Cold-rolled fine-punched steel strip for automobile child seat locking device and preparation method thereof

A technology of child seat and locking device, which is applied in the field of steel strip preparation, can solve problems such as parts cracking, achieve stable and uniform performance, and improve the quality of the section

Inactive Publication Date: 2018-08-10
SUZHOU XIANGLOU METAL PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the part needs to be heat treated after stamping (quenching at 850°C + tempering at 390°C) and electroplating, it will inevitably be affected by hydrogen embrittlement, resulting in cracking during the test of the part

Method used

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  • Cold-rolled fine-punched steel strip for automobile child seat locking device and preparation method thereof

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Embodiment

[0042] An embodiment of the cold-rolled fine-blanking steel strip for the locking device of the automobile child seat of the present invention, the material of the cold-rolled fine-blanking steel strip is 51CrV4, and the composition of the cold-rolled fine-blanking steel strip includes:

[0043] C(%): 0.50-0.55, Si(%): 0.15-0.35, Mn(%): 0.80-1.10, P(%)≤0.015, S(%)≤0.01, Cr(%): 0.90-1.20, V(%): 0.10-0.20, Al(%)≤0.035.

[0044] In this embodiment, the method for preparing the cold-rolled fine-blanking steel strip for the locking device of the car child seat comprises the following steps:

[0045] 1. Take the hot-rolled steel coil 4.5*1250mm*C: pickling to remove the surface oxide layer, and then slitting.

[0046] 2. Slitting to 4.5*234mm*C, annealing the small roll blank.

[0047] The specific annealing process is as follows:

[0048] 1) Heat to 250°C for 2 hours to remove moisture and oil on the surface of the steel strip. Ensure the inner vacuum, and then rush into the hy...

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Abstract

The invention discloses a cold-rolled fine-punched steel strip for an automobile child seat locking device. The cold-rolled fine-punched steel strip is made of 51CrV4, and comprises the following components by mass percentage: 0.50-0.55 of C, 0.15-0.35 of Si, 0.80-1.10 of Mn, less than or equal to 0.015 of P, less than or equal to 0.01 of S, 0.90-1.20 of Cr, 0.10-0.20 of V, and less than or equalto 0.035 of Al. Directed at the special processing technology and application requirements of the child seat locking device, the cold-rolled fine-punched steel strip provided by the invention rationally optimizes the chemical components of 51CrV4, and rationally controls the C, S, P, Si and other elements sensitive to hydrogen embrittlement.

Description

technical field [0001] The invention relates to the field of steel strip preparation, in particular to a cold-rolled fine-blanking steel strip for an automobile child seat locking device and a preparation method thereof. Background technique [0002] A safety seat is a seat specially designed for children of different weights (or age groups), installed in a car, and can effectively improve the safety of children in a car. In the event of a car collision or sudden deceleration, it can reduce the impact on children and limit their body movement so as to reduce their injuries. The China Business Industry Research Institute predicts that the output of child safety seats in China will reach 16.08 million in 2017. [0003] The spare parts of children's car safety seats mainly include: seat body, locking device, seat belt buckle, webbing, ISOFIX interface, among which the manufacturing level of the seat body is an important embodiment of the production level of the child safety se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/24C22C38/06C21D8/02C21D1/20
CPCC22C38/02C21D1/20C21D8/0236C21D8/0268C21D2211/009C22C38/04C22C38/06C22C38/24
Inventor 唐卫国
Owner SUZHOU XIANGLOU METAL PROD
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