Most of the powder metallurgy gears are currently used in the automotive, mechanical, motorcycle, digital and electronic fields. Nowadays, small and precise gears are made of powder metallurgy. However, the powder metallurgy gears have their own performance, precision, strength, and hardness. It can be further improved.

1: How to improve the hardness of powder metallurgy gears

The hardness of the powder metallurgy gear is closely related to the density grade of the gear and the subsequent processing of some details. After the powder metallurgy gear is sintered, some treatment methods such as surface water vapor and carburizing treatment are added to improve the hardness of the gear, and can also improve the wear resistance of the treatment in use, and the service life is longer and safer.

2: How to improve the strength of powder metallurgy gears

From the aspect of gear raw materials, low carbon content, control the carburized layer, use a small amount of fine iron powder to increase the strength of the matrix material, or add some activated sintered auxiliary materials, which can effectively improve the strength of the gear.

3: How to improve the precision of powder metallurgy gears

The precision of powder metallurgy gears must control the expansion coefficient of the material and the precision of the mold. Jingshi recommends that the domestic mold for gears within 50 is about 8-9, and if it is imported from abroad, it is about 7-8, especially for oblique gears. The gear will be one level higher and the precision will be higher.