Effect of High Temperature Deformation Parameters on Microstructure Evolution of 4J32 Super Invar Alloy
The microstructure and morphology of the alloy were characterized by metallographic microscope and thermal simulation test and other equipment,and the thermal deformation parameters were set at different strain temperatures of 850-1 150 ℃ and strain rates of 0.1-10 s-1.It was analyzed by combining the stress-strain curve of thermal simulation com-pression test and the microstructure morphology,the thermal deformation behavior and microsturcture morphology evolu-tion process of 4J32 super invar alloy(Fe-32Ni-4Co)at high temperature 850-1 150 ℃ were systematically studied.It is found that no dynamic recrystallization occurs during hot deformation of 4J32 super invar alloy below 900 ℃,and there are a lot of deformed grain structures in the alloy.When the thermal deformation temperature is greater than 1 050 ℃,the dy-namic recrystallization of the alloy begins,and the faster the strain rate,the higher the dynamic recrystallization degree.The results show that the optimum thermal deformation temperature of super invar alloy is greater than 1 100 ℃ and the strain rate is 10 s-1.
4J32 Super Invar AlloyThermal SimulationDynamic RecrystallizationMicrostructure
万方数据
维普
