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IF isotropic steel with stamping forming improved and manufacturing method thereof

A technology of stamping forming and manufacturing method, applied in the field of metal material manufacturing, can solve the problems of plasticity, deep drawing performance and anti-aging performance, pulling and other problems

Active Publication Date: 2018-11-02
新余钢铁股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The composition shows that it is still aluminum-strength clean steel, and the plasticity, deep drawing performance and aging resistance of the product still have a gap compared with IF isotropic steel. It can only be used for general stamping, and cannot be used for deep drawing like IF isotropic steel.
In addition, there is no requirement for the surface roughness Ra of the steel strip, and the stamping process is also prone to napping defects

Method used

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  • IF isotropic steel with stamping forming improved and manufacturing method thereof
  • IF isotropic steel with stamping forming improved and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] Embodiment 1: A kind of IF isotropic steel that improves stamping forming, described IF isotropic steel:

[0071] 1) After smelting in a converter, refining in an RH furnace, and continuous casting into a slab with the component number A1:

[0072] 2) Hot rolling: heat the slab with the component number A1, the target hot rolling thickness is 2.5 mm, the billet is rough rolled and finished rolled to obtain a hot rolled plate, the final rolling temperature is 926 ~ 928 ° C, and then the hot rolled The rolled plate is cooled by laminar flow, and then coiled into a hot-rolled coil at a coiling temperature of 618-620°C;

[0073] 3) Cold rolling: the target cold rolling thickness is 0.30 mm, and the hot rolled coil is rolled after pickling, and the reduction ratio is 87.4%;

[0074] 4) Annealing treatment: the temperature of the soaking section of the continuous annealing furnace is 740-742°C;

[0075] 5) Leveling and tension bridge: leveling elongation 1.1% + tension leve...

Embodiment 2

[0077] Embodiment 2: A kind of IF isotropic steel that improves stamping forming, described IF isotropic steel:

[0078] 1) After smelting in a converter, refining in an RH furnace, and continuous casting into a slab with the component number A2:

[0079] 2) Hot rolling: heat the slab with the component number A2, the target hot rolling thickness is 2.5mm, the billet is rough rolled and finished rolled to obtain a hot rolled plate, the final rolling temperature is 929 ~ 932 ° C, and then the hot rolled The rolled plate is cooled by laminar flow, and then coiled into hot-rolled coils at a coiling temperature of 606°C;

[0080] 3) Cold rolling: the target cold rolling thickness is 0.30 mm, and the hot rolled coil is rolled after pickling, and the reduction rate is 89.1%;

[0081] 4) Annealing treatment: the temperature of the soaking section of the continuous annealing furnace is 718-720°C;

[0082] 5) Leveling and tension bridge: leveling elongation 1.2% + tension leveling el...

Embodiment 3

[0084] Embodiment 3: A kind of IF isotropic steel that improves stamping forming, described IF isotropic steel:

[0085] 1) After smelting in a converter, refining in an RH furnace, and continuous casting into a slab with the component number A3:

[0086] 2) Hot rolling: heat the slab with the component number A3, the target hot rolling thickness is 2.5mm, the billet is rough rolled and finished rolled to obtain a hot rolled plate, the final rolling temperature is 935 ~ 936 ° C, and then the hot rolled The rolled plate is cooled by laminar flow, and coiled into hot rolled coil after cooling, the coiling temperature is 601-602°C;

[0087] 3) Cold rolling: the target cold rolling thickness is 0.30 mm, the hot rolled coil is rolled after pickling, and the reduction rate is 90.3%;

[0088] 4) Annealing treatment: the temperature of the soaking section of the continuous annealing furnace is 716-722°C;

[0089] 5) Leveling and tension bridge: leveling elongation 1.3% + tension lev...

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Abstract

The invention discloses IF isotropic steel with stamping forming improved and a manufacturing method of the IF isotropic steel. The IF isotropic steel is composed of, by weight percent, 0.0012% to 0.0026% of C, not larger than 0.026% of Si, 0.28% to 0.52% of Mn, not larger than 0.015% of P, not larger than 0.010% of S, 0.042% to 0.082% of Al, 0.046% to 0.066% of Ti, not larger than 0.0030% of N and the balance Fe and inevitable impurities. According to the IF isotropic steel, in the subsequent hot rolling, cold rolling, continuous annealing, flattening and bridging production processes, the rolling temperature is controlled to range from 580 DEG C to 620 DEG C, the cold rolling reduction rate is controlled to range from 85% to 95%, the annealing temperature is controlled to range from 708DEG C to 742 DEG C, the flattening ductility is controlled to range from 1.0% to 2.0%, and the bridging ductility is controlled to range from 0.03% to 0.10%; and according to the obtained IF isotropicsteel, the surface roughness Ra ranges from 0.36 micrometer to 0.56 micrometer, the peak concurrent Pc is larger than or equal to 126, the hardness ranges from 95 HV to 110 HV, the plastic strain ratio r90 value is larger than or equal to 1.8, the work-hardening exponent n90 value is larger than or equal to 0.18, and the delta r value is smaller than or equal to 0.20. The beneficial effect that when a round component is deeply stamped, no earing or galling defect is generated is achieved.

Description

technical field [0001] The invention relates to the technical field of metal material manufacturing, in particular to the manufacturing technology of cold-rolled steel strips, in particular to an IF isotropic steel with improved stamping and a manufacturing method thereof. Background technique [0002] IF (interstitial atom-free steel) steel belongs to the steel for ultra-deep drawing series, and the C in the steel is usually controlled below 0.005%. IF isotropic steel not only requires excellent deep drawing performance, but also requires good plane isotropy, which means that the lower the △r value of the plane isotropy index, the better, usually △r value ≤ 0.30. At present, IF isotropic steel is mainly used in the battery case and oil filter of new energy vehicles in the automobile manufacturing industry. Stamping components of this type of IF steel require uniform wall thickness reduction and no earing (note: earing refers to the anisotropy of the material that leads to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/04C22C38/06C22C38/14C22C38/02C21D8/04
CPCC21D8/0405C21D8/0436C21D8/0473C22C38/001C22C38/004C22C38/02C22C38/04C22C38/06C22C38/14
Inventor 吴洪赵和明杨源华舒昕杨红来王振基金大华彭冲王婷华江先海叶宏勇郭赞扬马鹏飞钟小杰黄丽芳夏雪生
Owner 新余钢铁股份有限公司
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