Hardness of powder metallurgy gear

Hardness of powder metallurgy gear

What factors generally affect the hardness of powder metallurgy gears, and how can we improve the hardness of powder metallurgy gears? Qinhuangdao Zhongwei Precision Powder Metallurgy Gear Manufacturer will share with you:

1. In order to improve the strength and wear resistance of P/M gears, we usually need to add post-processing engineering after sintering of P/M gears to improve their performance. For example, after treatment of gears, engineers generally use surface steam treatment and carburizing treatment to increase the wear resistance and surface hardness of products.

Powder metallurgy gear

2. The precision of powder metallurgy gears depends on the expansion coefficient of materials and the precision of dies. Generally, the domestic dies for gears with diameters less than 50 are about 8-9 grades, and the imported dies are 7-8 grades. If the helical gears are used, they will be a higher grade.

3. The common powder metallurgy gear can bear torque up to 14NM, and the warm pressed parts can reach 20NM. If the warm pressed parts can reach about 25, it can be slightly increased by 30-40% under the condition that the full set of gears are designed by professional powder metallurgy and can be modified.

4. Gear hardness is closely related to product material, density grade and post-treatment.

The above is the knowledge about the hardness of powder metallurgy gears. Now do you know what factors affect the hardness of powder metallurgy gears and how to improve it? If you have any needs or questions, you can call zhongwei Precision Powder Metallurgy Gear Manufacturer in Qinhuangdao.