Hot Deformation Behavior and Processing Diagram of As-cast Cu-1.16Ni-0.36Cr Alloy
SUN Wenming1, LI Shaolin1,2, SONG Kexing1,2,3,*, WANG Qiangsong4,5,*, DING Zongye6, ZHU Yingying1
1 School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471023, Henan, China 2 Henan Key Laboratory of Non-ferrous Materials Science and Processing Technology, Henan University of Science and Technology, Luoyang 471023, Henan, China 3 Henan Academy of Sciences, Zhengzhou 450052, China 4 State Key Laboratory of Nonferrous Metals and Processes, GRINM Group Co., Ltd., Beijing 100088, China 5 GRIMAT Engineering Institute Co., Ltd., Beijing 101407, China 6 School of Mechanical and Electrical Engineering and Automation, Foshan University, Foshan 528225, Guangdong, China
Abstract: Hot compressive deformation behavior of Cu-1.16Ni-0.36Cr alloy at the temperatures from 750 ℃ to 950 ℃ and the strain rates from 0.01 s-1 to 10 s-1 was studied on a Gleeble-1500 thermal simulator. The constitutive equation and processing diagram of the alloy were established. The results showed that the dynamic recovery of Cu-1.16Ni-0.36Cr alloy was dominant at the strain temperature between 700 ℃ to 900 ℃, and dynamic recrystallization took place at 950 ℃. The constitutive equation and processing diagram were obtained by the true stress-strain curve. Based on the effect of strain on flow stress, the constitutive equation was modified. The flow stress was simulated by regression equation, and the results were in good agreement with the experimental results. The processing diagram showed that the suitable thermal deformation parameters were 900—950 ℃ of deformation temperatures and 0.1—1 s-1 of strain rate. Equiaxed grains with fine grains are obtained at appropriate defor-mation parameters, which were 950 ℃ of temperature and 1 s-1 of strain rate.
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2024, Vol. 38 
