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
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[0023] Example 1
[0024] A method for forming a gear bracket of an automobile gearbox made by powder metallurgy includes the following steps:
[0025] S1. Mixing of raw materials: 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 1.5 parts of powder, 0.15 parts of silicon dioxide, 2 parts of tungsten carbide, and 1.0 part of titanium powder are added to a high-speed ball mill for grinding and mixing to obtain a uniformly mixed mixture;
[0026] S2. Pressing: Infiltrate the inner wall of the pressing mold with a powder metallurgy release agent, and then add the mixture obtained from S1 to the pressing mold for pressing to form a rough part of the automobile gearbox gear bracket; the pressing pressure is 500-550MPa , The pressed density of the blank is 6.8-7.3g / cm 3 ;
[0027] S3. Drying: Place the blank...
Example Embodiment
[0034] Example 2
[0035] A method for forming a gear bracket of an automobile gearbox made by powder metallurgy includes the following steps:
[0036] S1. Mixing of raw materials: 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 to a high-speed ball mill for grinding and mixing to obtain a uniformly mixed mixture;
[0037] S2. Pressing: Infiltrate the inner wall of the pressing mold with a powder metallurgy release agent, and then add the mixture obtained from S1 to the pressing mold for pressing to form a rough part of the automobile gearbox gear bracket; the pressing pressure is 500-550MPa , The pressed density of the blank is 6.8-7.3g / cm 3 ;
[0038] S3. Drying: Place the blanks of the automo...
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