A kind of steel with high r value and thick specification IF automobile and its production method

A production method and thick gauge technology, which are applied in the field of high r value thick gauge IF automotive steel and its production field, can solve the problem of no high quality IF steel product production method, etc. The effect of formability and mechanical properties

Active Publication Date: 2016-08-03
SHOUGANG CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In recent years, with the continuous development of sheet metal forming technology, many domestic iron and steel enterprises have begun to study high-quality IF steel plates that can be applied to mid-to-high-end cars, but there is no high-quality IF steel that can be applied to mid-to-high-end cars in the prior art Documentation on the production method of the product

Method used

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  • A kind of steel with high r value and thick specification IF automobile and its production method
  • A kind of steel with high r value and thick specification IF automobile and its production method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The flow process of the production method of the high r value thick specification IF automobile steel provided by the invention is:

[0042]According to the design of steel composition, C: 0.015%, Si≤0.03%, Mn: 0.11~0.15%, P≤0.015%, S≤0.012%, Als: 0.035~0.050%, N≤0.003%, and the balance is Fe And unavoidable impurities, using molten iron desulfurization, converter blowing, RH vacuum refining, continuous casting to obtain continuous casting slabs.

[0043] The continuous casting slab is heated by a heating furnace, rolled on a continuous hot rolling mill, cooled under control, and then coiled. The coiling temperature after hot rolling is controlled at 716°C to produce qualified hot-rolled steel coils. The product thickness is controlled at 2.3mm.

[0044] The hot-rolled steel coil is re-coiled and pickled to wash off the oxide scale on the surface, and then cold-rolled on a cold tandem rolling mill, and the cold-rolling reduction rate is controlled to be 76.2% to obtain...

Embodiment 2

[0048] The flow process of the production method of the high r value thick specification IF automobile steel provided by the invention is:

[0049] According to the design of steel composition, C: 0.016%, Si≤0.03%, Mn: 0.11~0.15%, P≤0.015%, S≤0.012%, Als: 0.035~0.050%, N≤0.003%, and the balance is Fe And unavoidable impurities, using molten iron desulfurization, converter blowing, RH vacuum refining, continuous casting to obtain continuous casting slabs.

[0050] The continuous casting slab is heated by a heating furnace, rolled on a continuous hot rolling mill, and cooled under control, and then coiled. The coiling temperature after hot rolling is controlled at 732°C, and qualified hot-rolled steel coils are produced. The product thickness is controlled at 2.4mm.

[0051] The hot-rolled steel coil is re-coiled and pickled to wash off the oxide scale on the surface, and then cold-rolled on a cold tandem rolling mill, and the cold-rolling reduction rate is controlled to be 75....

Embodiment 3

[0055] The flow process of the production method of the high r value thick specification IF automobile steel provided by the invention is:

[0056] According to the design of steel composition, C: 0.018%, Si≤0.03%, Mn: 0.11~0.15%, P≤0.015%, S≤0.012%, Als: 0.035~0.050%, N≤0.003%, and the balance is Fe And unavoidable impurities, using molten iron desulfurization, converter blowing, RH vacuum refining, continuous casting to obtain continuous casting slabs.

[0057] The continuous casting slab is heated by a heating furnace, rolled on a continuous hot rolling mill, and cooled under control, and then coiled. The coiling temperature after hot rolling is controlled at 722°C, and qualified hot-rolled steel coils are produced. The product thickness is controlled at 2.4mm.

[0058] The hot-rolled steel coil is re-coiled and pickled to wash off the oxide scale on the surface, and then cold-rolled on a cold tandem rolling mill to control the cold-rolling reduction rate to 78.3% to obtai...

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Abstract

The invention relates to a high-r-value thick IF automotive steel and a production method thereof. The method comprises: desulfurizing molten iron, converter blowing, RH vacuum refining, and continuous casting to obtain continuous casting slabs; heating the continuous casting slabs rolling to obtain hot-rolled slabs; coiling hot-rolled slabs to obtain hot-rolled steel coils; uncoiling pickling of hot-rolled steel coils; cold-rolling hot-rolled steel coils after pickling to obtain cold-rolled steel sheets ; Anneal the cold-rolled steel plate in the continuous annealing furnace; smooth the cold-rolled steel plate after annealing; the high r-value thick specification IF automotive steel produced by this method has good formability and mechanical properties, and can meet the requirements of medium and high grades. Stamping performance requirements for automotive sheets.

Description

technical field [0001] The invention relates to the technical field of metal material processing, in particular to a high-r-value thick specification IF automotive steel and a production method thereof. Background technique [0002] In recent years, IF steel has gradually become a new generation of stamping steel after boiling steel and aluminum killed steel due to its excellent deep drawing and non-aging properties, and it is a symbol of a country's production level of automotive steel plates. At present, the production of IF steel in my country has a certain scale, but it is still in the primary stage of development. Taking ordinary IF steel for automobile plates as an example, domestically produced IF steel can only meet the quality requirements of steel plates for middle and low-end cars and trucks, and high-quality steel plates for middle and high-end cars still need to be imported in large quantities, especially for cars with very strict surface quality requirements. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/06C22C33/04C21D8/02B21C37/02
Inventor 孙存友程晓杰乔建军闻达贾松孙建华李振曾卫仔
Owner SHOUGANG CORPORATION
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