5h to 1.8h, and be warming up to 740 DEG C
11h to 14h is kept the temperature after to 760 DEG C.
Further, in spheroidizing, annealing furnace is warming up to 400 DEG C at full speed, and keep the temperature 1.8h after being warming up to 400 DEG C
To 2.4h；Annealing furnace 400 DEG C at a temperature of heat preservation 1.8h to 2.4h after, annealing furnace is warming up to 640 in 2.5h to 3.2h
DEG C, and 0.6h to 1.2h is kept the temperature after being warming up to 640 DEG C；Annealing furnace 640 DEG C at a temperature of heat preservation 0.6h to 1.2h after, will move back
Stove is warming up to 730 DEG C in 1.8h to 2.4h, and 0.6h to 1.2h is kept the temperature after being warming up to 730 DEG C；Annealing furnace is at 730 DEG C
At a temperature of keep the temperature 0.6h to 1.2h after, annealing furnace is warming up to 740 DEG C to 760 DEG C in 0.6h to 1.2h, and be warming up to 740
DEG C to keeping the temperature 12h to 13.5h after 760 DEG C.
Further, it in spheroidizing, needs to do detonation test before being heated up, it is ensured that the purity of hydrogen in ammonia destruction furnace；
In entire heating and insulating process, the difference of actual temperature value and process warm angle value is less than 15 DEG C.
It is using above-mentioned further beneficial effect: can effectively ensures the stability of spheroidizing roll bending quality.
It further,, need to be first with universal testing machine and hardometer to essence before carrying out second of longitudinal shearing slitting in step 8
The hardness for rolling roll bending is detected, and the acceptability limit of the hardness number of finish rolling roll bending is 75HRB to 85HRB；Hardness number is closed
The finish rolling roll bending of lattice carries out metallographic detection, and the finish rolling roll bending of metallographic detection also qualification is put on small banding machine.
It is using above-mentioned further beneficial effect: the parameter in production technology can be adjusted in time according to detection data
Value, it is ensured that the quality of production.
Detailed description of the invention
Fig. 1 is the curve graph of soft annealing in the processing technology of strip of the present invention；
Fig. 2 is the curve graph of spheroidizing in the processing technology of strip of the present invention；
Fig. 3 is the metallographic of metallographic detection in the processing technology of strip of the present invention referring to figure.
Specific embodiment
The principle and features of the present invention will be described below with reference to the accompanying drawings, and the given examples are served only to explain the present invention, and
It is non-to be used to limit the scope of the invention.
Embodiment one: as shown in Figure 1 and Figure 2, a kind of processing technology of high-strength steel strip includes the following steps:
Step 1: preparing raw material, choosing the hot-rolled coil that the trade mark is SCM435, wherein the change of the hot-rolled coil of SCM435
Study the requirement of part are as follows: C:0.33 to 0.38, Si:0.15 to 0.35, Mn:0.60 to 0.90 :≤0.030 P :≤0.030 S,
Cr:0.90 to 1.20 :≤0.25 Ni, Mo:0.15 to 0.30；The requirement of the mechanical property of the hot-rolled coil of SCM435 are as follows: tension
Intensity :≤1000MPa；The requirement of the metallographic of the hot-rolled coil of SCM435 are as follows: ferrite+pearlitic structrure, decarburized layer work as thickness
>5mm allows Tuo Tan≤1%t, wherein thickness of the t for hot rolled steel plate, Dang Hou Du≤5mm, permission decarburization<50 μm, and banded structure<
2 grades, field trash is carefully < 2 grades, in the present embodiment, choose the hot-rolled coil that the trade mark is SCM435 with a thickness of 3mm to 8.0mm,
It is preferred that 5mm to 6mm；
Step 2: first time longitudinal shearing slitting, the hot-rolled coil got ready in step 1 is transported to first by row device for hoisting
First time longitudinal shearing slitting is carried out on big splitting production line, in order to facilitate subsequent handling processing, hot-rolled coil is in slitting, width side
To the surplus of reserved 0.5mm or so, the thickness tolerance of hot-rolled coil should meet the regulation of GB/T709, convexity requirement: thickness
Less than or equal to 3.0mm, convexity is less than or equal to 40 μm；With a thickness of 3mm to 8.0mm, convexity is less than or equal to 60 μm, and thickness is greater than
8.0mm, convexity are less than or equal to 100 μm, and hot-rolled coil surface must not have bubble, crackle, scab, stick up skin, drawing crack and be mingled with, hot rolling
Roll bending must not have a layering, and surface allows to have the deep point of slight point and part within thickness deviation range half, minute bubbles, light
Micro- scuffing and roll impression；Hot-rolled coil neat in edge, without zigzag, and in slitting, the bounce of blade datum end face should be small
In equal to 0.06mm；
Step 3: soft annealing, by complete first time longitudinal shearing slitting hot-rolled coil annealing is transported to by row device for hoisting
In furnace, annealing furnace uses ammonia destruction furnace, is warming up to 400 DEG C at full speed first, by annealing furnace, and keep the temperature 1h after being warming up to 400 DEG C,
Secondly, annealing furnace 400 DEG C at a temperature of heat preservation 1h after, annealing furnace is warming up to 600 DEG C in 1h, and be warming up to 600 DEG C
After keep the temperature 0.5h, again, annealing furnace 600 DEG C at a temperature of heat preservation 0.5h after, annealing furnace is warming up to 690 DEG C in 1h, and
Keep the temperature 0.5h after being warming up to 690 DEG C, the 4th, annealing furnace 690 DEG C at a temperature of heat preservation 0.5h after, annealing furnace is risen in 1h
Temperature keeps the temperature 10h to 710 DEG C to 730 DEG C after being warming up to 710 DEG C to 730 DEG C, and the 5th, annealing furnace is at 710 DEG C to 730 DEG C
At a temperature of keep the temperature 10h after, by the cooling 4.5h of annealing furnace by the way of furnace cooling, the 6th, by the way of furnace cooling
After 4.5h cooling to annealing furnace, change to annealing furnace that cover is air-cooled, and the temperature of annealing furnace is down to 280 DEG C, the 7th, annealing furnace
Temperature be down to 280 DEG C after, by the way of water cooling, the temperature of annealing furnace is down to 80 DEG C by 280 DEG C, it is last, come out of the stove, be made
Soft annealing roll bending；
Step 4: pickling, the soft annealing roll bending that soft annealing obtains is transported to pickling lines by row device for hoisting
Upper carry out pickling, and pickling roll bending is made；
Step 5: rolling, the pickling roll bending obtained after pickling be transported on production line of rolling mill by row device for hoisting carrying out
Rolling, and be made rolling roll bending, wherein roll bending roll after with a thickness of 4mm；
Step 6: spheroidizing, the rolling roll bending obtained after rolling be transported in annealing furnace by row device for hoisting carrying out
Spheroidizing, annealing furnace use ammonia destruction furnace, are warming up to 400 DEG C at full speed first, by annealing furnace, and protect after being warming up to 400 DEG C
Warm 1h, secondly, annealing furnace 400 DEG C at a temperature of heat preservation 1h after, annealing furnace is warming up to 640 DEG C in 1h, and be warming up to
0.5h is kept the temperature after 640 DEG C, again, annealing furnace 640 DEG C at a temperature of heat preservation 0.5h after, annealing furnace is warming up to 730 in 1h
DEG C, and 0.5h is kept the temperature after being warming up to 730 DEG C, the 4th, annealing furnace 730 DEG C at a temperature of heat preservation 0.5h after, annealing furnace is existed
Be warming up to 740 DEG C to 760 DEG C in 0.5h, and keep the temperature 10h after being warming up to 740 DEG C to 760 DEG C, the 5th, annealing furnace at 740 DEG C extremely
After keeping the temperature 10h at a temperature of 760 DEG C, the temperature of annealing furnace is down to 550 DEG C to 600 DEG C by the way of furnace cooling, the 6th,
After the temperature of annealing furnace is down to 550 DEG C to 600 DEG C by the way of furnace cooling, it is air-cooled change cover to annealing furnace, and
The temperature of annealing furnace is down to 280 DEG C, the 7th, after the temperature of annealing furnace is down to 280 DEG C, by the way of water cooling, by annealing furnace
Temperature be down to 80 DEG C by 280 DEG C, it is last, come out of the stove, spheroidizing roll bending is made；
Step 7: finish rolling, by the spheroidizing roll bending obtained after spheroidizing by row device for hoisting be transported to milling train production
Carry out finish rolling on line, and finish rolling roll bending be made, wherein finish rolling roll bending with a thickness of 3.5mm；
Step 8: second of longitudinal shearing slitting, the finish rolling roll bending that finish rolling obtains is transported to small banding machine by row device for hoisting
Second of longitudinal shearing slitting of upper progress, and slitting roll bending is made；
Step 9: being packed and stored, being packaged using baling press to slitting roll bending obtained after second of longitudinal shearing slitting
Packaging.
Embodiment two: as shown in Figure 1 and Figure 2, a kind of processing technology of high-strength steel strip includes the following steps:
Step 1: preparing raw material, choosing the hot-rolled coil that the trade mark is SCM435, wherein the change of the hot-rolled coil of SCM435
Study the requirement of part are as follows: C:0.33 to 0.38, Si:0.15 to 0.35, Mn:0.60 to 0.90 :≤0.030 P :≤0.030 S,
Cr:0.90 to 1.20 :≤0.25 Ni, Mo:0.15 to 0.30；The requirement of the mechanical property of the hot-rolled coil of SCM435 are as follows: tension
Intensity :≤1000MPa；The requirement of the metallographic of the hot-rolled coil of SCM435 are as follows: ferrite+pearlitic structrure, decarburized layer work as thickness
>5mm allows Tuo Tan≤1%t, wherein thickness of the t for hot rolled steel plate, Dang Hou Du≤5mm, permission decarburization<50 μm, and banded structure<
2 grades, field trash is carefully < 2 grades, in the present embodiment, choose the hot-rolled coil that the trade mark is SCM435 with a thickness of 3mm to 8.0mm,
It is preferred that 5mm to 6mm；
Step 2: first time longitudinal shearing slitting, the hot-rolled coil got ready in step 1 is transported to first by row device for hoisting
First time longitudinal shearing slitting is carried out on big splitting production line, in order to facilitate subsequent handling processing, hot-rolled coil is in slitting, width side
To the surplus of reserved 0.5mm or so, the thickness tolerance of hot-rolled coil should meet the regulation of GB/T709, convexity requirement: thickness
Less than or equal to 3.0mm, convexity is less than or equal to 40 μm；With a thickness of 3mm to 8.0mm, convexity is less than or equal to 60 μm, and thickness is greater than
8.0mm, convexity are less than or equal to 100 μm, and hot-rolled coil surface must not have bubble, crackle, scab, stick up skin, drawing crack and be mingled with, hot rolling
Roll bending must not have a layering, and surface allows to have the deep point of slight point and part within thickness deviation range half, minute bubbles, light
Micro- scuffing and roll impression；Hot-rolled coil neat in edge, without zigzag, and in slitting, the bounce of blade datum end face should be small
In equal to 0.06mm；
Step 3: soft annealing, by complete first time longitudinal shearing slitting hot-rolled coil annealing is transported to by row device for hoisting
In furnace, annealing furnace uses ammonia destruction furnace, is warming up to 400 DEG C at full speed first, by annealing furnace, and keep the temperature after being warming up to 400 DEG C
1.8h, secondly, annealing furnace 400 DEG C at a temperature of heat preservation 1.8h after, annealing furnace is warming up to 600 DEG C in 2.8h, and rising
Temperature to 0.8h is kept the temperature after 600 DEG C, again, annealing furnace 600 DEG C at a temperature of heat preservation 0.8h after, annealing furnace is heated up in 1.8h
To 690 DEG C, and 0.8h is kept the temperature after being warming up to 690 DEG C, the 4th, annealing furnace 690 DEG C at a temperature of heat preservation 0.8h after, will anneal
Furnace is warming up to 710 DEG C to 730 DEG C in 1.8h, and 11.2h is kept the temperature after being warming up to 710 DEG C to 730 DEG C, and the 5th, annealing furnace exists
After keeping the temperature 11.2h at a temperature of 710 DEG C to 730 DEG C, by the cooling 5.2h of annealing furnace by the way of furnace cooling, the 6th, adopting
After the mode of furnace cooling 5.2h cooling to annealing furnace, change to annealing furnace that cover is air-cooled, and the temperature of annealing furnace is down to
280 DEG C, the 7th, after the temperature of annealing furnace is down to 280 DEG C, by the way of water cooling, the temperature of annealing furnace is down to 80 by 280 DEG C
DEG C, it finally, comes out of the stove, soft annealing roll bending is made；
Step 4: pickling, the soft annealing roll bending that soft annealing obtains is transported to pickling lines by row device for hoisting
Upper carry out pickling, and pickling roll bending is made；
Step 5: rolling, the pickling roll bending obtained after pickling be transported on production line of rolling mill by row device for hoisting carrying out
Rolling, and be made rolling roll bending, wherein roll bending roll after with a thickness of 4mm；
Step 6: spheroidizing, the rolling roll bending obtained after rolling be transported in annealing furnace by row device for hoisting carrying out
Spheroidizing, annealing furnace use ammonia destruction furnace, are warming up to 400 DEG C at full speed first, by annealing furnace, and protect after being warming up to 400 DEG C
Warm 1.8h, secondly, annealing furnace 400 DEG C at a temperature of heat preservation 1.8h after, annealing furnace is warming up to 640 DEG C in 2.5h, and
0.6h is kept the temperature after being warming up to 640 DEG C, again, annealing furnace 640 DEG C at a temperature of heat preservation 0.6h after, annealing furnace is risen in 1.8h
Temperature keeps the temperature 0.6h to 730 DEG C after being warming up to 730 DEG C, the 4th, annealing furnace 730 DEG C at a temperature of heat preservation 0.6h after, will move back
Stove is warming up to 740 DEG C to 760 DEG C in 0.6h, and 12h is kept the temperature after being warming up to 740 DEG C to 760 DEG C, and the 5th, annealing furnace exists
After keeping the temperature 12h at a temperature of 740 DEG C to 760 DEG C, the temperature of annealing furnace is down to 550 DEG C to 600 by the way of furnace cooling
DEG C, the 6th, after the temperature of annealing furnace is down to 550 DEG C to 600 DEG C by the way of furnace cooling, annealing furnace is carried out to change cover
It is air-cooled, and the temperature of annealing furnace is down to 280 DEG C, the 7th, after the temperature of annealing furnace is down to 280 DEG C, it, will by the way of water cooling
The temperature of annealing furnace is down to 80 DEG C by 280 DEG C, finally, comes out of the stove, and spheroidizing roll bending is made；
Step 7: finish rolling, by the spheroidizing roll bending obtained after spheroidizing by row device for hoisting be transported to milling train production
Carry out finish rolling on line, and finish rolling roll bending be made, wherein finish rolling roll bending with a thickness of 3.5mm；
Step 8: second of longitudinal shearing slitting, the finish rolling roll bending that finish rolling obtains is transported to small banding machine by row device for hoisting
Second of longitudinal shearing slitting of upper progress, and slitting roll bending is made；
Step 9: being packed and stored, being packaged using baling press to slitting roll bending obtained after second of longitudinal shearing slitting
Packaging.
Embodiment three: as shown in Figure 1 and Figure 2, a kind of processing technology of high-strength steel strip includes the following steps:
Step 1: preparing raw material, choosing the hot-rolled coil that the trade mark is SCM435, wherein the change of the hot-rolled coil of SCM435
Study the requirement of part are as follows: C:0.33 to 0.38, Si:0.15 to 0.35, Mn:0.60 to 0.90 :≤0.030 P :≤0.030 S,
Cr:0.90 to 1.20 :≤0.25 Ni, Mo:0.15 to 0.30；The requirement of the mechanical property of the hot-rolled coil of SCM435 are as follows: tension
Intensity :≤1000MPa；The requirement of the metallographic of the hot-rolled coil of SCM435 are as follows: ferrite+pearlitic structrure, decarburized layer work as thickness
>5mm allows Tuo Tan≤1%t, wherein thickness of the t for hot rolled steel plate, Dang Hou Du≤5mm, permission decarburization<50 μm, and banded structure<
2 grades, field trash is carefully < 2 grades, in the present embodiment, choose the hot-rolled coil that the trade mark is SCM435 with a thickness of 3mm to 8.0mm,
It is preferred that 5mm to 6mm；
Step 2: first time longitudinal shearing slitting, the hot-rolled coil got ready in step 1 is transported to first by row device for hoisting
First time longitudinal shearing slitting is carried out on big splitting production line, in order to facilitate subsequent handling processing, hot-rolled coil is in slitting, width side
To the surplus of reserved 0.5mm or so, the thickness tolerance of hot-rolled coil should meet the regulation of GB/T709, convexity requirement: thickness
Less than or equal to 3.0mm, convexity is less than or equal to 40 μm；With a thickness of 3mm to 8.0mm, convexity is less than or equal to 60 μm, and thickness is greater than
8.0mm, convexity are less than or equal to 100 μm, and hot-rolled coil surface must not have bubble, crackle, scab, stick up skin, drawing crack and be mingled with, hot rolling
Roll bending must not have a layering, and surface allows to have the deep point of slight point and part within thickness deviation range half, minute bubbles, light
Micro- scuffing and roll impression；Hot-rolled coil neat in edge, without zigzag, and in slitting, the bounce of blade datum end face should be small
In equal to 0.06mm；
Step 3: soft annealing, by complete first time longitudinal shearing slitting hot-rolled coil annealing is transported to by row device for hoisting
In furnace, annealing furnace uses ammonia destruction furnace, is warming up to 400 DEG C at full speed first, by annealing furnace, and keep the temperature after being warming up to 400 DEG C
2.4h, secondly, annealing furnace 400 DEG C at a temperature of heat preservation 2.4h after, annealing furnace is warming up to 600 DEG C in 3.4h, and rising
Temperature to 1.2h is kept the temperature after 600 DEG C, again, annealing furnace 600 DEG C at a temperature of heat preservation 1.2h after, annealing furnace is heated up in 2.4h
To 690 DEG C, and 1.2h is kept the temperature after being warming up to 690 DEG C, the 4th, annealing furnace 690 DEG C at a temperature of heat preservation 1.2h after, will anneal
Furnace is warming up to 710 DEG C to 730 DEG C in 2.4h, and 15.6h is kept the temperature after being warming up to 710 DEG C to 730 DEG C, and the 5th, annealing furnace exists
After keeping the temperature 15.6h at a temperature of 710 DEG C to 730 DEG C, by the cooling 6.4h of annealing furnace by the way of furnace cooling, the 6th, adopting
After the mode of furnace cooling 6.4h cooling to annealing furnace, change to annealing furnace that cover is air-cooled, and the temperature of annealing furnace is down to
280 DEG C, the 7th, after the temperature of annealing furnace is down to 280 DEG C, by the way of water cooling, the temperature of annealing furnace is down to 80 by 280 DEG C
DEG C, it finally, comes out of the stove, soft annealing roll bending is made；
Step 4: pickling, the soft annealing roll bending that soft annealing obtains is transported to pickling lines by row device for hoisting
Upper carry out pickling, and pickling roll bending is made；
Step 5: rolling, the pickling roll bending obtained after pickling be transported on production line of rolling mill by row device for hoisting carrying out
Rolling, and be made rolling roll bending, wherein roll bending roll after with a thickness of 4mm；
Step 6: spheroidizing, the rolling roll bending obtained after rolling be transported in annealing furnace by row device for hoisting carrying out
Spheroidizing, annealing furnace use ammonia destruction furnace, are warming up to 400 DEG C at full speed first, by annealing furnace, and protect after being warming up to 400 DEG C
Warm 2.4h, secondly, annealing furnace 400 DEG C at a temperature of heat preservation 2.4h after, annealing furnace is warming up to 640 DEG C in 3.2h, and
1.2h is kept the temperature after being warming up to 640 DEG C, again, annealing furnace 640 DEG C at a temperature of heat preservation 1.2h after, annealing furnace is risen in 2.4h
Temperature keeps the temperature 1.2h to 730 DEG C after being warming up to 730 DEG C, the 4th, annealing furnace 730 DEG C at a temperature of heat preservation 1.2h after, will move back
Stove is warming up to 740 DEG C to 760 DEG C in 1.2h, and 14h is kept the temperature after being warming up to 740 DEG C to 760 DEG C, and the 5th, annealing furnace exists
After keeping the temperature 14h at a temperature of 740 DEG C to 760 DEG C, the temperature of annealing furnace is down to 550 DEG C to 600 by the way of furnace cooling
DEG C, the 6th, after the temperature of annealing furnace is down to 550 DEG C to 600 DEG C by the way of furnace cooling, annealing furnace is carried out to change cover
It is air-cooled, and the temperature of annealing furnace is down to 280 DEG C, the 7th, after the temperature of annealing furnace is down to 280 DEG C, it, will by the way of water cooling
The temperature of annealing furnace is down to 80 DEG C by 280 DEG C, finally, comes out of the stove, and spheroidizing roll bending is made；
Step 7: finish rolling, by the spheroidizing roll bending obtained after spheroidizing by row device for hoisting be transported to milling train production
Carry out finish rolling on line, and finish rolling roll bending be made, wherein finish rolling roll bending with a thickness of 3.5mm；
Step 8: second of longitudinal shearing slitting, the finish rolling roll bending that finish rolling obtains is transported to small banding machine by row device for hoisting
Second of longitudinal shearing slitting of upper progress, and slitting roll bending is made；
Step 9: being packed and stored, being packaged using baling press to slitting roll bending obtained after second of longitudinal shearing slitting
Packaging.
Example IV: as shown in Figure 1 and Figure 2, a kind of processing technology of high-strength steel strip includes the following steps:
Step 1: preparing raw material, choosing the hot-rolled coil that the trade mark is SCM435, wherein the change of the hot-rolled coil of SCM435
Study the requirement of part are as follows: C:0.33 to 0.38, Si:0.15 to 0.35, Mn:0.60 to 0.90 :≤0.030 P :≤0.030 S,
Cr:0.90 to 1.20 :≤0.25 Ni, Mo:0.15 to 0.30；The requirement of the mechanical property of the hot-rolled coil of SCM435 are as follows: tension
Intensity :≤1000MPa；The requirement of the metallographic of the hot-rolled coil of SCM435 are as follows: ferrite+pearlitic structrure, decarburized layer work as thickness
>5mm allows Tuo Tan≤1%t, wherein thickness of the t for hot rolled steel plate, Dang Hou Du≤5mm, permission decarburization<50 μm, and banded structure<
2 grades, field trash is carefully < 2 grades, in the present embodiment, choose the hot-rolled coil that the trade mark is SCM435 with a thickness of 3mm to 8.0mm,
It is preferred that 5mm to 6mm；
Step 2: first time longitudinal shearing slitting, the hot-rolled coil got ready in step 1 is transported to first by row device for hoisting
First time longitudinal shearing slitting is carried out on big splitting production line, in order to facilitate subsequent handling processing, hot-rolled coil is in slitting, width side
To the surplus of reserved 0.5mm or so, the thickness tolerance of hot-rolled coil should meet the regulation of GB/T709, convexity requirement: thickness
Less than or equal to 3.0mm, convexity is less than or equal to 40 μm；With a thickness of 3mm to 8.0mm, convexity is less than or equal to 60 μm, and thickness is greater than
8.0mm, convexity are less than or equal to 100 μm, and hot-rolled coil surface must not have bubble, crackle, scab, stick up skin, drawing crack and be mingled with, hot rolling
Roll bending must not have a layering, and surface allows to have the deep point of slight point and part within thickness deviation range half, minute bubbles, light
Micro- scuffing and roll impression；Hot-rolled coil neat in edge, without zigzag, and in slitting, the bounce of blade datum end face should be small
In equal to 0.06mm；
Step 3: soft annealing, by complete first time longitudinal shearing slitting hot-rolled coil annealing is transported to by row device for hoisting
In furnace, annealing furnace uses ammonia destruction furnace, is warming up to 400 DEG C at full speed first, by annealing furnace, and keep the temperature 5h after being warming up to 400 DEG C,
Secondly, annealing furnace 400 DEG C at a temperature of heat preservation 5h after, annealing furnace is warming up to 600 DEG C in 6h, and be warming up to 600 DEG C
After keep the temperature 4h, again, annealing furnace 600 DEG C at a temperature of heat preservation 4h after, annealing furnace is warming up to 690 DEG C in 5h, and rising
Temperature to keeping the temperature 4h after 690 DEG C, the 4th, annealing furnace 690 DEG C at a temperature of heat preservation 4h after, annealing furnace is warming up to 710 in 5h
DEG C to 730 DEG C, and 18h is kept the temperature after being warming up to 710 DEG C to 730 DEG C, the 5th, annealing furnace 710 DEG C to 730 DEG C at a temperature of protect
After warm 18h, by the cooling 7.2h of annealing furnace by the way of furnace cooling, the 6th, by the way of furnace cooling to annealing furnace
After cooling 7.2h, change to annealing furnace that cover is air-cooled, and the temperature of annealing furnace is down to 280 DEG C, the 7th, the temperature drop of annealing furnace
To after 280 DEG C, by the way of water cooling, the temperature of annealing furnace is down to 80 DEG C by 280 DEG C, finally, is come out of the stove, soft annealing is made
Roll bending；
Step 4: pickling, the soft annealing roll bending that soft annealing obtains is transported to pickling lines by row device for hoisting
Upper carry out pickling, and pickling roll bending is made；
Step 5: rolling, the pickling roll bending obtained after pickling be transported on production line of rolling mill by row device for hoisting carrying out
Rolling, and be made rolling roll bending, wherein roll bending roll after with a thickness of 4mm；
Step 6: spheroidizing, the rolling roll bending obtained after rolling be transported in annealing furnace by row device for hoisting carrying out
Spheroidizing, annealing furnace use ammonia destruction furnace, are warming up to 400 DEG C at full speed first, by annealing furnace, and protect after being warming up to 400 DEG C
Warm 5h, secondly, annealing furnace 400 DEG C at a temperature of heat preservation 5h after, annealing furnace is warming up to 640 DEG C in 6h, and be warming up to
4h is kept the temperature after 640 DEG C, again, annealing furnace 640 DEG C at a temperature of heat preservation 4h after, annealing furnace is warming up to 730 DEG C in 4h, and
Keep the temperature 5h after being warming up to 730 DEG C, the 4th, annealing furnace 730 DEG C at a temperature of heat preservation 5h after, annealing furnace is warming up in 2h
740 DEG C to 760 DEG C, and 16h is kept the temperature after being warming up to 740 DEG C to 760 DEG C, the 5th, temperature of the annealing furnace at 740 DEG C to 760 DEG C
After lower heat preservation 16h, the temperature of annealing furnace is down to 550 DEG C to 600 DEG C by the way of furnace cooling, the 6th, using with furnace
After the temperature of annealing furnace is down to 550 DEG C to 600 DEG C by cooling mode, change to annealing furnace that cover is air-cooled, and by annealing furnace
Temperature is down to 280 DEG C, and the 7th, after the temperature of annealing furnace is down to 280 DEG C, by the way of water cooling, by the temperature of annealing furnace by 280
DEG C 80 DEG C are down to, it is last, come out of the stove, spheroidizing roll bending is made；
Step 7: finish rolling, by the spheroidizing roll bending obtained after spheroidizing by row device for hoisting be transported to milling train production
Carry out finish rolling on line, and finish rolling roll bending be made, wherein finish rolling roll bending with a thickness of 3.5mm；
Step 8: second of longitudinal shearing slitting, the finish rolling roll bending that finish rolling obtains is transported to small banding machine by row device for hoisting
Second of longitudinal shearing slitting of upper progress, and slitting roll bending is made；
Step 9: being packed and stored, being packaged using baling press to slitting roll bending obtained after second of longitudinal shearing slitting
Packaging.
Embodiment five: as shown in Figure 1 and Figure 2, a kind of processing technology of high-strength steel strip includes the following steps:
Step 1: preparing raw material, choosing the hot-rolled coil that the trade mark is SCM435, wherein the change of the hot-rolled coil of SCM435
Study the requirement of part are as follows: C:0.33 to 0.38, Si:0.15 to 0.35, Mn:0.60 to 0.90 :≤0.030 P :≤0.030 S,
Cr:0.90 to 1.20 :≤0.25 Ni, Mo:0.15 to 0.30；The requirement of the mechanical property of the hot-rolled coil of SCM435 are as follows: tension
Intensity :≤1000MPa；The requirement of the metallographic of the hot-rolled coil of SCM435 are as follows: ferrite+pearlitic structrure, decarburized layer work as thickness
>5mm allows Tuo Tan≤1%t, wherein thickness of the t for hot rolled steel plate, Dang Hou Du≤5mm, permission decarburization<50 μm, and banded structure<
2 grades, field trash is carefully < 2 grades, in the present embodiment, choose the hot-rolled coil that the trade mark is SCM435 with a thickness of 3mm to 8.0mm,
It is preferred that 5mm to 6mm；
Step 2: first time longitudinal shearing slitting, the hot-rolled coil got ready in step 1 is transported to first by row device for hoisting
First time longitudinal shearing slitting is carried out on big splitting production line, in order to facilitate subsequent handling processing, hot-rolled coil is in slitting, width side
To the surplus of reserved 0.5mm or so, the thickness tolerance of hot-rolled coil should meet the regulation of GB/T709, convexity requirement: thickness
Less than or equal to 3.0mm, convexity is less than or equal to 40 μm；With a thickness of 3mm to 8.0mm, convexity is less than or equal to 60 μm, and thickness is greater than
8.0mm, convexity are less than or equal to 100 μm, and hot-rolled coil surface must not have bubble, crackle, scab, stick up skin, drawing crack and be mingled with, hot rolling
Roll bending must not have a layering, and surface allows to have the deep point of slight point and part within thickness deviation range half, minute bubbles, light
Micro- scuffing and roll impression；Hot-rolled coil neat in edge, without zigzag, and in slitting, the bounce of blade datum end face should be small
In equal to 0.06mm；
Step 3: soft annealing, by complete first time longitudinal shearing slitting hot-rolled coil annealing is transported to by row device for hoisting
In furnace, annealing furnace uses ammonia destruction furnace, is warming up to 400 DEG C at full speed first, by annealing furnace, and keep the temperature 2h after being warming up to 400 DEG C,
Secondly, annealing furnace 400 DEG C at a temperature of heat preservation 2h after, annealing furnace is warming up to 600 DEG C in 3h, and be warming up to 600 DEG C
After keep the temperature 1h, again, annealing furnace 600 DEG C at a temperature of heat preservation 1h after, annealing furnace is warming up to 690 DEG C in 2h, and rising
Temperature to keeping the temperature 1h after 690 DEG C, the 4th, annealing furnace 690 DEG C at a temperature of heat preservation 1h after, annealing furnace is warming up to 710 in 2h
DEG C to 730 DEG C, and 13h is kept the temperature after being warming up to 710 DEG C to 730 DEG C, the 5th, annealing furnace 710 DEG C to 730 DEG C at a temperature of protect
After warm 13h, by the cooling 6h of annealing furnace by the way of furnace cooling, the 6th, cold to annealing furnace by the way of furnace cooling
But after 6h, change to annealing furnace that cover is air-cooled, and the temperature of annealing furnace is down to 280 DEG C, the 7th, the temperature of annealing furnace is down to
After 280 DEG C, by the way of water cooling, the temperature of annealing furnace is down to 80 DEG C by 280 DEG C, finally, is come out of the stove, soft annealing volume is made
Plate；
Step 4: pickling, the soft annealing roll bending that soft annealing obtains is transported to pickling lines by row device for hoisting
Upper carry out pickling, and pickling roll bending is made；
Step 5: rolling, the pickling roll bending obtained after pickling be transported on production line of rolling mill by row device for hoisting carrying out
Rolling, and be made rolling roll bending, wherein roll bending roll after with a thickness of 4mm；
Step 6: spheroidizing, the rolling roll bending obtained after rolling be transported in annealing furnace by row device for hoisting carrying out
Spheroidizing, annealing furnace use ammonia destruction furnace, are warming up to 400 DEG C at full speed first, by annealing furnace, and protect after being warming up to 400 DEG C
Warm 2h, secondly, annealing furnace 400 DEG C at a temperature of heat preservation 2h after, annealing furnace is warming up to 640 DEG C in 3h, and be warming up to
1h is kept the temperature after 640 DEG C, again, annealing furnace 640 DEG C at a temperature of heat preservation 1h after, annealing furnace is warming up to 730 DEG C in 2h, and
Keep the temperature 1h after being warming up to 730 DEG C, the 4th, annealing furnace 730 DEG C at a temperature of heat preservation 1h after, annealing furnace is warming up in 1h
740 DEG C to 760 DEG C, and 12h is kept the temperature after being warming up to 740 DEG C to 760 DEG C, the 5th, temperature of the annealing furnace at 740 DEG C to 760 DEG C
After lower heat preservation 12h, the temperature of annealing furnace is down to 550 DEG C to 600 DEG C by the way of furnace cooling, the 6th, using with furnace
After the temperature of annealing furnace is down to 550 DEG C to 600 DEG C by cooling mode, change to annealing furnace that cover is air-cooled, and by annealing furnace
Temperature is down to 280 DEG C, and the 7th, after the temperature of annealing furnace is down to 280 DEG C, by the way of water cooling, by the temperature of annealing furnace by 280
DEG C 80 DEG C are down to, it is last, come out of the stove, spheroidizing roll bending is made；
Step 7: finish rolling, by the spheroidizing roll bending obtained after spheroidizing by row device for hoisting be transported to milling train production
Carry out finish rolling on line, and finish rolling roll bending be made, wherein finish rolling roll bending with a thickness of 3.5mm；
Step 8: second of longitudinal shearing slitting, the finish rolling roll bending that finish rolling obtains is transported to small banding machine by row device for hoisting
Second of longitudinal shearing slitting of upper progress, and slitting roll bending is made；
Step 9: being packed and stored, being packaged using baling press to slitting roll bending obtained after second of longitudinal shearing slitting
Packaging.
In the present invention, it is preferred to which the technical solution of embodiment five is formulated specific according to the thickness of corresponding hot-rolled coil
Soft annealing, spheroidizing operating process, to effectively control the stability and product for the product quality produced
Performance, when the thickness of hot-rolled coil changes, soft annealing, spheroidizing operating process be also required to change.
It in soft annealing, needs to do detonation test before being heated up, it is ensured that the purity of hydrogen in ammonia destruction furnace；Entirely rising
In temperature and insulating process, less than 15 DEG C, actual temperature value is measured the difference of actual temperature value and process warm angle value by thermocouple, inspection
The frequency of survey is 1 time/1h, in addition, can increase heat preservation platform, suitably in temperature-rise period to meet theoretical raising speed.
It in spheroidizing, needs to do detonation test before being heated up, it is ensured that the purity of hydrogen in ammonia destruction furnace；Entirely rising
In temperature and insulating process, less than 15 DEG C, actual temperature value is measured the difference of actual temperature value and process warm angle value by thermocouple, inspection
The frequency of survey is 1 time/1h, in addition, can increase heat preservation platform, suitably in temperature-rise period to meet theoretical raising speed.
Strip needs to be detected twice in entire production technology, wherein once before carrying out pickling, it is aobvious by metallographic
Micro mirror detects the Oxygen potential of soft annealing roll bending, and will test qualified soft annealing roll bending and put into pickling lines
On, soft annealing roll bending is wherein determined in Oxygen potential detection process, and whether qualified standard is according to JB/T 5074-2007 standard component
In, 5 grades or 6 grades of the classification of medium carbon structural alloy steel nodularization body；In addition once before carrying out second of longitudinal shearing slitting, by omnipotent
Testing machine and hardometer detect the hardness of finish rolling roll bending, and the acceptability limit of the hardness number of finish rolling roll bending is 75HRB
To 85HRB；Metallographic detection is carried out to the finish rolling roll bending of hardness number qualification, the finish rolling roll bending of metallographic detection also qualification is put into small
On banding machine, the regulation of metallographic detection reference JB/T5074 to 2007, wherein referring to shown in Fig. 3.
When carrying out second of longitudinal shearing slitting need on slitting roll bending antirust oil；When carrying out the second longitudinal shearing slitting, hot rolling
Roll bending surface must not have bubble, crackle, scab, stick up skin, drawing crack and be mingled with, and hot-rolled coil must not have layering, and surface allows to have thickness
Spend the deep point of slight point and part, minute bubbles, slight scuffing and the roll impression within margin of tolerance half；Hot rolled coil edges of boards
Edge is neat, without zigzag, and the bounce of blade datum end face should be less than or equal to 0.06mm.
When being rolled, obtained rolling roll bending surface is without sticking up skin, pit, point, yellow rust, scale, scuffing, template
It is straight；Edge: without plucking, broken side.The surface for the slitting roll bending that second of longitudinal shearing slitting obtains is without sticking up skin, point, pit, water
Rust, scuffing, yellow rust, coining, plate shape is straight, edge is without broken side；It needs when carrying out second of longitudinal shearing slitting toward on slitting roll bending
Antirust oil.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (7)
1. a kind of processing technology of high-strength steel strip, which comprises the steps of:
Step 1: preparing raw material, choosing the hot-rolled coil that the trade mark is SCM435；
Step 2: first time longitudinal shearing slitting, that the hot-rolled coil got ready in step 1 by row device for hoisting is transported to first is big vertical
Cut progress first time longitudinal shearing slitting on production line；
Step 3: soft annealing, by complete first time longitudinal shearing slitting hot-rolled coil be transported in annealing furnace by row device for hoisting,
The annealing furnace uses ammonia destruction furnace, is warming up to 400 DEG C at full speed first, by annealing furnace, and keep the temperature 1.8h after being warming up to 400 DEG C
To 2.4h, secondly, annealing furnace 400 DEG C at a temperature of heat preservation 1.8h to 2.4h after, annealing furnace is warming up in 1h to 2.8h
600 DEG C, and after being warming up to 600 DEG C keep the temperature 0.5h to 0.8h, again, annealing furnace 600 DEG C at a temperature of heat preservation 0.5h extremely
After 0.8h, annealing furnace is warming up to 690 DEG C in 1h to 5h, and keeps the temperature 0.5h to 4h after being warming up to 690 DEG C, the 4th, annealing
Furnace 690 DEG C at a temperature of heat preservation 0.5h to 4h after, annealing furnace is warming up to 710 DEG C to 730 DEG C in 1h to 5h, and heating up
After to 710 DEG C to 730 DEG C keep the temperature 10h to 11.2h, the 5th, annealing furnace 710 DEG C to 730 DEG C at a temperature of heat preservation 10h extremely
After 11.2h, by the cooling 4h to 6.4h of annealing furnace by the way of furnace cooling, the 6th, by the way of furnace cooling to moving back
After the cooling 4h to 6.4h of stove, change to annealing furnace that cover is air-cooled, and the temperature of annealing furnace is down to 280 DEG C, the 7th, annealing furnace
Temperature be down to 280 DEG C after, by the way of water cooling, the temperature of annealing furnace is down to 80 DEG C by 280 DEG C, it is last, come out of the stove, be made
Soft annealing roll bending；
Step 4: pickling, that soft annealing roll bending that soft annealing obtains by row device for hoisting is transported to pickling lines is enterprising
Row pickling, and pickling roll bending is made；
Step 5: rolling, the pickling roll bending obtained after pickling is transported on production line of rolling mill by row device for hoisting rolls,
And rolling roll bending is made, after roll bending rolling with a thickness of 4mm；
Step 6: spheroidizing, the rolling roll bending obtained after rolling be transported in annealing furnace by row device for hoisting carrying out nodularization
Annealing, the annealing furnace use ammonia destruction furnace, are warming up to 400 DEG C at full speed first, by annealing furnace, and protect after being warming up to 400 DEG C
Warm 1h to 5h, secondly, annealing furnace 400 DEG C at a temperature of heat preservation 1h to 5h after, annealing furnace is warming up to 640 in 1h to 6h
DEG C, and after being warming up to 640 DEG C keep the temperature 0.5h to 4h, again, annealing furnace 640 DEG C at a temperature of heat preservation 0.5h to 4h after, will
Annealing furnace is warming up to 730 DEG C in 1h to 5h, and 0.5h to 4h is kept the temperature after being warming up to 730 DEG C, and the 4th, annealing furnace is at 730 DEG C
At a temperature of keep the temperature 0.5h to 4h after, annealing furnace is warming up to 740 DEG C to 760 DEG C in 0.5h to 2h, and be warming up to 740 DEG C
After to 760 DEG C keep the temperature 10h to 16h, the 5th, annealing furnace 740 DEG C to 760 DEG C at a temperature of heat preservation 10h to 16h after, using with
The temperature of annealing furnace is down to 550 DEG C to 600 DEG C by the cooling mode of furnace, the 6th, by the way of furnace cooling by annealing furnace
Temperature be down to 550 DEG C to 600 DEG C after, change to annealing furnace that cover is air-cooled, and the temperature of annealing furnace is down to 280 DEG C, the 7th,
After the temperature of annealing furnace is down to 280 DEG C, by the way of water cooling, the temperature of annealing furnace is down to 80 DEG C by 280 DEG C, finally, is gone out
Spheroidizing roll bending is made in furnace；
Step 7: finish rolling, the spheroidizing roll bending obtained after spheroidizing is transported on production line of rolling mill by row device for hoisting
Carry out finish rolling, and be made finish rolling roll bending, the finish rolling roll bending with a thickness of 3.5mm；
Step 8: second of longitudinal shearing slitting, that finish rolling roll bending that finish rolling obtains by row device for hoisting is transported to small banding machine is enterprising
Second of longitudinal shearing slitting of row, and slitting roll bending is made；
Step 9: being packed and stored, carrying out packing packaging to slitting roll bending obtained after second of longitudinal shearing slitting using baling press.
2. a kind of processing technology of high-strength steel strip according to claim 1, which is characterized in that in soft annealing, into
It needs to do detonation test before row heating, it is ensured that the purity of hydrogen in ammonia destruction furnace；In entire heating and insulating process, actual temperature
The difference of value and process warm angle value is less than 15 DEG C.
3. a kind of processing technology of high-strength steel strip according to claim 1, which is characterized in that in the step 4,
It before carrying out pickling, need to be detected first with Oxygen potential of the metallographic microscope to soft annealing roll bending, and will test the soft of qualification
Annealing roll bending is put on pickling lines.
4. a kind of processing technology of high-strength steel strip according to claim 1, which is characterized in that in the step 4 into
When row pickling, the minus tolerance of the thickness before and after soft annealing roll bending pickling is less than 0.15mm, and the quantity of descaling bath is two, deactivation slot
Quantity be one, the quantity of neutralization chamber is one, the pickling concentration of two descaling baths be respectively 18% to 22%, 15% to
18%, the sour position in two descaling baths is 380mm to 420mm, and acid liquor temperature is 53 DEG C to 72 DEG C, the pH value of neutralization chamber be 11 to
13, the pH value of deactivation slot is 7 to 8, and the temperature value of deactivation slot is 38 DEG C to 51 DEG C, and the cleaning speed of pickling lines is 5m/min
To 15m/min.
5. a kind of processing technology of high-strength steel strip according to claim 4, which is characterized in that, will in spheroidizing
Annealing furnace is warming up to 400 DEG C at full speed, and 1.8h to 2.4h is kept the temperature after being warming up to 400 DEG C；Annealing furnace 400 DEG C at a temperature of protect
After warm 1.8h to 2.4h, annealing furnace is warming up to 640 DEG C in 2.5h to 3.2h, and keeps the temperature 0.6h extremely after being warming up to 640 DEG C
1.2h；Annealing furnace 640 DEG C at a temperature of heat preservation 0.6h to 1.2h after, annealing furnace is warming up to 730 DEG C in 1.8h to 2.4h,
And 0.6h to 1.2h is kept the temperature after being warming up to 730 DEG C；Annealing furnace 730 DEG C at a temperature of heat preservation 0.6h to 1.2h after, will anneal
Furnace is warming up to 740 DEG C to 760 DEG C in 0.6h to 1.2h, and 12h to 13.5h is kept the temperature after being warming up to 740 DEG C to 760 DEG C.
6. a kind of processing technology of high-strength steel strip according to claim 1 or 4 or 5, which is characterized in that spheroidizing
In, it needs to do detonation test before being heated up, it is ensured that the purity of hydrogen in ammonia destruction furnace；In entire heating and insulating process,
The difference of actual temperature value and process warm angle value is less than 15 DEG C.
7. a kind of processing technology of high-strength steel strip according to claim 1, which is characterized in that in the step 8,
Before carrying out second of longitudinal shearing slitting, the hardness of finish rolling roll bending need to be detected first with universal testing machine and hardometer, and
The acceptability limit of the hardness number of finish rolling roll bending is 75HRB to 85HRB；Metallographic detection is carried out to the finish rolling roll bending of hardness number qualification,
The finish rolling roll bending of metallographic detection also qualification is put on small banding machine.
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| CN106670743B (en) * | 2016-12-14 | 2019-06-11 | 安徽楚江特钢有限公司 | A kind of manufacturing method of precision gas spring straight seam welded pipe |
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| CN112122381B (en) * | 2020-09-11 | 2022-09-06 | 铭尔金属(苏州)有限公司 | Aluminum coiled strip leveling process |
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| CN113481354A (en) * | 2021-07-05 | 2021-10-08 | 大连环新精密特钢股份有限公司 | Ultrahigh-speed continuous isothermal spheroidizing annealing method and device for carbon steel |
| CN113637831A (en) * | 2021-07-22 | 2021-11-12 | 湖北大帆金属制品有限公司 | Processing technology of SAPH440 high-strength structural steel |
| CN113621773A (en) * | 2021-07-22 | 2021-11-09 | 湖北大帆金属制品有限公司 | SK85 carbon tool steel |
| CN114182070A (en) * | 2021-12-02 | 2022-03-15 | 南京钢铁股份有限公司 | Spheroidizing annealing method for carbon tool steel roller bottom type annealing furnace for automobile |
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| Publication number | Publication date |
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| CN106086350A (en) | 2016-11-09 |
| CN108193028A (en) | 2018-06-22 |
| CN108165709B (en) | 2019-12-27 |
| CN108251610A (en) | 2018-07-06 |
| CN108193028B (en) | 2020-07-03 |
| CN108251610B (en) | 2020-02-18 |
| CN108239693A (en) | 2018-07-03 |
| CN108165709A (en) | 2018-06-15 |
| CN106086350B (en) | 2018-02-16 |
| CN108239693B (en) | 2019-12-27 |
| CN108220548A (en) | 2018-06-29 |
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