摘要
本文研究了Rene′95合金粉末经不同温度预热处理再热等静压(HIP)后合金原始颗粒边界(PPB)碳化物析出、γ′含量及晶粒度的变化;探讨了采用粉末预处理方法减少HIP Rene′95合金PPB碳化物聚集的可能性。结果表明:预处理可以明显改善HIP Rene′95合金PPB碳化物的聚集程度,并且增加合金γ′含量而不改变合金的晶粒度。指出,这是由于预处理改善了HIP前粉末颗粒的表面状态,改变了碳化物在PPB的形核条件所致。
The effect of various Pre-HIP heat treatments on the size and distribution of Prior Particle Boundary(PPB) carbide precipitaties, γ' volume fraction and grain size of HIP billets of Rene'95 P/M alloy has been studied. And the possibility of the elimitation of PPB carbide segregation by using Pre-HIP heat treatment has been explored. The results show that Pre-HIP heat treatment can reduce the degree of PPB carbide segregation, increase the γ' volume fraction, but leave the grain size unchanged. This is mainly due to the improvement of Pre-HIP powder surface state, and precipitating environment of carbides on PPB.
出处
《粉末冶金技术》
CAS
CSCD
北大核心
1989年第4期213-219,共7页
Powder Metallurgy Technology
