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Continuous annealing cold-rolled carbon steel for stamping and preparation method thereof

A technology of cold-rolled carbon steel and continuous annealing, applied in the field of continuous annealing cold-rolled carbon steel for stamping and its preparation, can solve the problems that the surface of stamping parts cannot meet the use requirements, the quality requirements of automobile outer panels, and rough stamping, etc. Achieve the effects of fine and uniform structure of the finished product, good formability, and increase the strength of the strip steel

Active Publication Date: 2020-12-08
首钢股份公司迁安钢铁公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] The continuous annealing cold-rolled carbon steel for continuous annealing stamping is mainly used in the stamping production of automobile plates. The surface quality of the material in the Kaiping blanking process is good and there are no stamping rough defects, but stamping rough defects appear after more than 4% stamping deformation, which cannot meet the requirements of automotive exterior Board Quality Requirements
Surface defects of cold-rolled sheets are one of the important defects that affect the performance of steel sheets. Surface defects will amplify defects during cold-rolled stamping deformation, resulting in the surface of stamping parts not meeting the requirements for use.

Method used

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  • Continuous annealing cold-rolled carbon steel for stamping and preparation method thereof
  • Continuous annealing cold-rolled carbon steel for stamping and preparation method thereof
  • Continuous annealing cold-rolled carbon steel for stamping and preparation method thereof

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preparation example Construction

[0045] The present invention also provides a preparation method of the continuous annealing cold-rolled carbon steel for stamping, the preparation method comprising:

[0046] Obtain the cast slab of continuous annealing cold-rolled carbon steel for stamping;

[0047] The slab is heated before rolling, hot rolled, cooled after rolling, coiled, pickled, cold rolled, annealed and leveled to obtain continuous annealed cold rolled carbon steel for stamping,

[0048] The heating temperature before rolling is 1150-1200°C, the coiling temperature is 600-680°C,

[0049] The hot rolling includes rough rolling and finish rolling,

[0050] In the pickling, the pickling F1-F3 grinds smooth rolls, and the F4 frame uses textured rolls with a roughness of 0.8 to 2.5 μm.

[0051] The annealing temperature of the annealing is 760-800°C,

[0052] The flat elongation is 0.8-1.3%.

[0053] The preparation method of the continuous annealing cold-rolled carbon steel for stamping provided by the in...

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Abstract

The invention discloses continuous annealing cold-rolled carbon steel for stamping. The continuous annealing cold-rolled carbon steel comprises the following chemical components in percentage by mass:less than or equal to 0.0060% of C, less than or equal to 0.05% of Si, 0.15%-0.3% of Mn, 0.015-0.025% of P, less than or equal to 0.018% of S, 0.035%-0.065% of Al, 0.035%-0.09% of Ti and the balanceFe and inevitable impurities. The invention further discloses a method. The method comprises the following steps: casting a blank, heating before rolling, hot rolling, cooling after rolling, coiling,pickling, cold rolling, annealing and flattening, wherein the heating temperature before rolling is 1150-1200 DEG C, the coiling temperature is 600-680 DEG C, a F1-F3 grinding smooth roll is subjectedto pickling rolling, a 0.8-2.5 microns roughening roll is used for F4, the annealing temperature is 760-800 DEG C, and the flattening elongation is 0.8-1.3%. According to the continuous annealing cold-rolled carbon steel for stamping, the surface of strip steel is free of stamping roughness defects after more than 4% of strip steel is subjected to stamping forming.

Description

technical field [0001] The invention relates to the technical field of steel preparation, in particular to a continuous annealed cold-rolled carbon steel for stamping and a preparation method thereof. Background technique [0002] The continuous annealing cold-rolled carbon steel for continuous annealing stamping is mainly used in the stamping production of automobile plates. The surface quality of the material in the Kaiping blanking process is good and there are no stamping rough defects, but stamping rough defects appear after more than 4% stamping deformation, which cannot meet the requirements of automotive exterior board quality requirements. Surface defects of cold-rolled sheets are one of the important defects that affect the performance of steel sheets. Surface defects will amplify defects during cold-rolled stamping deformation, resulting in the surface of stamping parts not meeting the requirements for use. The surface defects of ultra-low carbon steel hot-rolled...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/14B21C37/02C21D8/02
CPCB21C37/02C21D8/0205C21D8/0226C21D8/0263C22C38/02C22C38/04C22C38/06C22C38/14
Inventor 陈瑾王明哲焦会立陆晔周晓琦尉冬宋浩源关建东
Owner 首钢股份公司迁安钢铁公司
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