Study on CCT Curves of Cr3 Steel at Different Austenitizing Temperatures
In this paper,the expansion method,metallographic method and hardness method are used to measure the continuous cooling transformation curve of undercooled austenite in Cr3 backup roll steel for test,and the CCT curves at different austenitizing temperatures are compared.The results show that the microstructure of Cr3 backup roll steel for test changes from pearlite to bainite to martensite along with the increase of the cooling rate within a certain range,and the CCT curve shifts to the right at 890℃ austenitizing compared with that at 860℃ austenitizing,which provides a theoretical basis for the heat treatment process and application of back-up roll steel.
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