Surface treatment process of powder metallurgy parts?
Dec 02, 2022
Surface treatment process of powder metallurgy parts?
In order to improve the wear resistance, corrosion resistance and fatigue strength of powder metallurgy parts, the surface treatment of powder metallurgy parts is to make their surfaces more functional and compact. So, what is the surface treatment process of powder metallurgy parts? According to Zhongwei Precision Technology, the surface treatment technology of powder metallurgy parts can be basically divided into the following five categories:
1. Coating: the surface of the treated part is covered with other materials without chemical reaction
2. Surface chemical treatment: chemical reaction between the surface of treated parts and reactants
3. Chemical heat treatment: other elements such as c and n diffuse to the surface of the treated parts
4. Surface heat treatment: the temperature cycle changes to produce phase transformation, which changes the microstructure of the surface of the treated material
5. Mechanical deformation method: deform the mechanism on the surface of the treated material, mainly producing compressive residual stress, and also improving the surface density.
The surface treatment technology of powder metallurgy parts is introduced above. In principle, the surface treatment technology applied to dense steel products is applicable to iron based powder metallurgy materials, but two preconditions must be considered. First of all, under the correct dimensional tolerance that can maintain the strong competitive advantages of powder metallurgy parts after treatment, the surface treatment process used cannot be applied if it loses the advantages of powder metallurgy parts. Secondly, because powder metallurgy parts contain voids, it has a significant impact on the existing surface treatment.
