Hot deformation behavior of C650R nickel-based heat-resistant alloy
The hot compression simulation tests of C650R nickel-based heat-resistant alloy were investigated using Gleeble-3800 thermal simulation test machine at deformation temperature of 950-1200℃and strain rate of 0.001-1 s-1.The hot deformation behavior and mi-crostructure evolution during hot deformation were investigated.The results show that the flow stress of C650R alloy increases rapidly with the increase of true strain,and then decreases significantly after exceeding the peak stress.The softening mechanism of C650R alloy is domi-nated by dynamic recrystallization.The contents of solid solution strengthening elements Co and Mo are reduced in C650R alloy.It has low deformation resistance and excellent hot forming performance.The hot processing maps of C650R alloy were constructed.Combined with mi-crostructure observation,the appropriate hot working range was determined:deformation temperature of 1060-1170℃,strain rate of 0.1-1 s-1.
NETL
NSTL
万方数据
