Metallographic Analysis on Common Defects in Fe-based Powder Metallurgy Parts

Metallographic sample preparation and etchant selection for Fe-based powder metallurgy parts were introduced, and metallographic method was utilized to analyze some defects in Fe-based powder metallurgy parts. The results show that:the defects of parts would occur in the process of mixing, compaction, sintering, heat treatment and so on due to improper storage and processing technology; by metallographic analysis and comparison on defect parts and normal parts, root causes for defects could be concluded and used for processing guidance and quality improvement.