A kind of precision stamping cold-rolled steel plate for automobile safety belt buckle and its manufacturing method

A cold-rolled steel plate and precision stamping technology is applied to the cold-rolled steel plate for precision stamping automobile seat belt buckle and its manufacture, and the field of cold-rolled steel plate can solve the problems of being unsuitable for high-speed precision stamping, high hardness and low elongation, etc. Achieve moderate hardness, increase heat treatment hardness, and reduce strength

Active Publication Date: 2022-01-14
SHANGHAI MEISHAN IRON & STEEL CO LTD
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  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is to provide a precision stamping cold-rolled steel plate for automobile seat belt buckle and its manufacturing method, to solve the problem of high hardness and low elongation of the existing cold-rolled steel plate for precision stamping automobile seat belt buckle, which is not suitable for high-speed precision stamping technical issues

Method used

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  • A kind of precision stamping cold-rolled steel plate for automobile safety belt buckle and its manufacturing method
  • A kind of precision stamping cold-rolled steel plate for automobile safety belt buckle and its manufacturing method
  • A kind of precision stamping cold-rolled steel plate for automobile safety belt buckle and its manufacturing method

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Embodiment Construction

[0043] Below in conjunction with embodiment 1-5 the present invention is further described, as shown in table 1-4.

[0044] Table 1 is the chemical composition (by weight percentage) of the steel of the embodiment of the present invention, and the balance is Fe and unavoidable impurities.

[0045] Table 1 Chemical composition of the steel of the embodiment of the present invention, unit: weight percent.

[0046] element C Si mn P S Cr Al this invention 0.56-0.64 ≤0.2 0.3-0.5 ≤0.015 ≤0.005 0.15-0.25 0.01-0.04 Example 1 0.582 0.176 0.356 0.0135 0.0030 0.19 0.025 Example 2 0.619 0.128 0.375 0.0101 0.0013 0.17 0.017 Example 3 0.603 0.102 0.332 0.0122 0.0019 0.22 0.036 Example 4 0.593 0.132 0.412 0.103 0.0026 0.196 0.023 Example 5 0.613 0.152 0.385 0.116 0.0010 0.179 0.019

[0047] The molten steel that meets the basic requirements of the chemical composition is obtained through converter...

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Abstract

The invention discloses a cold-rolled steel plate for precision stamping automobile seat belt buckles and a manufacturing method thereof, which solves the problem of high hardness and low elongation of the existing cold-rolled steel plates for precision stamping automobile seat belt buckles and is not suitable for high-speed precision stamping technical issues. The present invention provides a cold-rolled steel plate for precise stamping automotive seat belt buckles, the weight percentage of its chemical composition is: C: 0.56-0.64%, Si≤0.20%, Mn: 0.3-0.5%, Al: 0.01-0.04%, Cr: 0.15‑0.25%, P≤0.015%, S≤0.005%, the rest is Fe and unavoidable impurities. Yield strength R of cold rolled steel plate P0.2 300‑350MPa, elongation after break A 50mm was 32‑38%. The cold-rolled steel plate of the invention is used for high-speed precision stamping to manufacture automotive safety belt buckles and other components.

Description

technical field [0001] The invention relates to a cold-rolled steel plate for precise stamping, in particular to a precision stamped cold-rolled steel plate for automobile seat belt buckles and a manufacturing method thereof, belonging to the technical field of iron-based alloys. Background technique [0002] Due to the high content of carbon and alloy elements, high carbon steel generally has high hardness and wear resistance after heat treatment, and is widely used in the manufacture of machinery and auto parts. With the development of the fine blanking industry in recent years, it has become an inevitable trend for fine blanking to replace ordinary stamping. Compared with ordinary stamping, precision stamping parts have the characteristics of high precision, good interchangeability, high yield and high efficiency. [0003] However, the forming process of fine blanking is complex, and the requirements for the internal quality of the material are very high. In order to ac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/04C22C38/06C22C38/02C22C38/18C21D8/02
CPCC22C38/04C22C38/06C22C38/02C22C38/18C21D8/0205C21D8/0226C21D8/0236C21D8/0273C21D2211/005C21D2211/009
Inventor 马植甄
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD
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