CN104762460B - Rolling and deep-processing short-process integrated manufacturing method of high-strength steel automobile sheet - Google Patents
Rolling and deep-processing short-process integrated manufacturing method of high-strength steel automobile sheet Download PDFInfo
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- CN104762460B CN104762460B CN201510108779.3A CN201510108779A CN104762460B CN 104762460 B CN104762460 B CN 104762460B CN 201510108779 A CN201510108779 A CN 201510108779A CN 104762460 B CN104762460 B CN 104762460B
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Abstract
一种高强钢汽车板的轧制及深加工短流程集成制造方法，它的工艺流程为：原料→加热炉→控轧(粗轧和精轧)→层流冷却→综合落料→加热→成形淬火→切形、喷丸→成品；原料在加热炉中加热1250℃以上，终轧温度为820±30℃；以10±5℃/s冷却至700±50℃，保温2～5分钟，在连续加热炉中以15±5℃/s加热到880±30℃，保温3～5分钟，然后对冲压淬火件同时进行冲压和淬火，冲压淬火模具中冷却水流动速度为50±10℃/s，冷却至180±50℃，获得均匀马氏体组织的超高强度钢制件，其抗拉强度达到1500MPa以上。本发明能够优质高效生产、降低成本、促进低温余热等二次能源的综合利用，实现从原料到产品的一体化生产，达到节能降耗、环境保护的目的。A short-process integrated manufacturing method for rolling and deep processing of high-strength steel automobile plates. Its technological process is: raw material→heating furnace→controlled rolling (rough rolling and finishing rolling)→laminar cooling→comprehensive blanking→heating→forming quenching → Shape cutting, shot peening → finished product; raw materials are heated in a heating furnace above 1250°C, and the final rolling temperature is 820±30°C; cooled at 10±5°C/s to 700±50°C, kept for 2 to 5 minutes, and continuously Heating in the heating furnace at 15±5°C/s to 880±30°C, holding for 3 to 5 minutes, then stamping and quenching the stamped and quenched parts at the same time, the flow rate of cooling water in the stamping and quenching mold is 50±10°C/s, Cool to 180±50°C to obtain ultra-high-strength steel parts with uniform martensitic structure, and its tensile strength can reach more than 1500MPa. The invention can produce high-quality and high-efficiency, reduce cost, promote comprehensive utilization of secondary energy such as low-temperature waste heat, realize integrated production from raw materials to products, and achieve the goals of energy saving, consumption reduction, and environmental protection.
Description
Technical field
The invention belongs to rolling and field of deep, particularly to the rolling of a kind of high-strength steel Automobile Plate and deeply add
Work method.
Background technology
Along with being continuously increased of China's automobile sales volume, auto industry has become as the weight promoting China's economic growth
Wanting strength, the development trend of automotive light weight technology makes high-strength material application increasingly extensive.High-strength steel is the most several
Develop over Nian the most rapidly, one of the most great-hearted steel grade, due to its have higher intensity, good mould tough
Property and weldability, extensively apply in fields such as automobile makings.Owing to the forming property of high-strength steel compares ordinary steel
Plate is poor, and intensity is the highest, shapes the most difficult, easily ftractures, and resilience is serious.The quenching formed skill of punching press
Art is the cutting edge technology in stamping field, the quenching formed technology of punching press can form high strength part, under high temperature
Can eliminate the impact of resilience, formation of parts precision is high, and forming quality is good, it is possible to is widely used in automobile and protects
The important safety parts such as danger thick stick, A post, B post, C post, become what the most numerous automobile production manufacturer paid close attention to
Focus.
Rolling technique is the important step that high-strength steel Automobile Plate produces, and directly affects quality and the resultant force of product
Learn performance.Hot-rolled sheet coil common intensity is high, hardness is high, plasticity is good, cold working is relatively difficult, meanwhile, if
Taking no action to, mechanical property change is bigger than normal, brings corresponding difficulty to subsequent handling.High-strength steel vapour at present
Sweep hot rolling technology is after raw material → heating furnace → controlled rolling (roughing, finish rolling) → laminar flow cooling technology, by
The high-strength steel that band is had surplus heat by coiling machine be rolled into band volume, be transported to punching press quenching processing enterprise be processed.
The quenching formed technique of existing punching press is to be provided high-strength steel Automobile Plate by high-strength steel manufacturing enterprise, through heating
The technical processs such as → insulation → punching press quenching, are quenched to stamped for the high-strength steel of green strength about 440MPa
Shape postforming tensile strength reaches the super-high strength steel drip molding of about 1600MPa, the super-high strength steel part fortune of shaping
It is passed to various brands automobile productions enterprise.Owing to iron and steel raw material is through multiple processing, the preparation from raw material to finished product,
Expending mass energy, iron and steel enterprise can produce the complementary energy moneys such as substantial amounts of waste heat overbottom pressure in production high-strength steel Automobile Plate
Source, advances the secondary energy sources of iron and steel enterprise to recycle, in low temperature exhaust heat stage and the quenching formed technology of punching press
In conjunction with, can reach to save energy and reduce the cost, the purpose of environmental conservation, develop a kind of brand-new high-strength steel Automobile Plate and roll
System and deep processing short route Integrated-manufacturing Techniques have important practical significance and practical value.
Summary of the invention
It is an object of the invention to provide the high-strength steel Automobile Plate of a kind of low cost, efficiency height, energy-conserving and environment-protective
Rolling and deep processing short route integrated manufacturing method.The present invention mainly makes traditional hot rolling technology quench with punching press
Pyrogene shape techniqueflow reconstructs, and the high-strength steel Automobile Plate that Hot Line produces directly is carried out punching press quenching formed.
Technical scheme is as follows:
The technological process of the present invention is: raw material → heating furnace → controlled rolling (roughing, finish rolling) → section cooling →
Comprehensive blanking → heating → shaping quenches → cuts shape, shot-peening → finished product.
The present invention specifically comprises the following steps that
Being heated in heating furnace by raw material, temperature is more than 1250 DEG C, through roughing, finish rolling, last finish to gauge
Temperature is 820 ± 30 DEG C.
It is cooled to 700 ± 50 DEG C with slower 10 ± 5 DEG C/s of rate of cooling, is incubated 2～5 minutes, makes high-strength steel vapour
Sweep forms stable pearlitic structrure.
Through shear, high-strength steel Automobile Plate is cut into the geomery that punching press quenching mould needs, will cut
The plate cut is transferred to heat in continuous furnace.
In continuous furnace, it is heated to 880 ± 30 DEG C with the firing rate of 15 ± 5 DEG C/s, is incubated 3～5 minutes,
With the guarantee whole structural transformation of punching press quenching part as austenite, and crystal grain is unlikely the thickest.
Then by above-mentioned punching press quenching part by continuous furnace being transferred in punching press quenching mould, carry out simultaneously
Punching press and quenching, the rate of cooling cooling down water in punching press quenching mould is 50 ± 10 DEG C/s, is cooled to 180 ± 50 DEG C,
Drip molding can be had preferable cooling effect, it is ensured that steel plate can quickly cool down in deformation process, obtains
Obtaining the ultrahigh strength steel part at room temperature with uniform martensitic structure, after shaping, punching press quenching product is anti-
Tensile strength reaches more than 1500MPa.
The product shaped in punching press quenching mould is carried out cut and shot-peening post processing, reaches to shape
The dimensional requirement of product also eliminates the surface scale of molded part.
Through process above, it is achieved the integration production from raw material to product of the high-strength steel Automobile Plate, laser is cut
Cut with shot-peening after part carry out finished product packing, be transported to each automobile production enterprise.
The present invention compared with prior art has the advantage that
High-quality and efficient can produce, reduce cost, increase benefit, make the hot rolled production line of high-strength steel Automobile Plate
The most directly carry out punching press quenching formed, promote the comprehensive utilization of the secondary energy sources such as low temperature exhaust heat, it is achieved from raw material
To the integration production of product, reach to save energy and reduce the cost, the purpose of environmental conservation；Iron and steel enterprise can be set up simultaneously
Industry and downstream user strategic cooperation mechanism, promote iron and steel enterprise by manufacturer to the transformation of service provider, promote district
Territory iron and steel enterprise accelerates industrial upgrading, it is achieved rolling mill practice and the union and recombination of punching press quenching technology.
Accompanying drawing explanation
Fig. 1 is that the present invention rolls and deep processing Time-temperature variation diagram.
In Fig. 1: the 1-30s time period be high-strength steel Automobile Plate raw material in heating furnace, temperature is 1250 DEG C
Above；Being high-strength steel Automobile Plate roughing and finish rolling in the 30-40s time period, temperature is 820 ± 30 DEG C；At 40-220s
Time period is that high-strength steel Automobile Plate is cooled to slower 10 ± 5 DEG C/s of rate of cooling in section cooling
700 ± 50 DEG C, it is incubated 120～300s；It is that plate heats in punching press quenching heating furnace in the 220-420s time period,
It is heated to 880 ± 30 DEG C with the firing rate of 15 ± 5 DEG C/s, is incubated 180～300s, is finally that high-strength steel is at mould
In the middle punching press quenching formed stage, the rate of cooling cooling down water in punching press quenching mould is 50 ± 10 DEG C/s, cooling
To 180 ± 50 DEG C.
Detailed description of the invention
Embodiment 1
Being put into by raw material in heating furnace, heating-up temperature is 1250 DEG C, through conventional roughing, finish rolling, finally
Finishing temperature is 790 DEG C.
It is cooled to 650 DEG C with slower 5 DEG C/s of rate of cooling, is incubated 2 minutes at 650 DEG C, makes high-strength steel vapour
Sweep forms stable pearlitic structrure.
Through shear, high-strength steel Automobile Plate is cut into the geomery that punching press quenching mould needs, pass through
The plate sheared is transferred to heat in continuous furnace by high temperature puma manipulator.
In continuous furnace, it is heated to 850 DEG C with the firing rate of 10 DEG C/s, is incubated 3 minutes, to ensure punching
The pressure whole structural transformation of quenching part is austenite, and crystal grain is unlikely the thickest.Then by high temperature intelligent machine
Tool hands is quenching formed by transferring in continuous furnace to carry out punching press in punching press quenching mould by punching press quenching part.
In punching press quenching mould, punching press quenching part is carried out simultaneously punching press and quenching, in punching press quenching mould
The rate of cooling of cooling water is 40 DEG C/s, is cooled to 130 DEG C, drip molding can be had preferable cooling effect,
Ensure that steel plate can quickly cool down in deformation process.Obtain and at room temperature there is the super of uniform martensitic structure
High-duty steel part, after shaping, the tensile strength of punching press quenching product reaches more than 1520MPa.
The product shaped in punching press quenching mould is carried out cut and shot-peening post processing, reaches to shape
The dimensional requirement of product also eliminates the surface scale of molded part.
Through process above, it is achieved the integration production from raw material to product of the high-strength steel Automobile Plate, laser is cut
Cut with shot-peening after part carry out finished product packing, be transported to each automobile production enterprise.
Embodiment 2
Being put into by raw material in heating furnace, heating-up temperature is 1250 DEG C, through conventional roughing, finish rolling, finally
Finishing temperature is 820 DEG C.
It is cooled to 700 DEG C with slower 10 DEG C/s of rate of cooling, is incubated 3 minutes at 700 DEG C, makes high-strength steel vapour
Sweep forms stable pearlitic structrure.
Through shear, high-strength steel Automobile Plate is cut into the geomery that punching press quenching mould needs, pass through
The plate sheared is transferred to heat in continuous furnace by high temperature puma manipulator.
In continuous furnace, it is heated to 880 DEG C with the firing rate of 15 DEG C/s, is incubated 4 minutes, to ensure punching
The pressure whole structural transformation of quenching part is austenite, and crystal grain is unlikely the thickest.Then by high temperature intelligent machine
Tool hands is quenching formed by transferring in continuous furnace to carry out punching press in punching press quenching mould by punching press quenching part.
In punching press quenching mould, punching press quenching part is carried out simultaneously punching press and quenching, in punching press quenching mould
The rate of cooling of cooling water is 50 DEG C/s, is cooled to 180 DEG C, drip molding can be had preferable cooling effect,
Ensure that steel plate can quickly cool down in deformation process.Obtain and at room temperature there is the super of uniform martensitic structure
High-duty steel part, after shaping, the tensile strength of punching press quenching product reaches more than 1600MPa.
The product shaped in punching press quenching mould is carried out cut and shot-peening post processing, reaches to shape
The dimensional requirement of product also eliminates the surface scale of molded part.
Through process above, it is achieved the integration production from raw material to product of the high-strength steel Automobile Plate, laser is cut
Cut with shot-peening after part carry out finished product packing, be transported to each automobile production enterprise.
Embodiment 3
Being put into by raw material in heating furnace, heating-up temperature is 1250 DEG C, through conventional roughing, finish rolling, finally
Finishing temperature is 850 DEG C.
It is cooled to 750 DEG C with slower 15 DEG C/s of rate of cooling, is incubated 5 minutes at 750 DEG C, makes high-strength steel vapour
Sweep forms stable pearlitic structrure.
Through shear, high-strength steel Automobile Plate is cut into the geomery that punching press quenching mould needs, pass through
The plate sheared is transferred to heat in continuous furnace by high temperature puma manipulator.
In continuous furnace, it is heated to 910 DEG C with the firing rate of 20 DEG C/s, is incubated 5 minutes, to ensure punching
The pressure whole structural transformation of quenching part is austenite, and crystal grain is unlikely the thickest.Then by high temperature intelligent machine
Tool hands is quenching formed by transferring in continuous furnace to carry out punching press in punching press quenching mould by punching press quenching part.
In punching press quenching mould, punching press quenching part is carried out simultaneously punching press and quenching, in punching press quenching mould
The rate of cooling of cooling water is 60 DEG C/s, is cooled to 230 DEG C, drip molding can be had preferable cooling effect,
Ensure that steel plate can quickly cool down in deformation process.Obtain and at room temperature there is the super of uniform martensitic structure
High-duty steel part, after shaping, the tensile strength of punching press quenching product reaches more than 1550MPa.
The part shaped in punching press quenching mould is carried out cut and shot-peening post processing, makes punching press quench
Fire part reaches the dimensional requirement of molded part and eliminates the surface scale of molded part.
Through process above, it is achieved the integration production from raw material to product of the high-strength steel Automobile Plate, laser is cut
Cut with shot-peening after part carry out finished product packing, be transported to each automobile production enterprise.
Claims (1)
1. the rolling of a high-strength steel Automobile Plate and deep processing short route integrated manufacturing method, it is characterized in that: its technological process is: raw material → heating furnace → controlled rolling, quench → cut shape, shot-peening → finished product including roughing and finish rolling → section cooling → comprehensive blanking → heating → shaping；
It specifically comprises the following steps that
(1) being heated in heating furnace by raw material, temperature is more than 1250 DEG C, and through conventional roughing, finish rolling, last finishing temperature is 820 ± 30 DEG C；
(2) it is cooled to 700 ± 50 DEG C with slower 10 ± 5 DEG C/s of rate of cooling, is incubated 2～5 minutes, makes high-strength steel Automobile Plate form stable pearlitic structrure；
(3) through shear, high-strength steel Automobile Plate is cut into the geomery that punching press quenching mould needs, transfer to continuous furnace heats by the plate sheared;
(4) in continuous furnace, it is heated to 880 ± 30 DEG C with the firing rate of 15 ± 5 DEG C/s, it is incubated 3～5 minutes, to ensure that the whole structural transformation of punching press quenching part is as austenite, and crystal grain is unlikely the thickest, then that above-mentioned punching press quenching part is quenching formed by transferring in continuous furnace to carry out punching press in punching press quenching mould；
(5) in punching press quenching mould, punching press quenching part is carried out simultaneously punching press and quenching, the rate of cooling cooling down water in punching press quenching mould is 50 ± 10 DEG C/s, it is cooled to 180 ± 50 DEG C, drip molding can be had preferable cooling effect, ensureing that steel plate can quickly cool down in deformation process, it is thus achieved that at room temperature have the ultrahigh strength steel part of uniform martensitic structure, after shaping, the tensile strength of punching press quenching product reaches more than 1500MPa；
(6) product shaped in punching press quenching mould is carried out cut and shot-peening post processing, reach the dimensional requirement of molded part and eliminate the surface scale of molded part；
(7) through process above, it is achieved the integration production from raw material to product of the high-strength steel Automobile Plate, the part after cut and shot-peening is carried out finished product packing, is transported to each automobile production enterprise.
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| CN109433825B (en) * | 2018-11-13 | 2020-03-31 | 燕山大学 | Method for producing high-strength steel plate in a short process, high-strength steel plate and application thereof |
| CN109985904A (en) * | 2019-04-30 | 2019-07-09 | 中冶赛迪技术研究中心有限公司 | A kind of method and system of continuous casting and rolling production thermoforming steel |
| CN113926892B (en) * | 2020-06-29 | 2024-07-12 | 宝山钢铁股份有限公司 | Stamping forming process and application of hot-rolled ultra-high strength dual-phase steel part with tensile strength of more than or equal to 980MPa |
| CN111872149B (en) * | 2020-07-15 | 2021-02-09 | 燕山大学 | ESP-based dynamic variable rule slab performance gradient distribution forming method |
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| JP4951997B2 (en) * | 2005-03-28 | 2012-06-13 | Ｊｆｅスチール株式会社 | A method for producing a high-tensile steel sheet having a tensile strength of 550 MPa or more. |
| CN100571971C (en) * | 2008-06-25 | 2009-12-23 | 钢铁研究总院 | A kind of hot rolled steel plate for punch process and preparation method thereof |
| JP5418047B2 (en) * | 2008-09-10 | 2014-02-19 | Ｊｆｅスチール株式会社 | High strength steel plate and manufacturing method thereof |
| CN102031455A (en) * | 2009-09-30 | 2011-04-27 | 鞍钢股份有限公司 | Steel plate for stamping and quenching and manufacturing method thereof |
| CN102031456B (en) * | 2009-09-30 | 2013-07-03 | 鞍钢股份有限公司 | Steel sheet for press hardening and method of hot forming the same |
| CN102199732B (en) * | 2010-03-25 | 2013-04-24 | 宝山钢铁股份有限公司 | Boron containing steel plate for heat treatment and manufacturing method thereof |
| US8986849B2 (en) * | 2011-04-01 | 2015-03-24 | Nippon Steel & Sumitomo Metal Corporation | Hot stamped high strength part excellent in post painting anticorrosion property and method of production of same |
| CN102181795B (en) * | 2011-05-16 | 2013-01-09 | 马鸣图 | Ultrahigh-strength bulletproof steel plate and manufacturing process thereof |
| PL2803748T3 (en) * | 2012-01-13 | 2018-08-31 | Nippon Steel & Sumitomo Metal Corporation | Hot stamp molded article, and method for producing hot stamp molded article |
| CN103212950A (en) * | 2013-04-24 | 2013-07-24 | 大连理工大学 | A process for improving the toughness and formability of AHSS hot stamping structural parts for vehicles |
| CN103320700B (en) * | 2013-06-26 | 2015-10-14 | 武汉钢铁(集团)公司 | A kind of 1500MPa level car safety part steel and production method thereof |
| CN103320702B (en) * | 2013-06-26 | 2016-01-20 | 武汉钢铁(集团)公司 | A kind of tensile strength 1700MPa level thermoforming steel and production method thereof |
| CN103614640B (en) * | 2013-12-12 | 2016-10-05 | 马鸣图 | A kind of non-coating hot press-formed steel of resistance to high temperature oxidation |
| CN104195443A (en) * | 2014-05-19 | 2014-12-10 | 首钢总公司 | High-flexural-behavior hot-formed steel used for automobiles and manufacturing method thereof |
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