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Cold-rolled flat steel product for packaging

A product, flat steel technology, applied in the field of cold-rolled flat steel products, can solve the problems of expensive alloy elements and reduced cold-rollability

Pending Publication Date: 2021-09-07
THYSSENKRUPP AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the alloying elements required for this are expensive and increase the annealing temperature for recrystallization
In addition, due to the improvement of the basic strength of the hot-rolled strip, the cold-rollability is reduced, and the surface of the steel plate is more prone to defects

Method used

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  • Cold-rolled flat steel product for packaging
  • Cold-rolled flat steel product for packaging
  • Cold-rolled flat steel product for packaging

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0122] Embodiments of the present invention and Comparative Examples set forth below.

[0123] Molten steel alloying components by hot rolling and subsequent cold rolling recited in Table 1 having made flat products (steel sheets).

[0124] Then, by annealing the flat steel product in the duration of 45 seconds held device on the annealing temperature of 640 deg.] C, recrystallization of the cold-rolled flat products way is annealed in a continuous annealing furnace.

[0125] Thus heat treated steel sheet are listed in Table 1 in Table 2 Method and material parameters, wherein

[0126] -N (after nitriding) nitrogen content after nitriding annealing furnace,

[0127] -D is the plate thickness (in mm),

[0128] -NWG rolling, then the system (in%) during the second cold rolling,

[0129] -NH3 ammonia content (volume percent) of the annealing furnace,

[0130] -Rp0.5 was 0.5% yield strength in the rolling direction (in MPa),

[0131] -A elongation at break in the rolling direction (in...

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Abstract

The present invention relates to a cold-rolled flat steel product for packaging, having a thickness of less than 0.6 mm, which has been cold-rolled from steel along a rolling direction (0 degree) and which has an excellent isotropy with respect to its mechanical properties.

Description

Technical field [0001] The present invention relates to a cold-rolled flat steel product for packaging. Background technique [0002] In order to save resources and reduce costs, it is necessary to reduce the thickness of flat steel products (steel sheets and steel strips) for manufacturing packaging (hereinafter also referred to as packaging steel). The normal thickness of the cold-rolled packaging steel is between 0.1 and 0.6 mm in the fine plate range. However, since the thickness reduction results in a decrease in material, the strength of the packaging steel must be increased so that the material can withstand the requirements of cold deformation (e.g., in deep rushing or stretching) in the molding process when manufacturing the package. . However, at the same time, the energy moldability of the steel sheet must be ensured during cold deformation. Therefore, there is a need for a high strength steel sheet having grewer than 550 MPa yield limit, which simultaneously has a goo...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/42C22C38/44C22C38/48C22C38/50C22C38/54B05D7/14C21D8/02
CPCC22C38/04B21B1/28C21D7/13C21D9/56C22C38/02C22C38/06C22C38/001C22C38/42C22C38/50C22C38/54C22C38/48C22C38/44C22C38/008C21D8/0205C21D8/0226C21D8/0236C21D8/0247B05D7/14C21D8/0436C21D8/0426C21D8/0473C23C8/26C23C8/02C23C8/80C21D9/48B21C47/02C21D8/0273C21D8/0278B32B15/013C21D1/06C21D6/005C21D6/008C21D9/46C22C38/002
Inventor 布克哈德·考普布莱泽·马西科L-M·海涅
Owner THYSSENKRUPP AG
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