Influence of cooling way on microstructure and stress rupture property of DZ951 nickel base alloy

来源期刊：中国有色金属学报(英文版)2005年第z3期

论文作者：夏鹏成 于金江 孙晓峰 管恒荣 胡壮麒

文章页码：90 - 93

Key words：heat treatment； cooling； microstructure； stress rupture life

Abstract: The influence of different cooling during heat treatment on microstructure and stress rupture property of DZ951 alloy was investigated by optical microscope, SEM and TEM. The results show that the shape of MC carbide changes from Chinese script in as-cast alloy to small block with different cooling ways. The size of γ′ phase decreases and the shape of γ′ phase changes from cuboid to sphere with the increase of cooling rate. The γ′ phase splits into eight small cuboids when the alloy is cooled by furnace cooling. The stress rupture life of the samples by air cooling is superior to that by other cooling way.