Abstract：Foreign matter on the surface of a powder metallurgy part of a compressor resulted in the failure of the
product. The pores and oxides on the surface of the part were observed by scanning electron microscopy. The
results showed that there were many open pores on the surface of the part after machining because of insufficient
steam oxidation reaction inside the part. By analyzing the steam treatment process of the failed parts, it is found
that the reason is the improper setting of steam treatment temperature and time, and further reveals the failure
mechanism. By improving the powder proportion of matrix material, forming density and steam treatment technology,
the problem of foreign matter precipitation on the surface of parts was effectively solved.
李子阳，骆文锋，左新浪，张坤，朱刚. 铁基粉末冶金零件表面异物析出原因分析和改进措施[J]. 粉末冶金工业, 2022, 32(03): 122-126.
LI Ziyang，LUO Wenfeng，ZUO Xinlang，ZHANG Kun，ZHU Gang. Cause analysis of foreign matter precipitation on the surface of ferrous P/M parts and countermeasures. Powder Metallurgy Industry, 2022, 32(03): 122-126.
2022, Vol. 32 
