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Method for molding automobile transmission gearbox gear stand through powder metallurgy

A technology of gear bracket and powder metallurgy, which is applied in the field of auto parts manufacturing, can solve the problems that the parts are difficult to meet the requirements, and achieve the effect of good hardness, uniform overall density, and improved quality and performance

Inactive Publication Date: 2019-05-07
益阳市再超粉末冶金有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the development of industry, the requirements for parts are getting higher and higher. Due to the influence of cost, delivery cycle and noise, it is often difficult for machined parts to meet the requirements.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A method for forming a gear bracket of an automobile transmission gearbox by powder metallurgy, comprising the following steps:

[0025] S1. Raw material mixing: Weigh 120 parts of iron powder, 2.0 parts of graphene, 2.0 parts of nickel powder, 2.0 parts of manganese powder, 0.8 parts of lubricant, 0.2 parts of silane coupling agent, 4 parts of copper powder, 1.0 part of chromium powder, zinc Add 1.5 parts of powder, 0.15 parts of silicon dioxide, 2 parts of tungsten carbide, and 1.0 part of titanium powder into a high-speed ball mill for grinding and mixing to obtain a uniform mixture;

[0026] S2. Compression: Infiltrate the inner wall of the pressing mold with a powder metallurgy release agent, then add the mixture obtained in S1 into the pressing mold for pressing and molding, and make a blank of the gear bracket of the automobile transmission gearbox; the pressing pressure is 500-550MPa , the pressing density of the blank is 6.8-7.3g / cm 3 ;

[0027] S3. Drying: p...

Embodiment 2

[0035] A method for forming a gear bracket of an automobile transmission gearbox by powder metallurgy, comprising the following steps:

[0036] S1. Raw material mixing: Weigh 100 parts of iron powder, 1.0 part of graphene, 1.0 part of nickel powder, 1.0 part of manganese powder, 0.6 part of lubricant, 0.1 part of silane coupling agent, 3 parts of copper powder, 0.5 part of chromium powder, zinc Add 1.0 part of powder, 0.1 part of silicon dioxide, 1 part of tungsten carbide, and 0.5 part of titanium powder into a high-speed ball mill for grinding and mixing to obtain a uniform mixture;

[0037] S2. Compression: Infiltrate the inner wall of the pressing mold with a powder metallurgy release agent, then add the mixture obtained in S1 into the pressing mold for pressing and molding, and make a blank of the gear bracket of the automobile transmission gearbox; the pressing pressure is 500-550MPa , the pressing density of the blank is 6.8-7.3g / cm 3 ;

[0038] S3. Drying: place the ...

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Abstract

The invention discloses a method for molding an automobile transmission gearbox gear stand through powder metallurgy. The method comprises the steps of raw material mixing, pressing, drying, sintering, quenching, tempering, finishing, rust prevention and the like. Raw materials comprise, by weight part, 100-120 parts of iron powder, 1.0-2.0 parts of graphene, 1.0-2.0 parts of nickel powder, 1.0-2.0 parts of manganese powder, 0.5-0.6 part of a lubricating agent, 0.1-0.2 part of a silane coupling agent, 3-4 parts of copper powder, 0.5-1.0 part of chromium powder, 1.0-1.5 parts of zinc powder, 0.1-0.15 part of silicon dioxide, 1-2 parts of tungsten carbide and 0.5-1.0 part of titanium powder. According to the method, the raw material formula is reasonable, the process is simple, and the production efficiency is high. The automobile transmission gearbox gear stand prepared through the method has the beneficial effects of uniform in overall density, good in strength and hardness, good in rust prevention performance and the like.

Description

technical field [0001] The invention relates to the field of auto parts manufacturing, in particular to a powder metallurgy forming method for a gear bracket of an automobile transmission gearbox. Background technique [0002] With the development of industry, the requirements for parts are getting higher and higher. Due to the influence of cost, delivery cycle and noise, it is often difficult for machined parts to meet the requirements. Powder metallurgy is a technology that can manufacture parts with complex shapes. It has the characteristics of saving raw materials, energy and labor, and is suitable for mass production. Because the gear bracket manufactured by powder metallurgy has higher porosity than the cast gear bracket, the strength, hardness, and overall density uniformity of the gear bracket are affected to a certain extent. Contents of the invention [0003] The object of the present invention is to provide a kind of molding method of powder metallurgy manufact...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/04C22C38/42C22C38/44C22C38/50C22C38/58C22C33/02C21D1/18C21D9/00B22F3/02B22F3/10B22F3/24
Inventor 李建峰钟训华钟智超符人慧
Owner 益阳市再超粉末冶金有限公司
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