Production method of black skin steel belt for automobile beam

A production method and technology for automobile beams, applied in the field of producing metal materials, can solve problems such as undiscovered

Inactive Publication Date: 2015-02-11
通化钢铁股份有限公司
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Problems solved by technology

After consulting the data, no production method of black steel strip for automobile frame that can be directly stamped without pickling has been found.

Method used

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  • Production method of black skin steel belt for automobile beam
  • Production method of black skin steel belt for automobile beam

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Embodiment Construction

[0033] The chemical composition (wt%) of the black steel strip is: C: 0.04% to 0.07%, Si: ≤0.15%, Mn: 1.10% to 1.30%, P: ≤0.025%, S: ≤0.01%, Nb: 0.020% to 0.030%, Ti: 0.015% to 0.025%, Als: 0.015 to 0.025%, the remainder being Fe and other unavoidable impurities. The present invention adopts top-bottom compound blowing converter + LF refining furnace + thin slab continuous casting and rolling process, and the whole production process is: steelmaking, refining, continuous casting, soaking, hot continuous rolling, laminar cooling, coiling and other processes process.

[0034] 1. The LF refining process precisely controls the content of microalloy elements, the niobium content is controlled at 0.20% to 0.30%, and the titanium content is controlled at 0.015% to 0.025%.

[0035] 2. Carry out deep desulfurization operation in LF furnace to achieve the control target of [S]≤0.008%.

[0036] 3. Control the cooling intensity of the slab by adjusting the cooling water flow rate of the...

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Abstract

The invention discloses a production method of a black skin steel belt for an automobile beam. The production method comprises a technological process of steel making, refining, continuous casting, soaking, hot continuous rolling, laminar cooling and winding, and is characterized in that the angle temperature of a continuous casting blank in a fan-shaped section straightening area reaches above 1000 DEG C and avoids a brittleness temperature area of 850-950 DEG C; the steel temperature in the soaking procedure is 1095-1115 DEG C; the final rolling temperature in the hot continuous rolling procedure is 850-870 DEG C; the finish rolling total reduction rate of finished products with the thickness specification within 8.0-10.0 mm is greater than 70%; under the precondition of guaranteeing the finish rolling total reduction rate, the R2 reduction rate of products with thicknesses smaller than 8.0 mm is controlled within 48-52%; and the winding temperature is controlled within 550-570 DEG C. The method can directly punch steel plates without needing acid washing.

Description

technical field [0001] The invention belongs to the field of producing metal materials, and relates to a production method of a black-skinned steel strip for automobile girders. Background technique [0002] Steel for automobile frame is widely used in the manufacture of structural parts such as horizontal beams and longitudinal beams of automobile chassis. When stamping structural parts for automobiles, if the steel for automobile frame produced by traditional technology is stamped directly without pickling, the scale will fall off and become Phenomena such as dust not only pollute the environment, but also affect the service life of stamping dies and seriously affect the next step of production of auto parts. Therefore, it is usually necessary to use pickling to remove the iron oxide scale on the surface of the steel plate. With the continuous development of the automobile industry, its requirements for steel materials are getting higher and higher. It is required that the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/14C21C7/00B21B1/26
CPCC22C38/04C21D8/0205C21D8/0226C22C38/02C22C38/12C22C38/14
Inventor 王韶光王晓春关春立王春成于大海李松波柴超尚冰李春雷韩立海谢勇
Owner 通化钢铁股份有限公司
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