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A kind of low carbonation washing steel with excellent formability and surface quality and production method

A technology of surface quality and formability, applied in the field of steel production, can solve problems such as poor thickness accuracy, rough surface, stamping cracking, etc., and achieve the effects of reducing production costs, high plastic strain ratio, and light aging

Active Publication Date: 2022-05-13
RIZHAO BAOHUA NEW MATERIAL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It is used to solve the problems of heavy aging, poor thickness accuracy, rough surface of low-carbonated steel, resulting in stamping cracks, ear forming problems, and surface defects such as transverse creases, pits and pits that affect the quality of parts

Method used

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  • A kind of low carbonation washing steel with excellent formability and surface quality and production method
  • A kind of low carbonation washing steel with excellent formability and surface quality and production method
  • A kind of low carbonation washing steel with excellent formability and surface quality and production method

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Embodiment Construction

[0015] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0016] The composition design mass percentage of the low carbonation washed steel of the present invention is: C: 0.03-0.05%, Si: 0.035-0.08%, Mn: 0.1-0.3%, P≤0.015%, S≤0.008%, N≤0.005%, Alt : 0.020-0.045%, B: 0.001-0.003%, the rest is iron and unavoidable impurities. Where B / N: 0.7-1.4.

[0017] The compositional design is detailed as follows:

[0018] C is one of the main control elements of low-carbonated steel, which has an important influence on the structure and properties of low-carbon steel. If the C content is too high, the strength of the pickled steel plate will increase, the elongation will decrease, and its formability and weldability will deteriorate; but if the carbon content is less than 0.030%, it is necessary to increase the vacuum treatment process for decarburization and increase the cost. Therefore, the present invention...

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Abstract

The invention discloses a low-carbonated steel with excellent formability and surface quality, which relates to the field of iron and steel production. P≤0.015%, S≤0.008%, N≤0.005%, Alt: 0.020‑0.045%, B: 0.001‑0.003%, and the rest are iron and unavoidable impurities. Compared with the prior art, the invention solves the problems of stamping cracking and ear forming caused by low-carbonated washed steel due to heavy aging, poor thickness accuracy and rough surface.

Description

technical field [0001] The invention relates to the field of steel production, in particular to low-carbonated steel with excellent formability and surface quality and a production method. Background technique [0002] Pickling steel is an intermediate product between cold rolling and hot rolling obtained by pickling hot rolled coils as raw materials. Therefore, the performance, shape and surface quality of pickled steel are better than hot-rolled sheets, but slightly worse than cold-rolled sheets; but in terms of cost, the cost is lower than cold-rolled sheets because cold rolling and annealing are omitted. Low-carbonated steel is widely used in automobiles, home appliances, machinery, hardware and other industries due to its high stamping performance and surface quality, and can play an important role in replacing cold-rolled products to reduce costs and replace hot-rolled products to achieve quality upgrades. , has great application potential. However, compared with col...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/06C21D8/02
CPCC22C38/02C22C38/04C22C38/06C22C38/002C21D8/0226C21D2211/005C21D2211/003
Inventor 郑泽林赵鲁鹏李远旭陈潮汪晓川金柱元朱志强吕士迎秦哲张俊志王振迪代玖林
Owner RIZHAO BAOHUA NEW MATERIAL CO LTD
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