铁基粉末冶金零件表面异物析出原因分析和改进措施  

Cause analysis of foreign matter precipitation on the surface of ferrous P/M parts and countermeasures

作　　者：李子阳 骆文锋 左新浪 张坤 朱刚 LI Ziyang;LUO Wenfeng;ZUO Xinlang;ZHANG Kun;ZHU Gang(Reliability Research and Analysis Center,China Electronic Product Reliability and Environmental Testing Research Institute,Guangzhou 511370,China)

机构地区：[1]中国电子产品可靠性与环境试验研究所可靠性研究分析中心,广东广州511370

出　　处：《粉末冶金工业》2022年第3期122-126,共5页Powder Metallurgy Industry

摘　　要：某压缩机粉末冶金零件表面异物析出导致产品失效,通过扫描电镜对零件表面孔隙和氧化物进行观察,结果表明由于零件内部蒸汽氧化反应不够充分,导致零件经过机加工后表面存在较多开放的孔隙。对失效零件的蒸汽处理工艺进行分析,发现了其原因是由于蒸汽处理温度和时间设置不当,并进一步揭示了失效机理。通过改善基体材料粉末比例、成形密度和蒸汽处理工艺,有效解决了零件表面异物析出问题。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.

关 键 词：铁基粉末冶金 蒸汽处理 异物析出 增重比 Fe-Cu-C 

分 类 号：TF125[冶金工程—粉末冶金]