Thermal deformation behavior of Stellite 6B alloy

• Published in: IOP conference series. Materials Science and Engineering Vol. 1040; no. 1; pp. 12012 - 12020
• Main Authors: Yawei, Zhang, Shixiao, Zhang, Xudong, Lu
• Format: Journal Article
• Language: English
• Published: IOP Publishing 01.01.2021
• ISSN: 1757-8981; 1757-899X
• DOI: 10.1088/1757-899X/1040/1/012012

Stellite 6B is carbide-hardened Co-based superalloy. It finds extensive application in the harsh industrial environment, because of excellent wear characteristics, high hardness, good corrosion resistance, and superior mechanical properties. Hot compression tests were performed on Stellite 6B alloy to study high temperature dynamic recrystallization and microstructure evolution during thermal deformation. The tests were performed in the temperature 1000 °C, 1050 °C, 1100 °C, 1150 °C and 1200 °C and at the strain rates of 0.01 s−1, 0.1 s−1, 1 s −1 and 10 s−1. Stress-strain curves, and the microstructural evolution of the Stellite 6B alloy were investigated. The results showed that the recrystallization was nucleated at the carbides, original grain boundaries and twin grain boundaries, the dynamic recovery process is inhibited, and the softening effect by dynamic recrystallization is more significant.