CN109985904A - A kind of method and system of continuous casting and rolling production thermoforming steel - Google Patents
A kind of method and system of continuous casting and rolling production thermoforming steel Download PDFInfo
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- CN109985904A CN109985904A CN201910359492.6A CN201910359492A CN109985904A CN 109985904 A CN109985904 A CN 109985904A CN 201910359492 A CN201910359492 A CN 201910359492A CN 109985904 A CN109985904 A CN 109985904A
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- 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
- B21B1/46—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 metal immediately subsequent to continuous casting
- B21B1/466—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 metal immediately subsequent to continuous casting in a non-continuous process, i.e. the cast being cut before rolling
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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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- 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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- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Metal Rolling (AREA)
Abstract
The present invention provides a kind of method and system of continuous casting and rolling production thermoforming steel.This method comprises: continuously carrying out roughing, finish rolling, cooling, air-cooled, thermoforming processing to the slab of conticaster output, the thermoforming steel are obtained.Structure of the invention characteristics of compact layout, process flow is brief, small investment；The interface between traditional continuous casting, hot rolling and downstream process is broken, has realized that continuous casting, hot rolling are connected with the effective of downstream process；Producing line makes full use of the waste heat of slab to roll, and does not set or set less heating device；The reheating operation of thermoforming steel is eliminated, realizes energy conservation, the purpose for being finally reached simplified technique, reducing cost, improving efficiency.
Description
Technical field
The present invention relates to steel continuous casting and rolling technical fields, more particularly to a kind of continuous casting and rolling production thermoforming steel
Method and system.
Background technique
Endless rolling is realized using continuously casting and continuously rolling technology, has process compact, efficient, energy-efficient compared with traditional hot continuous rolling
Advantage, the overlength continuous casting blank temperature uniformity controlling used, constant speed rolling use constant tensile control in the process, make continuous casting and rolling
Product not only has high dimensional accuracy, also has stable mechanical performance, is to build energy-saving and environment-friendly type steel producing line
Optimization technique.But current iron and steel enterprise, various countries is confined to the production of Thin Strip Steel to the application of continuous casting and rolling.Sheet blank continuous casting connects
When rolling production Thin Strip Steel, since thickness of strips is thin, temperature drop is fast, needs to heat stove heating between roughing and finish rolling and mend temperature, it just can be with
Meet rolling temperature requirement.By taking current shortest continuous casting and rolling production line ESP as an example, unit is arranged as 3 frame roughing mills and 5 framves
Finishing mill arranges the induction heating unit that 12 groups of power are 3WM/ group between roughing mill and finishing mill, to meet rolling temperature
Degree requires.
Profile, such as square tube, round tube and angle steel, channel steel, C-type steel are widely used in building, machine-building, steel construction work
The fields such as journey, power engineering, agricultural and chemical machinery.Its product has the advantages that cross dimensions is flexible, compression strength is big, makes steel
The mechanical property of material is not fully exerted；A variety of accessories can connect into different combinations, aesthetic in appearance, also can reduce knot
Structure weight reduces engineering steel amount, thus referred to as economical and efficient steel.These profiles mainly pass through the heat of hot rolled steel plate at present
Processing and forming or the production of cold forming processing method.When being processed using thermoforming, need coils of hot-rolled steel uncoiling, aligning, reheating,
Processing and forming is carried out again, and production line need to configure a series of equipments such as steel roll opener, pinch roller, straightener and heating furnace, investment
It is at high cost；Uncoiling, threading and heating are needed when production, influence production efficiency；Process is various and discontinuous, speed of production and product
Quality is easy to be influenced by front and back process, to influence end product quality.
Summary of the invention
In view of the foregoing deficiencies of prior art, the purpose of the present invention is to provide a kind of continuous casting and rollings to produce thermoforming
The method and system of steel, the production for solving thermoforming steel in the prior art need uncoiling, threading, and process is various and not
Continuously, speed of production and product quality are easy to be influenced by front and back process, thus the problems such as influencing end product quality.
In order to achieve the above objects and other related objects, the present invention provides a kind of side of continuous casting and rolling production thermoforming steel
Method, comprising: continuously to conticaster output slab carry out roughing, finish rolling, roller repairing, thermoforming handle, obtain it is described heat at
Structural section.
Optionally, by weight, the raw material composition of the slab is as follows: C≤0.24%, Mn≤1.6%, Si≤
0.55%, P≤0.035%, S≤0.035%, surplus are Fe and inevitable impurity.
Optionally, the slab temperature of caster outlet is 1000 DEG C~1050 DEG C.
Optionally, when finish rolling, the finishing temperature of strip is not less than 800 DEG C.
Optionally, after finish rolling, by strip roller repairing to 640 DEG C~660 DEG C.
Optionally, the hot-forming temperature of strip is 580 DEG C~650 DEG C.
Optionally, before smart de-scaling, strip is heated, which is optional step, according to belt steel rolling
Thickness depending on, heated when necessary, it is not necessary to when, then do not heat.
Optionally, the belt steel temperature of finish rolling entrance is 900 DEG C~970 DEG C.
Optionally, the slab thickness of conticaster output is 70mm~110mm.
Optionally, steel strip thickness is 5mm~30mm after finish rolling.
Optionally, pulling speed of continuous casting is not less than 5.8m/min.
Optionally, before roughing, thick de-scaling first is carried out to strip.
Optionally, before finish rolling, smart de-scaling first is carried out to strip.
Optionally, after thermoforming processing, strip is cooled to 100 DEG C or less.
The present invention also provides a kind of systems of continuous casting and rolling production thermoforming steel, including conticaster, for pouring molten steel
Form base；
Roughing mills, setting is in the conticaster downstream, for carrying out roughing to strip；
Mm finishing mill unit, setting is in the roughing mills downstream, for carrying out finish rolling to strip；
After-rolling cooling system, setting is in the mm finishing mill unit downstream, for carrying out roller repairing to strip；And
Thermoforming unit, setting is in the after-rolling cooling system downstream, for carrying out thermoforming processing to strip.
Optionally, the upstream of the roughing mills is equipped with thick descaling system, for carrying out thick de-scaling to strip.
Optionally, the upstream of the mm finishing mill unit is equipped with smart descaling system, for carrying out smart de-scaling to strip.
Optionally, the downstream of the roughing mills is equipped with pendulum and cuts, for cutting off useless base.
Optionally, the downstream cut of putting is equipped with waste product push-off device, the useless base removed for collecting the pendulum shearing.
Optionally, the upstream of the smart descaling system is equipped with heating furnace, for heating to strip.
Optionally, the heating furnace is selected from induction heater.
Optionally, the heating furnace includes 0~12 group of heating unit being sequentially connected.
Optionally, the upstream of the mm finishing mill unit is equipped with the first flying shear, for cutting off strip in failure or accident.
Optionally, first flying shear is located at the downstream of the waste product push-off device.
Optionally, the second flying shear is equipped between the after-rolling cooling system and the thermoforming unit, in failure or
Strip is cut off when accident.
Optionally, the mm finishing mill unit includes the 1-2 pony roughing mills being sequentially connected.
Optionally, the mm finishing mill unit includes 3~4 finishing rolling mills being sequentially connected.
Optionally, the thermoforming unit is selected from square tube thermoforming unit, round tube thermoforming unit, angle steel thermoforming machine
At least one of group, channel steel thermoforming unit, C-type steel thermoforming unit.
Optionally, the thermoforming steel include square tube, round tube, angle steel, channel steel, C-type steel.
As described above, a kind of method and system of continuous casting and rolling production thermoforming steel of the invention, have beneficial below
Effect: the present invention, which forms a team continuous casting and rolling producing line with thermoforming steel producing line, to be connected, and is produced using the method for short route, Total continuity
Structural steel and directly thermoforming processing.Break the interface between traditional continuous casting, hot rolling and downstream process, realizes continuous casting, hot rolling
With the seamless connection of downstream process；Breaching continuous casting and rolling can be only applied to the tradition of Thin Strip Steel production, for producing think gauge
General carbon structural steel；Compared with ESP production line, since belt steel product specification is thicker, the total reduction of slab to product reduces, can
To reduce milling train quantity at least 1 frame roughing mill and 1 frame finishing mill, so as to shorten the length of continuous casting and rolling production line；Due to production
Line length shortens, and the thermal loss of steel band is reduced, and slab waste heat can be made full use of to roll, do not set or set less heating device；Cancel
The reheating operation of thermoforming steel, realizes energy-saving, has been finally reached simplified technique, has reduced cost, improves efficiency, green
The purpose of manufacture.
Detailed description of the invention
Fig. 1 is the production system schematic diagram of the embodiment of the present invention 1.
Fig. 2 is the production system schematic diagram of the embodiment of the present invention 2.
Number explanation:
1-conticaster
The thick descaling device of 2-high pressure waters
3-roughing mills
4-pendulum are cut
5-waste product push-off devices
6-the first flying shear
7-induction heaters
8-high pressure crystal's descaling devices
9-mm finishing mill units
10-roller repairing devices
11-the second flying shear
12-thermoforming units
Specific embodiment
Illustrate embodiments of the present invention below by way of specific specific example, those skilled in the art can be by this specification
Other advantages and efficacy of the present invention can be easily understood for disclosed content.The present invention can also pass through in addition different specific realities
The mode of applying is embodied or practiced, the various details in this specification can also based on different viewpoints and application, without departing from
Various modifications or alterations are carried out under spirit of the invention.
In order to reduce the production cost of thermoforming steel, production efficiency is improved, product quality and stability are improved, is realized green
Color, stabilization, continuous, reliable industrialized production, the invention proposes a kind of works of novel continuous casting rolling production thermoforming steel
Skill arrangement and production method, it is intended to break upstream and downstream process interface, reduce producing line investment, make full use of slab waste heat, subtract
Energy consumption is heated less, improves production efficiency.
Thermoforming machine of the invention include but is not limited to from square tube thermoforming unit, round tube thermoforming unit, angle steel heat at
Type unit, channel steel thermoforming unit, C-type steel thermoforming unit etc..
Thermoforming steel produced by the invention include but is not limited to square tube, round tube, angle steel, channel steel, C-type steel etc..
Embodiment 1
In the present embodiment, thermoforming steel are produced using short route, completely continuous manufacturing method.
As shown in Figure 1, production system includes conticaster 1, the thick descaling device 2 of high pressure water, roughing mills 3, puts and cut 4, waste product
Push-off device 5, the first flying shear 6 (the present embodiment is rotary drum flying shear), induction heater 7, high pressure crystal descaling device 8, finishing mill
Group 9, roller repairing device 10, the second flying shear 11, thermoforming unit 12, each device are sequentially connected with.
By mass percentage, the chemical component of thermoforming steel raw material are as follows: C 0.12%, Mn 0.28%, Si
0.1%, P 0.012%, S 0.005%, Als 0.022%, surplus are Fe and impurity.
The molten steel of above-mentioned composition is cast into base in conticaster 1, continuous casting stablizes casting speed control in 5.8m/min, continuous casting billet
Thickness 92mm, continuous casting billet width 1450mm.Continuous casting billet rolls after the thick de-scaling of the high pressure water of about 20MPa into 1 frame roughing mill
Then system passes through the induction heating stove heating being made of 6 groups of (power is 3.0~3.5MW/ group) induction heating units, using
About 20MPa high pressure crystal's de-scaling is rolled by 3 frame finishing mills, and it is 68% that finish rolling, which adds up reduction ratio,.For the power for meeting hot-strip
Performance is learned, and avoids its " blue shortness " temperature range, controls strip at roller repairing section (i.e. roller repairing device 10) after finish rolling
640 DEG C~660 DEG C are cooled to, subsequently into thermoforming unit 12 and in 580 DEG C~630 DEG C progress thermoforming processing, thermoforming
Length cutting is carried out further according to product specification after the completion.
The continuous casting and rolling process for production parameter list of 1 embodiment 1 of table
Equipment between roughing and finish rolling, pendulum cuts 4 and pours time period, the useless base of head and tail for cutting off a continuous casting, and passes through
Waste product push-off device 5 is collected；Induction heater 7 is used to compensate the temperature of intermediate base, to guarantee entry temperature at finishing；First flying shear
6 are not using during normal production, but under endless rolling mode, when induction heating later process failure or accident,
It cuts off for intermediate base, is removed rapidly convenient for waste material.
The second flying shear 11 after roller repairing is under endless rolling mode, when thermoforming process failure or accident, strip
Cutting, remove rapidly convenient for waste material, do not used under normal production model.
Embodiment 2
In the present embodiment, thermoforming steel are produced using short route, completely continuous manufacturing method.
As shown in Fig. 2, production system includes conticaster 1, the thick descaling device 2 of high pressure water, roughing mills 3, puts and cut 4, waste product
Push-off device 5, the first flying shear 6 (the present embodiment is rotary drum flying shear), high pressure crystal descaling device 8, mm finishing mill unit 9, roller repairing
Device 10, the second flying shear 11, thermoforming unit 12, each device sequence connection.
By mass percentage, the chemical component of thermoforming steel raw material are as follows: C 0.15%, Mn 1.2%, Si
0.16%, P 0.015%, S 0.009%, N 0.01%, Als 0.015%, surplus are Fe and impurity.
The molten steel of above-mentioned composition is cast into base in conticaster 1, continuous casting stablizes pulling rate 8.3m/min, thickness of strand
95mm, continuous casting billet width 1450mm.Continuous casting billet rolls after the thick de-scaling of the high pressure water of about 20MPa into 1 frame roughing mill, then
It by about 20MPa high pressure crystal's de-scaling, is rolled by 3 frame finishing mills, it is 65.4% that finish rolling, which adds up reduction ratio,.To meet hot-rolled strip
The mechanical property of steel, and avoid its " blue shortness " temperature range, after finish rolling by strip the control of roller repairing section be cooled to 640 DEG C~
660 DEG C, subsequently into thermoforming unit and in 580 DEG C~630 DEG C progress thermoforming processing, thermoforming is after the completion further according to product
Specification carries out length cutting.
The continuous casting and rolling process for production parameter list of 2 embodiment 2 of table
| Position | Continuous casting outlet | Roughing outlet | Smart de-scaling outlet | Finish rolling outlet | Roller repairing |
| Temperature (DEG C) | 1000~1020 | 1000~1020 | 910~930 | 820~840 | 640~660 |
| Thickness (mm) | 95 | 52 | 52 | 18 | 18 |
| Speed (m/s) | 0.138 | 0.252 | 0.252 | 0.728 | 0.728 |
Equipment between roughing and finish rolling, pendulum cuts 4 and pours time period, the useless base of head and tail for cutting off a continuous casting, and passes through
Waste product push-off device is collected；First flying shear 6 is not using during normal production, but under endless rolling mode, when induction heating with
Rear process breaks down or when accident, cuts off for intermediate base, removes rapidly convenient for waste material.
The second flying shear 11 after roller repairing is under endless rolling mode, when thermoforming process failure or accident, strip
Cutting, remove rapidly convenient for waste material, do not used under normal production model.
In conclusion the invention proposes a kind of method and system of novel continuous casting rolling production thermoforming steel, knot
Structure characteristics of compact layout, process flow is brief, small investment；The interface between traditional continuous casting, hot rolling and downstream process is broken, the company of realization
Casting, hot rolling are connected with the effective of downstream process；Producing line makes full use of the waste heat of slab to roll, and does not set or set less heating device；
The reheating operation of thermoforming steel is eliminated, realizes energy conservation, the purpose for being finally reached simplified technique, reducing cost, improving efficiency.
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.It is any ripe
The personage for knowing this technology all without departing from the spirit and scope of the present invention, carries out modifications and changes to above-described embodiment.Cause
This, institute is complete without departing from the spirit and technical ideas disclosed in the present invention by those of ordinary skill in the art such as
At all equivalent modifications or change, should be covered by the claims of the present invention.
Claims (10)
1. a kind of method of continuous casting and rolling production thermoforming steel characterized by comprising continuously to the slab of conticaster output
Roughing, finish rolling, cooling, air-cooled, thermoforming processing are carried out, the thermoforming steel are obtained.
2. according to the method described in claim 1, it is characterized by: by weight, the raw material composition of the slab is as follows: C≤
0.24%, Mn≤1.6%, Si≤0.55%, P≤0.035%, S≤0.035%, surplus are Fe and inevitable impurity.
3. according to the method described in claim 1, it is characterized by: the slab temperature of caster outlet is 1000 DEG C~1050
℃。
4. according to the method described in claim 1, it is characterized by: the finishing temperature of strip is not less than 800 DEG C when finish rolling.
5. according to the method described in claim 1, it is characterized by: strip is cooled to 640 DEG C~660 DEG C after finish rolling.
6. according to the method described in claim 1, it is characterized by: the hot-forming temperature of strip is 580 DEG C~650 DEG C.
7. according to the method described in claim 1, it is characterized by: being heated before finish rolling to strip.
8. according to the method described in claim 1, it is characterized by: the belt steel temperature of finish rolling entrance is 900 DEG C~970 DEG C.
9. according to the method described in claim 1, it is characterized by: the slab thickness of conticaster output is 70mm~110mm；
And/or steel strip thickness is 5mm~30mm after finish rolling；
And/or pulling speed of continuous casting is not less than 5.8m/min；
And/or before roughing, thick de-scaling first is carried out to strip；
And/or before finish rolling, smart de-scaling first is carried out to strip.
10. a kind of system of continuous casting and rolling production thermoforming steel characterized by comprising conticaster is used for pouring molten steel
At base；
Roughing mills, setting is in the conticaster downstream, for carrying out roughing to strip；
Mm finishing mill unit, setting is in the roughing mills downstream, for carrying out finish rolling to strip；
After-rolling cooling system, setting is in the mm finishing mill unit downstream, for carrying out roller repairing to strip；And
Thermoforming unit, setting is in the after-rolling cooling system downstream, for carrying out thermoforming processing to strip.
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Cited By (1)
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