CN107699801A - A kind of core rod ZW616 of plastic die steel containing V and preparation method thereof - Google Patents
A kind of core rod ZW616 of plastic die steel containing V and preparation method thereof Download PDFInfo
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- CN107699801A CN107699801A CN201710821635.1A CN201710821635A CN107699801A CN 107699801 A CN107699801 A CN 107699801A CN 201710821635 A CN201710821635 A CN 201710821635A CN 107699801 A CN107699801 A CN 107699801A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
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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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
- C21D1/25—Hardening, combined with annealing between 300 degrees Celsius and 600 degrees Celsius, i.e. heat refining ("Vergüten")
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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
- C21D8/005—Modifying the physical properties by deformation combined with, or followed by, heat treatment of ferrous alloys
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
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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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/002—Bainite
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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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/008—Martensite
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Abstract
The present invention relates to core rod containing V plastic die steel ZW616 and preparation technology.Mo contents are lifted, add V, Ni element, content is calculated as by mass percentage：C：0.2~0.40%, Si：0.2~0.8%, Mn：1.0~1.6%, Cr：1.4~2.1%, Mo：0.2~0.5%, V：0.05~0.12%, P≤0.010%, S≤0.010%, Ni：0.2~0.4%, Cu≤0.25%, O≤20ppm, N：60~100ppm, H≤1.5ppm, surplus Fe.Using numerical simulation temperature techniques, forging high-temperature diffusion technique, weight technique is pulled out, be heat-treated Grain Refinement, quenched empty alternately using water, double tempering technique.Improved by mentioned component and method and realize that product specification is opened up greatly, crystal grain refinement, cost economy, uniformity of hardness lifting, performance optimization.
Description
Technical field
The invention belongs to steel alloy field, and in particular to a kind of core rod plastic die steel ZW616 and preparation method thereof.
Background technology
Plastic mould product made from steel is extensive and dosage is big with its use range, has very important ground in mould steel industry
Position, it is mainly used in household electrical appliances and other daily necessitiess 1.2311 (German Ge Lizi steel grades), with plastic products demand
Lifting, plastic die steel product quality also need it is corresponding regenerate, it is necessary to it is a kind of on year-on-year basis for processing characteristics preferably, uniformity of hardness compared with
Height, the plastic mould product made from steel that grain size more refines and cost control is relatively more economical.
The content of the invention
The present invention is by proposing a kind of plastic die steel and preparation method thereof.Steel of the present invention solves to meet the market requirement
The above-mentioned Current Situation that presently, there are and design, in composition proportion lifted Mo contents, add V element, add Ni elements, optimization
Production technology, realize that product specification is widened, crystal grain refinement uniformity of hardness lifting, performance optimization, is carrying up to 7~9 grades
On the premise of rising product performance, the reduction of cost is realized.
Realized especially by following technological means：
A kind of core rod plastic die steel containing V, content is calculated as the plastic die steel by mass percentage：C：0.2~
0.40%, Si：0.2~0.8%, Mn：1.0~1.6%, Cr：1.4~2.1%, Mo：0.2~0.5%, V：0.05~
0.12%, P≤0.010%, S≤0.010%, Ni：0.2~0.4%, Cu≤0.25%, O≤20ppm, N：60~100ppm, H
≤ 1.5ppm, surplus are Fe and inevitable impurity；
For the core rod with the microstructure of the plastic die steel containing V, 50~70mm of quenching structure top layer is martensitic structure,
At thickness 1/4 and core is bainite structure, is tempered sorbite tissue after high tempering, grain size is up to 7~9 grades.
The preparation method of above-mentioned core rod plastic die steel containing V, it is characterised in that comprise the following steps：
(1) prepare before forging：Pass through blast furnace~converter~LF stoves~VD stove flows by foregoing plastics mould steel constituent content
Steel ingot is molded into after smelting, and wherein will be pressed impurity content：Pb≤0.010%, Sn≤0.010%, As≤0.010%, Sb≤
0.010%, Bi≤0.010%, the requirement of Cu≤0.25% are controlled；Steel ingot is heated up with 80-100 DEG C/h speed before forging
It is incubated to 300-600 DEG C, soaking time is calculated by 0.1~0.3min/mm and then is warming up to 69~90 DEG C/h speed
700-900 DEG C is incubated, and soaking time is calculated by 0.3~0.5min/mm and then is warming up to 90~110 DEG C/h speed
1200-1250 DEG C is incubated, and soaking time is calculated by 0.7~0.9min/mm；Come out of the stove pressing tongs handle, and a Upsetting are incubated after terminating
One draw is into middle base, and middle base enters stove progress High temperature diffusion and homogenized, and holding temperature is 1250 ± 5 DEG C, and soaking time presses 2-
4min/mm is calculated；
(2) forge：The intermediate billet temperature retaining that step (1) obtains come out of the stove after terminating carry out Upsetting pull out technique, total forging ratio >=6, pull out
Passage weight technique is used in growth process：That is draught per pass 20~30%, starting forging temperature >=1100 DEG C in forging process, eventually
Forge temperature >=850 DEG C；
(3) air cooling after forging：The steel moald-cavity of step (2) forging gained is positioned over air cooling zone, is air-cooled to 400~600 DEG C, sky
Keep putting spacing ＞ 1.5m between each steel moald-cavity during cold；
(4) crystal grain refinement is handled：The steel moald-cavity that step (3) hollow cold is finished loads 400~550 DEG C of heat-treatment furnace
In, 3~6h is incubated, is then warming up to 650 ± 5 DEG C with 58~62 DEG C/h speed, soaking time is calculated by 0.38~0.42/mm,
Then 890-900 DEG C is warming up to 78~82 DEG C/h speed, soaking time is 1.3~1.6min/mm, and insulation is come out of the stove after terminating
Air-cooled to 350~400 DEG C, module is fitted into 400~550 DEG C of stoves to be expected, is incubated 3~6h, heated up with 58~62 DEG C/h speed
To 730~750 DEG C, 2.8~3.3min/mm is incubated, module is come out of the stove and is air-cooled to 350~400 DEG C；
(5) hydrogen is expanded：The steel moald-cavity that step (4) obtains is transferred to 350 ± 2 DEG C of heat-treatment furnace, with 58~62 DEG C/h speed
Rate is warming up to 620~660 DEG C, is incubated as 7~9min/mm；
(6) it is quenched：Quenched heating：Module in step (5) is warming up to 870~910 with 50~60 DEG C/h heating rate
DEG C it is incubated, soaking time is 1.3~1.6min/mm, and insulation is come out of the stove after terminating and cooled down using water sky over-over mode, is had
Body is：Enter water after being air-cooled to 700~760 DEG C, be cooled to water outlet after 648~652 DEG C of core, enter water after 118~122s of air cooling, it is cold
To 448~452 DEG C of water outlets of core, water, water cooling to 348~352 DEG C of water outlets of core, 88~92s of air cooling are entered after 118~122s of air cooling
After enter water, water cooling is to 198~202 DEG C of water outlets of core, and shove charge is once tempered immediately after water outlet；
(7) once it is tempered：Step (6) obtain steel moald-cavity load tempering furnace, at a temperature of 200~300 DEG C be incubated 15~
20h, it is incubated after being then warming up to 550~600 DEG C with 40 DEG C/h speed, soaking time is 2.8~3.2min/mm, is protected
Temperature is come out of the stove after terminating and is air-cooled to room temperature；
(8) double tempering：The steel moald-cavity that step (7) obtains enters stove under conditions of room temperature, then with 38~42 DEG C/h's
Speed is incubated after being warming up to 540~590 DEG C, and soaking time is 2.8~3.2min/mm, and insulation is come out of the stove after terminating and is air-cooled to
Room temperature, obtain core rod plastic die steel containing V.
The preferred embodiment of wherein step (1) is：
(1) prepare before forging：Pass through blast furnace~converter~LF stoves~VD stove flows by foregoing plastics mould steel constituent content
Steel ingot is molded into after smelting, and wherein will be pressed impurity content：Pb≤0.010%, Sn≤0.010%, As≤0.010%, Sb≤
0.010%, Bi≤0.010%, the requirement of Cu≤0.25% are controlled；By steel ingot with 80~100 DEG C/h speed liters before forging
Warm to 300~600 DEG C are incubated, and soaking time is calculated by 0.2min/mm and then is warming up to 700~900 with 80 DEG C/h speed
DEG C it is incubated, soaking time is calculated by 0.4min/mm and then is warming up to 1200~1250 DEG C with 100 DEG C/h speed and protected
Temperature, soaking time are calculated by 0.8min/mm；Pressing tongs handle of coming out of the stove is incubated after terminating, and the draws of a Upsetting mono- enter into middle base, middle base
Stove carries out High temperature diffusion and homogenized, and holding temperature is 1250 ± 5 DEG C, and soaking time is calculated by 2~4min/mm.
The preferred embodiment of step (4) is：
(4) crystal grain refinement is handled：The steel moald-cavity that step (3) hollow cold is finished loads 400~550 DEG C of heat-treatment furnace
In, 3~6h is incubated, is then warming up to 650 DEG C with 60 DEG C/h speed, soaking time is calculated by 0.4/mm, then with 80 DEG C/h's
Speed is warming up to 890~900 DEG C, soaking time 1.5min/mm, and insulation is come out of the stove air-cooled to 350~400 DEG C after terminating, by mould
It is packaged enter 400~550 DEG C of stoves to be expected in, be incubated 3~6h, be warming up to 730~750 DEG C with 60 DEG C/h speed, be incubated 3min/mm,
Module is come out of the stove and is air-cooled to 350~400 DEG C.
The preferred embodiment of step (6)~(8) is：
(6) it is quenched：Quenched heating：Module in step (5) is warming up to 870~910 with 50~60 DEG C/h heating rate
DEG C it is incubated, soaking time 1.5min/mm, insulation is come out of the stove after terminating and cooled down using water sky over-over mode, is specially：
Enter water after being air-cooled to 700~760 DEG C, be cooled to water outlet after 650 DEG C of core, enter water after air cooling 120s, be cooled to 450 DEG C of core and go out
Water, enters water after air cooling 120s, water cooling to 350 DEG C of water outlets of core, enters water, water cooling to 200 DEG C of water outlets of core, water outlet after air cooling 90s
Shove charge is once tempered immediately afterwards.
(7) once it is tempered：Step (6) obtain steel moald-cavity load tempering furnace, at a temperature of 200~300 DEG C be incubated 15~
20h, it is incubated after being then warming up to 550~600 DEG C with 40 DEG C/h speed, soaking time 3min/mm, after insulation terminates
Come out of the stove and be air-cooled to room temperature.
(8) double tempering：The steel moald-cavity that step (7) obtains enters stove under conditions of room temperature, then with 40 DEG C/h speed
It is incubated after being warming up to 540~590 DEG C, soaking time 3min/mm, insulation is come out of the stove after terminating and is air-cooled to room temperature, obtains mould
Core plastic die steel containing V.
A kind of purposes of core rod plastic die steel containing V, the core rod are used for Bulk plastic mould with plastic die steel containing V
Core rod steel, and the core rod uses described core rod to be prepared with plastic die steel containing V and/or its preparation method with steel.
" surface layer " in the present invention is below steel moald-cavity top layer to top layer at 1mm, and " at thickness 1/4 " is top layer to core
Between distance midpoint 0.5mm each up and down at, " core " be steel moald-cavity centre most midpoint 0.5mm each up and down
Place.
The ZW616 of the present invention is the trade mark title of steel of the present invention.
Implication representated by the min/mm of the present invention is the number of minutes for needing to be incubated per mm of thickness, i.e., according to thickness not
Together, soaking time is also different, and the unit of thickness is millimeter.
Effect of the invention is that：
1, in terms of preparation technology：Forge Heating, crystal grain refinement processing and the process such as quenched carry out mould using DEFORM
Intend heat treatment, while attached idol during produced on-site, realize and heat treatment process temperature is precisely controlled, and then ensure product quality.
Forging high-temperature diffusion homogenizes, and non-uniform components fully improve steel ingot internal segregation.Draw out, particularly last fire pulling are adopted
With passage weight technique, crystal grain thinning while defect is smelted in fully broken interior tissue and soldering.Unique temper water is empty to be handed over
The cooling technique replaced, while fully evading cracking risk according to the cooling curve of overcooling austenite, realize cooling speed faster
Rate, and then realize module hardening depth as thick as possible.In tempering process, with reference to martensite in drawing process and bainite
Decomposition principle, its enough tempering time is designed, while to ensure that the product tempering fully more uniform processing characteristics of tissue is more preferable,
Produced using double tempering technique.
2, in terms of alloy composition and microstructure：In terms of crystal grain thinning, by adding appropriate V element, with reference to crystal grain
Process for refining, grain size are refined to 7~9 grades.Uniformity aspect：Composition is uniform, even tissue, the good (temperature of organization type
It is higher, obtain preferable tempered sorbite tissue) and tempering is fully, hardness is uniform, obtains good processing characteristics.Obtain certain
Hardness, steel belt roof bolt temperature more traditional 1.2311 of the present invention improve 40~60 DEG C, and this causes material in follow-up mould working process
On it is safer.Steel specification of the present invention is most thick to 800mm (general maximum gauge is 400~500mm in the industry), and core hardness >=
30HRC.Cost-effective, for steel more traditional 1.2311 of the present invention, its cost can be slightly higher, but the lifting of quality can increase
Life of product, lift the quality of follow-up plastic products.Cost：For the 1.2738 of a class high compared to 1.2311, steel of the present invention
Part small dimension 1.2738 can be substituted completely, substantially reduce cost.
3, Mo contents are lifted, add V element, add Ni elements.Vanadium and carbon, nitrogen have extremely strong affinity, form phase therewith
The stable compound answered, Dispersed precipitate, the superheated susceptivity of steel is reduced, crystal grain thinning uniform formation, can additionally improve steel
Intensity and yield ratio, while the temper resistance of material can be also obviously improved, part is tempered at relatively high temperatures, so as to more
Effectively eliminate (or reduction) residual stress.Mo elements can make the part compared with big cross section quench depth, through hardening, can also improve resisting back for steel
Fire or temper resistance, effectively improve the toughness of material.Ni elements lift quenching degree, lift the intensity of steel, at the same to toughness,
The infringement of other performances of plasticity is small compared with the influence of other alloying elements.The synergy of above-mentioned several elements, quenching degree is lifted, is carried
Anti-temper resistance is risen, crystal grain thinning uniform formation, acquisition specification is larger and quality is preferable while cost of material control is relatively low
Horizontal plastic mould steel part of the present invention.
Brief description of the drawings
Fig. 1 is 500 times of metallographic structure photos of finished steel surface layer of the present invention.
Fig. 2 is 500 times of metallographic structure photos at finished steel thickness 1/4 of the present invention.
Fig. 3 is 500 times of metallographic structure photos of finished steel core of the present invention.
Embodiment
Embodiment 1
A kind of core rod plastic die steel containing V, it is characterised in that plastic die steel content meter by mass percentage
For：C：0.25%, Si：0.3%, Mn：1.2%, Cr：1.6%, Mo：0.28%, V：0.05%, P≤0.010%, S≤
0.010%, Ni：0.2%, Cu≤0.25%, O≤20ppm, N：60~100ppm, H≤1.5ppm, surplus are Fe and can not kept away
The impurity exempted from；The present embodiment produces module 2, and specification is respectively：Thickness 700mm* width 1240mm, thickness 600mm* width
1500mm, its preparation technology comprise the following steps：
(1) prepare before forging：Pass through blast furnace~converter~LF stoves~VD stove flows by above-mentioned plastic die steel constituent content
Steel ingot is molded into after smelting.Steel ingot weight 28t, average diameter 1350mm used, are heated up steel ingot with 100 DEG C/h speed before forging
To 600 DEG C of insulation 4.5h, 900 DEG C of soaking times are warming up to 80 DEG C/h speed it are warming up to 1220 DEG C by 9h, with 100 DEG C/h speed
It is incubated 18h.Pressing tongs handle of coming out of the stove is incubated after terminating, and a Upsetting mono- pulls into middle base, specification 900*1400mm, middle base enters stove and entered
Row High temperature diffusion homogenizes, and temperature is 1250 DEG C of insulation 45h.
(2) forge：Middle base High temperature diffusion homogenizes to come out of the stove after insulation terminates and carries out two Upsetting two and pull out or three Upsetting tri- are pulled out, always
Forging ratio >=6, passage weight technique is used during pulling：Draught per pass 20~30%, starting forging temperature in forging process
>=1100 DEG C, final forging temperature >=850 DEG C.
(3) air cooling after forging：The module of forging gained in step (2) is placed into air cooling zone and is air-cooled to 600 DEG C, in process air cooler
Module puts spacing ＞ 1.5m.
(4) crystal grain refinement is handled：The steel moald-cavity that step (3) hollow cold is finished loads 400~550 DEG C of heat-treatment furnace
In, 3~6h is incubated, is then warming up to 650 DEG C with 60 DEG C/h speed, 4.7h is incubated, is then warming up to 890 with 80 DEG C/h speed
~900 DEG C, soaking time 17.5h, insulation is come out of the stove air-cooled to 350~400 DEG C after terminating, and module loading is treated for 400~550 DEG C
Expect in stove, be incubated 3~6h, be warming up to 730~750 DEG C with 60 DEG C/h speed, be incubated 35h, module, which is come out of the stove, is air-cooled to 350~400
℃。
(5) hydrogen is expanded：The steel moald-cavity that step (4) obtains is transferred to 350 DEG C of heat-treatment furnace, is warming up to 60 DEG C/h speed
620~660 DEG C, it is incubated as 94h.
(6) it is quenched：Quenched heating：Module in step (5) is warming up to 870~910 with 50~60 DEG C/h heating rate
DEG C it is incubated, is incubated 17.5h, insulation is come out of the stove after terminating and cooled down using water sky over-over mode, is specially：It is air-cooled to 700
Enter water after~760 DEG C, be cooled to water outlet after 650 DEG C of core, enter water after air cooling 120s, be cooled to 450 DEG C of water outlets of core, air cooling 120s
After enter water, water cooling to 350 DEG C of water outlets of core, enter water after air cooling 90s, water cooling is to 200 DEG C of water outlets of core, and shove charge is entered immediately after water outlet
Row is once tempered.
(7) once it is tempered：Step (6) obtain steel moald-cavity load tempering furnace, at a temperature of 200~300 DEG C be incubated 15~
20h, it is incubated after being then warming up to 590 DEG C with 40 DEG C/h speed, soaking time 35h, is incubated after terminating air cooling of coming out of the stove
To room temperature.
(8) double tempering：The steel moald-cavity that step (7) obtains enters stove under conditions of room temperature, then with 40 DEG C/h speed
It is incubated after being warming up to 580 DEG C, soaking time 35h, insulation is come out of the stove after terminating and is air-cooled to room temperature, is obtained core rod and is used containing V modelings
Expect mould steel.
Examine：9 grades of grain size, uniformity of hardness ± 1.5HRC, core hardness >=30HRC.
Embodiment 2
A kind of core rod plastic die steel containing V, it is characterised in that plastic die steel content meter by mass percentage
For：C：0.3%, Si：0.4%, Mn：1.3%, Cr：1.8%, Mo：0.35%, V：0.08%, P≤0.010%, S≤
0.010%, Ni：0.3%, Cu≤0.25%, O≤20ppm, N：60~100ppm, H≤1.5ppm, surplus are Fe and can not kept away
The impurity exempted from；The present embodiment produces module 2, and specification is respectively：Thickness 710mm* width 1500mm, thickness 720* width
1500mm, its preparation technology comprise the following steps：
(1) prepare before forging：Pass through blast furnace~converter~LF stoves~VD stove flows by above-mentioned plastic die steel constituent content
Steel ingot is molded into after smelting.Steel ingot ingot weight 35t, average diameter 1400mm, by steel ingot with 80~100 DEG C/h speed liters before forging
Temperature is incubated 4.5h to 500 DEG C, is warming up to 800 DEG C of insulation 9.3h with 80 DEG C/h speed, 1235 DEG C are warming up to 100 DEG C/h speed
It is incubated 18.7h.Pressing tongs handle of coming out of the stove is incubated after terminating, and a Upsetting mono- pulls into middle base, middle base specification is 1000*1400mm, in
Between base enter stove carry out High temperature diffusion homogenize, temperature be 1250 DEG C insulation 67h.
(2) forge：Middle base High temperature diffusion homogenizes to come out of the stove after insulation terminates and carries out two Upsetting two and pull out or three Upsetting tri- are pulled out, always
Forging ratio >=6, passage weight technique is used during pulling：Draught per pass 25%, starting forging temperature in forging process >=
1100 DEG C, final forging temperature >=850 DEG C.
(3) air cooling after forging：The module of forging gained in step (2) is placed into air cooling zone and is air-cooled to 500 DEG C, in process air cooler
Module puts spacing ＞ 1.5m.
(4) crystal grain refinement is handled：The steel moald-cavity that step (3) hollow cold is finished loads 400~550 DEG C of heat-treatment furnace
In, 3~6h is incubated, is then warming up to 650 DEG C, soaking time 4.8h with 60 DEG C/h speed, is then heated up with 80 DEG C/h speed
To 890~900 DEG C, soaking time 18h, insulation is come out of the stove air-cooled to 350~400 DEG C after terminating, and module is loaded into 400~550
In DEG C stove to be expected, 3~6h is incubated, 730~750 DEG C is warming up to 60 DEG C/h speed, is incubated 36h, module is come out of the stove and is air-cooled to 350
~400 DEG C.
(5) hydrogen is expanded：The steel moald-cavity that step (4) obtains is transferred to 350 DEG C of heat-treatment furnace, is warming up to 60 DEG C/h speed
620~660 DEG C, it is incubated 96h.
(6) it is quenched：Quenched heating：Module in step (5) is warming up to 870~910 with 50~60 DEG C/h heating rate
DEG C it is incubated, soaking time 18h, insulation is come out of the stove after terminating and cooled down using water sky over-over mode, is specially：It is air-cooled to
Enter water after 700~760 DEG C, be cooled to water outlet after 650 DEG C of core, enter water after air cooling 120s, be cooled to 450 DEG C of water outlets of core, air cooling
Enter water after 120s, water cooling to 350 DEG C of water outlets of core, enter water after air cooling 90s, water cooling fills immediately to 200 DEG C of water outlets of core after water outlet
Stove is once tempered.
(7) once it is tempered：Step (6) obtain steel moald-cavity load tempering furnace, at a temperature of 200~300 DEG C be incubated 15~
20h, it is incubated after being then warming up to 580 DEG C with 40 DEG C/h speed, soaking time 36h, is incubated after terminating air cooling of coming out of the stove
To room temperature.
(8) double tempering：The steel moald-cavity that step (7) obtains enters stove under conditions of room temperature, then with 40 DEG C/h speed
It is incubated after being warming up to 570 DEG C, soaking time 36h, insulation is come out of the stove after terminating and is air-cooled to room temperature, is obtained core rod and is used containing V modelings
Expect mould steel.
Examine：8 grades of grain size, uniformity of hardness ± 1.5HRC, core hardness >=30HRC.
Embodiment 3
A kind of core rod plastic die steel containing V, it is characterised in that plastic die steel content meter by mass percentage
For：C：0.35%, Si：0.5%, Mn：1.4%, Cr：2.0%, Mo：0.45%, V：0.10%, P≤0.010%, S≤
0.010%, Ni：0.35%, Cu≤0.25%, O≤20ppm, N：60~100ppm, H≤1.5ppm, surplus are Fe and can not kept away
The impurity exempted from；The present embodiment produces 2 specifications of module, is specially：Thickness 730mm*1500mm and 750*1500mm, it prepares work
Skill comprises the following steps：
(1) prepare before forging：Pass through blast furnace~converter~LF stoves~VD stove flows by above-mentioned plastic die steel constituent content
Steel ingot is molded into after smelting, and wherein impurity and gas content will be controlled by the requirement of table 1.Steel ingot ingot weight 37t, average diameter
For 1400mm.Steel ingot is warming up to 500 DEG C with 80 DEG C/h speed before forging, soaking time is calculated, with 80 DEG C/h speed by 4.7h
It is warming up to 700 DEG C of insulation 9.3h, 1200~1250 DEG C of insulation 18.7h is warming up to 100 DEG C/h speed.Insulation goes out furnace pressure after terminating
Handle is clamped, and a Upsetting mono- pulls into middle base, middle base specification is 1000*1400mm, and middle base enters stove progress High temperature diffusion and homogenized,
Temperature is 1250 DEG C of insulation 66.7h.
(2) forge：Middle base High temperature diffusion homogenizes to come out of the stove after insulation terminates and carries out two Upsetting two and pull out or three Upsetting tri- are pulled out, always
Forging ratio >=6, passage weight technique is used during pulling：Draught per pass 28%, starting forging temperature in forging process >=
1100 DEG C, final forging temperature >=850 DEG C.
(3) air cooling after forging：The module of forging gained in step (2) is placed into air cooling zone and is air-cooled to 400 DEG C, in process air cooler
Module puts spacing ＞ 1.5m.
(4) crystal grain refinement is handled：The steel moald-cavity that step (3) hollow cold is finished loads 400~550 DEG C of heat-treatment furnace
In, 3~6h is incubated, then 650 DEG C is warming up to 60 DEG C/h speed, soaking time 5h, is then warming up to 80 DEG C/h speed
890~900 DEG C, soaking time 18.8h, insulation is come out of the stove air-cooled to 350~400 DEG C after terminating, and module is loaded into 400~550
In DEG C stove to be expected, 3~6h is incubated, 730~750 DEG C is warming up to 60 DEG C/h speed, is incubated 37.5h, module, which is come out of the stove, is air-cooled to 350
~400 DEG C.
(5) hydrogen is expanded：The steel moald-cavity that step (4) obtains is transferred to 350 DEG C of heat-treatment furnace, is warming up to 60 DEG C/h speed
620~660 DEG C, it is incubated as 100h.
(6) it is quenched：Quenched heating：Module in step (5) is warming up to 870~910 with 50~60 DEG C/h heating rate
DEG C it is incubated, soaking time 18.8h, insulation is come out of the stove after terminating and cooled down using water sky over-over mode, is specially：Air cooling
Enter water after to 700~760 DEG C, be cooled to water outlet after 650 DEG C of core, enter water after air cooling 120s, be cooled to 450 DEG C of water outlets of core, it is empty
Enter water after cold 120s, water cooling to 350 DEG C of water outlets of core enters water after air cooling 90s, water cooling to 200 DEG C of water outlets of core, after water outlet immediately
Shove charge is once tempered.
(7) once it is tempered：Step (6) obtain steel moald-cavity load tempering furnace, at a temperature of 200~300 DEG C be incubated 15~
20h, it is incubated after being then warming up to 570 DEG C with 40 DEG C/h speed, soaking time 37.5h, is incubated after terminating sky of coming out of the stove
It is cooled to room temperature.
(8) double tempering：The steel moald-cavity that step (7) obtains enters stove under conditions of room temperature, then with 40 DEG C/h speed
It is incubated after being warming up to 560 DEG C, soaking time 37.5h, insulation is come out of the stove after terminating and is air-cooled to room temperature, obtains core rod with containing V
Plastic die steel.
Examine：8 grades of grain size, uniformity of hardness ± 1.5HRC, core hardness >=30HRC.
Claims (3)
1. a kind of core rod plastic die steel containing V, it is characterised in that content is calculated as the plastic die steel by mass percentage：
C：0.2~0.40%, Si：0.2~0.8%, Mn：1.0~1.6%, Cr：1.4~2.1%, Mo：0.2~0.5%, V：0.05
~0.12%, P≤0.010%, S≤0.010%, Ni：0.2~0.4%, Cu≤0.25%, O≤20ppm, N：60~
100ppm, H≤1.5ppm, surplus are Fe and inevitable impurity；
The core rod is with the microstructure of the plastic die steel containing V, and 50~70mm of quenching structure top layer is martensitic structure, thickness
At 1/4 and core is bainite structure, is tempered sorbite tissue after high tempering, grain size is up to 7~9 grades.
2. the preparation method of the plastic die steel containing V of core rod described in claim 1, it is characterised in that comprise the following steps：
(1) prepare before forging：Core rod as described in claim 1 with the constituent content of plastic die steel containing V by blast furnace-converter-
LF stove-VD stoves flow is molded into steel ingot after smelting, and wherein will press impurity content：Pb≤0.010%, Sn≤0.010%, As≤
0.010%, Sb≤0.010%, Bi≤0.010%, the requirement of Cu≤0.25% are controlled；By steel ingot with 80-100 before forging
DEG C/h speed is warming up to 300-600 DEG C and is incubated, soaking time is calculated by 0.1~0.3min/mm and then with 69~90 DEG C/h
Speed is warming up to 700-900 DEG C and is incubated, and soaking time is calculated by 0.3~0.5min/mm and then with 90~110 DEG C/h speed
Rate is warming up to 1200-1250 DEG C and is incubated, and soaking time is calculated by 0.7~0.9min/mm；Pressing tongs of coming out of the stove is incubated after terminating
, and the draws of a Upsetting mono-, into middle base, middle base enters stove progress High temperature diffusion and homogenized, and holding temperature is 1250 ± 5 DEG C, insulation
Time is calculated by 2-4min/mm；
(2) forge：The intermediate billet temperature retaining that step (1) obtains come out of the stove after terminating carry out Upsetting pull out technique, total forging ratio >=6, pulled out
Passage weight technique is used in journey：That is draught per pass 20~30%, starting forging temperature >=1100 DEG C in forging process, finish-forging temperature
>=850 DEG C of degree；
(3) air cooling after forging：The steel moald-cavity of step (2) forging gained is positioned over air cooling zone, is air-cooled to 400~600 DEG C, air cooling mistake
Keep putting spacing ＞ 1.5m between each steel moald-cavity in journey；
(4) crystal grain refinement is handled：The steel moald-cavity that step (3) hollow cold finishes is fitted into 400~550 DEG C of heat-treatment furnace, protected
3~6h of temperature, be then warming up to 650 ± 5 DEG C with 58~62 DEG C/h speed, soaking time is calculated by 0.38~0.42/mm, then with
78~82 DEG C/h speed is warming up to 890-900 DEG C, and soaking time is 1.3~1.6min/mm, insulation terminate after come out of the stove it is air-cooled extremely
350~400 DEG C, module is fitted into 400~550 DEG C of stoves to be expected, is incubated 3~6h, 730 are warming up to 58~62 DEG C/h speed~
750 DEG C, 2.8~3.3min/mm is incubated, module is come out of the stove and is air-cooled to 350~400 DEG C；
(5) hydrogen is expanded：The steel moald-cavity that step (4) obtains is transferred to 350 ± 2 DEG C of heat-treatment furnace, with 58~62 DEG C/h speed liter
Temperature is incubated as 7~9min/mm to 620~660 DEG C；
(6) it is quenched：Quenched heating：Module in step (5) is warming up into 870~910 DEG C with 50~60 DEG C/h heating rate to enter
Row insulation, soaking time is 1.3~1.6min/mm, and insulation is come out of the stove after terminating and cooled down using water sky over-over mode, specifically
For：Enter water after being air-cooled to 700~760 DEG C, be cooled to water outlet after 648~652 DEG C of core, enter water after 118~122s of air cooling, be cooled to
448~452 DEG C of water outlets of core, enter water, water cooling to 348~352 DEG C of water outlets of core, 88~92s of air cooling after 118~122s of air cooling
Enter water after (preferably 90s), water cooling is to 198~202 DEG C of water outlets of core, and shove charge is once tempered immediately after water outlet；
(7) once it is tempered：Step (6) obtains steel moald-cavity and loads tempering furnace, and 15~20h is incubated at a temperature of 200~300 DEG C,
Then it is incubated after being warming up to 550~600 DEG C with 40 ± 2 DEG C/h speed, soaking time is 2.8~3.2min/mm, insulation
Come out of the stove after end and be air-cooled to room temperature；
(8) double tempering：The steel moald-cavity that step (7) obtains enters stove under conditions of room temperature, then with 38~42 DEG C/h speed
It is incubated after being warming up to 540~590 DEG C, soaking time is 2.8~3.2min/mm, and insulation is come out of the stove after terminating and is air-cooled to room temperature,
Obtain core rod plastic die steel containing V.
3. the purposes of a kind of core rod plastic die steel containing V, it is characterised in that core rod plastic die steel containing V is used for big
The core rod steel of plastic mould, and the core rod with steel using the plastic die steel containing V of the core rod described in claim 1 and/or
It is prepared using the preparation method of claim 2.
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| CN108866285A (en) * | 2018-09-11 | 2018-11-23 | 武钢集团襄阳重型装备材料有限公司 | A kind of heavy die block mould steel Tempering and Quenching method |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1263170A (en) * | 1999-02-12 | 2000-08-16 | 日立金属株式会社 | High-strength die steel with excellent machining property |
| CN1576382A (en) * | 2003-06-26 | 2005-02-09 | 斗山重工业株式会社 | Steel for plastic injection moulding die with excellent mechanical workability |
| CN101311293A (en) * | 2007-05-24 | 2008-11-26 | 宝山钢铁股份有限公司 | Large-scale mold module and method for manufacturing same |
| CN101476086A (en) * | 2008-01-02 | 2009-07-08 | 宝山钢铁股份有限公司 | Economic steel for plastic cavity die and manufacturing method thereof |
| CN104674134A (en) * | 2013-11-30 | 2015-06-03 | 宁波九天重型锻造有限公司 | Novel plastic die steel and preparation method thereof |
| CN105200343A (en) * | 2015-10-15 | 2015-12-30 | 芜湖市宝艺游乐科技设备有限公司 | Pre-hardened plastic die steel having high acid corrosion resistance and preparation method thereof |
-
2017
- 2017-09-04 CN CN201710821635.1A patent/CN107699801B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1263170A (en) * | 1999-02-12 | 2000-08-16 | 日立金属株式会社 | High-strength die steel with excellent machining property |
| CN1576382A (en) * | 2003-06-26 | 2005-02-09 | 斗山重工业株式会社 | Steel for plastic injection moulding die with excellent mechanical workability |
| CN101311293A (en) * | 2007-05-24 | 2008-11-26 | 宝山钢铁股份有限公司 | Large-scale mold module and method for manufacturing same |
| CN101476086A (en) * | 2008-01-02 | 2009-07-08 | 宝山钢铁股份有限公司 | Economic steel for plastic cavity die and manufacturing method thereof |
| CN104674134A (en) * | 2013-11-30 | 2015-06-03 | 宁波九天重型锻造有限公司 | Novel plastic die steel and preparation method thereof |
| CN105200343A (en) * | 2015-10-15 | 2015-12-30 | 芜湖市宝艺游乐科技设备有限公司 | Pre-hardened plastic die steel having high acid corrosion resistance and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 刘宗昌: "《金属材料工程概论》", 28 February 2007 * |
Cited By (17)
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| CN108396230A (en) * | 2018-05-24 | 2018-08-14 | 合肥汇之新机械科技有限公司 | A kind of uniform wear-resisting mould steel preparation method of case hardness |
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