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Production method of cold-rolled steel plate for electro-galvanization

A technology of cold-rolled steel plate and production method, which is applied in the field of production technology of metal plate, can solve the problems of production method and lack of control of surface quality, and achieve the effect of good plate shape and improvement of surface quality.

Active Publication Date: 2015-07-29
马钢(合肥)钢铁有限责任公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the prior art, the electro-galvanized steel sheet is to change the composition of the plating solution, control the electro-galvanizing process parameters to improve the surface quality of the coating, and there is a lack of corresponding technology for the production method and surface quality control of the steel sheet before electroplating

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  • Production method of cold-rolled steel plate for electro-galvanization
  • Production method of cold-rolled steel plate for electro-galvanization
  • Production method of cold-rolled steel plate for electro-galvanization

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Embodiment Construction

[0035] The specific implementation manner of the present invention will be described in further detail below by describing the best embodiment with reference to the accompanying drawings.

[0036] The production method of the cold-rolled steel sheet for electrogalvanizing, the steel type is smelted according to the composition, and the specific process steps are:

[0037] (1) molten iron pretreatment;

[0038] (2) converter smelting;

[0039] (3) Alloy fine-tuning station;

[0040] (4) RH furnace refining;

[0041] (5) Continuous casting;

[0042] (6) hot rolling;

[0043] (7) coiling;

[0044] (8) cold rolling;

[0045] (9) Continuous annealing;

[0046] (10) Smooth.

[0047] The weight percentage of the chemical composition of the steel is: C: ≤0.020%; Si: ≤0.030%; Mn: 0.15%~0.25%; P: ≤0.020%; S: ≤0.012%; : ≤0.0050%; the rest is iron and unavoidable impurities.

[0048] The effect of steel type alloy element in the present invention is mainly based on the following...

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Abstract

The invention discloses a production method of a cold-rolled steel plate for electro-galvanization. The steel plate is smelted according to components. The production method comprises the following concrete technological steps: (1) pretreating liquid iron; (2) smelting in a rotary furnace; (3) finely tuning alloy; (4) refining in an RH furnace; (5) continuously casting; (6) performing hot rolling; (7) rolling; (8) performing cold rolling; (9) continuously annealing; (10) flattening. By precisely controlling the components in the steel and being combined with a production process of the cold-rolled steel plate for electro-galvanization, the production method disclosed by the invention can be used for obtaining the cold-rolled steel plate which is 150 to 40Mpa in yield strength, higher than 270MPa in tensile strength, larger than 37% in percentage elongation, capable of satisfying the requirements of deep drawing and molding, good in plate form and surface quality (above FC) and capable of satisfying the requirements of electro-galvanization and subsequent passivation and anti-fingerprint treatment; the surface quality of the steel plate for electro-galvanization can be improved; the steel plate for electro-galvanization is enabled to have the good plate form.

Description

technical field [0001] The invention relates to a production process of a metal plate (strip), in particular to a production method of a cold-rolled steel plate for electrogalvanizing. Background technique [0002] Cold-rolled steel sheets for electro-galvanizing are mainly used in the production of electro-galvanized steel coils. Electro-galvanized steel sheets have good corrosion resistance, processability, weldability and paintability, and are mainly used in industries such as automobiles, home appliances, electronics, and light industry. With the rapid development of my country's automobile, home appliance, and electronics industries, the market for electro-galvanized steel sheets in my country is in short supply. Due to the constraints of quality factors and manufacturing technology level, my country's electro-galvanized steel sheet products still need to be imported in large quantities. [0003] Due to the particularity of the electro-galvanizing process, the steel pl...

Claims

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Application Information

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IPC IPC(8): C22C38/06C22C33/04C21D8/02
Inventor 王占业张宜赵云龙杨兴亮葛鑫涛汪建威汤亨强张翠
Owner 马钢(合肥)钢铁有限责任公司
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