摘要
P92钢经过不同温度和冷却方式回火处理后,检测了其显微组织、硬度及力学性能的变化,研究了回火热处理对P92钢性能的影响。试验结果表明,P92钢在高温回火(830℃)时,其显微组织由马氏体逐渐转变为铁素体加碳化物,抗拉强度、冲击吸收能量没有降低,但硬度和屈服强度却明显降低(低于标准要求的下限值)。另外,在低于AC1线的高温回火时,冷却速度对材料性能及显微组织影响不大。
After T92 steel was tempered at different tempering temperature and by different cooling methods,the variations of properties of T92 steel,such as the microstructure,the hardness and the mechanical properties,were detected.The influence of the tempering treatment on the characteristics of P92 steel was researched.The experiment results show that after high temperature tempering(830 ℃),the microstructure of the T92 steel changed from martensite into ferrite and carbide gradually,the tensile strength and the shock absorbing energy of the steel did not reduce,but the hardness and the yield strength of the steel reduced obviously(lower than the lower limit value required by relevant standard).On the side,in high temperature tempering process below AC1 line,the cooling speed does not much impact the properties and the microstructure of the material.
出处
《华电技术》
CAS
2013年第3期22-25,78,共4页
HUADIAN TECHNOLOGY
关键词
P92钢
回火处理
力学性能
显微组织
P92 steel
tempering treatment
mechanical property
microstructure
