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Heat treatment process for automobile synchronizer ring gear cold rolling alloy-steel strip 16MnCr5

A synchronizer gear ring and alloy steel technology, which is applied in the field of metal heat treatment technology, can solve the problems of lack of perfect manufacturing standards and few varieties, etc.

Inactive Publication Date: 2016-08-24
SUZHOU XIANGLOU METAL PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

So far, there are few varieties, and there is no perfect manufacturing standard

Method used

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  • Heat treatment process for automobile synchronizer ring gear cold rolling alloy-steel strip 16MnCr5
  • Heat treatment process for automobile synchronizer ring gear cold rolling alloy-steel strip 16MnCr5

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Embodiment Construction

[0023] In order to deepen the understanding of the present invention, the present invention will be further described below in conjunction with the embodiments and accompanying drawings. The embodiments are only used to explain the present invention and do not constitute a limitation to the protection scope of the present invention.

[0024] A heat treatment process for a 16MnCr5 cold-rolled alloy steel strip for an automobile synchronizer gear ring, characterized in that the composition mass percentage of the 16MnCr5 cold-rolled alloy steel strip is: C (%): 0.14-0.19; Si (%): ≤0.4; Mn (%): 1.00-1.30; Cr (%): 0.80-1.10; P (%): ≤0.035; S (%): ≤.035, the heat treatment process steps are as follows:

[0025] 1. Take the hot-rolled steel coil 7.0*1250mm*C; pickling to remove the surface oxide layer, and then slitting;

[0026] 2. Slitting into coils 7.0*414mm*C, the first cold rolling to 6.5*414mm*C; the second cold rolling to 6.0*414mm*C; the third cold rolling to 5.5*414mm*C ;T...

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Abstract

The invention discloses a heat treatment process for an automobile synchronizer ring gear cold rolling alloy-steel strip 16MnCr5. The cold rolling alloy-steel strip 16MnCr5 comprises, by mass, 0.14-0.19% of C, no larger than 0.4% of Si, 1.00-1.30% of Mn, 0.80-1.10% of Cr, no larger than 0.035% of P and no larger than 0.035% of S. According to the heat treatment process, small-deformation rolling in 7-12 passes and 1-2 times of heat treatment annealing process enable a steel strip structure to gradually change to obtain a metallographic structure meeting fine blanking requirements, so that the ultimate object of replacing copper with steel is achieved; and the steel strip not only has the softness of a copper ring gear in property, but also is higher than the copper ring gear in intensity and abrasive resistance, the service life of an automobile ring gear is further prolonged, cost is further lowered, and a large quantity of non-ferrous metals are spared for the country.

Description

technical field [0001] The invention relates to the technical field of metal heat treatment technology, in particular to a 16MnCr5 heat treatment technology for a cold-rolled alloy steel strip of an automobile synchronizer gear ring. Background technique [0002] At present, most of the gear rings of automobile synchronizers are imported. Manufactured using brass alloy tubes, my country began to develop varieties of brass alloy tubes in 2004. So far, there are few varieties, and there is no perfect manufacturing standard. A commercial vehicle requires 0.5 kg of brass alloy pipe to manufacture a pair of synchronizer rings. [0003] Since 2009, my country has produced 13.79 million cars, surpassing Japan for the first time in the world. Until 2015, China ranked first in the world for seven consecutive years, with an average annual output of 20.436 million vehicles. The consumption of brass alloy pipes is nearly 10,210 tons, which is only the copper alloy resources consumed...

Claims

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Application Information

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IPC IPC(8): C22C38/18C22C38/04C22C38/02C21D8/02
CPCC22C38/18C21D8/0236C21D8/0268C21D8/0273C21D2211/009C22C38/02C22C38/04
Inventor 孙俊卿
Owner SUZHOU XIANGLOU METAL PROD
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