Two Usual Surface Treatments on Sintered Gears

With the development of powder metallurgy, powder metallurgy parts are applied more widely for industry, especially sintered gears, which are sharing most of PM market.

As the important part of machinery products, the demand is huge. Powder metallurgy is used to make various gears with various shapes and properties for different industries, which usually in automotive engines, motorcycles, etc, contribute much to the development of economy.

The treatment in the production is a problem in the production of sintered gears. Normally, the usually treatments consist of steam treatment and carburization.

Steam treatment is a process that under the high temperature, water vapor reacts with Fe on the surface of sintered gears, and forms a layer of compacted Fe3O4 with high density, therefore will better hardness and wear resistance.

Carburization is a chemical heating treatment that raises the carbon composition to improve the mechanical properties.

Sints has already brought in sets of  equipments to supply steam treatment and carburization. Besides Sints has introduced a pressing machine with a tonnage of 800T, which is the biggest in south China, which can achieve a gear with large weight and high density, which is best available for auto gears.