Surface Treatment Process of Powder Metallurgy Parts

Surface Treatment Process of Powder Metallurgy Parts

What is the surface treatment process of powder metallurgy parts? In order to improve the wear resistance, corrosion resistance and fatigue strength of powder metallurgy parts, it is necessary to conduct surface treatment on powder metallurgy parts to make their surfaces more functional and compact. So, what is the surface treatment process of powder metallurgy parts? Zhugnwei powder metallurgy manufacturers share:

powder metallurgy

1. Surface heat treatment: Phase change occurs through temperature cycling, which changes the surface microstructure of the treated parts.

2. Mechanical deformation method: mechanical deformation occurs on the surface of the treated part, which mainly generates compressive residual stress and increases the surface density.

3. Coating: apply a layer of other materials on the surface of the treated parts without any chemical reaction;

4. Surface chemical treatment: chemical reaction between the treated part surface and external reactants;

5. Chemical heat treatment: other elements, such as C and N, diffuse to the treated part surface.

The above is an introduction to the surface treatment process of powder metallurgy parts. In principle, all surface treatment processes used for dense steel products can be used for iron based powder metallurgy materials, but two preconditions must be considered: one is to maintain accurate dimensional tolerance, because powder metallurgy parts have strong competitiveness after treatment. If the surface treatment process is used to make the powder metallurgy parts lose this advantage, it cannot be applied.