Effect of quenching process on microstructure and properties of new corrosion and wear resistant steel
LIANG Liang1,2, YAN Li-xin1, DENG Xiang-tao2, LIU Ning1, WANG Jing1, WANG Zhao-dong2
1. Hunan Valin Lianyuan Iron and Steel Co., Ltd., Loudi 417009, Hunan, China; 2. The State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110819, Liaoning, China
Abstract：In order to obtain novel corrosion and wear resistant steel with excellent comprehensive properties, the effect of quenching process on the microstructure and properties of 1.0Cr and 3.5Cr steels was investigated. The microstructure and properties of the two steels under different quenching processes were observed and analyzed by means of field emission scanning electron microscope, transmission electron microscope, tensile and impact testing. The results show that the quenching temperature affects the mechanical properties of the two steels by affecting the grain size and the degree of carbide dissolution. When the quenching temperature is 900 ℃, the comprehensive mechanical properties of the two steels are the best. When the quenching temperature is lower than 900 ℃, the uneven grain size of 1.0Cr steel leads to relatively poor mechanical properties, while the dispersed carbides in 3.5Cr steel hinders the growth of original austenite grain, so its mechanical properties are better than that of 1.0Cr steel at the same quenching temperature. When the quenching temperature rises to 960 ℃, due to the complete dissolution of Cr carbide, the grain size of two steels is significantly increased, and the mechanical properties are relatively reduced. The results provide process guidance for new corrosion and wear resistant steel with optimal performance.
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2023, Vol. 33 
