淬火和回火工艺对3.5Ni钢组织和力学性能的影响
发布时间：2018-11-04 12:46
【摘要】：通过拉伸和冲击试验以及SEM、TEM和EBSD组织观察,研究了不同热处理工艺参数对3.5Ni钢显微组织和力学性能的影响。结果表明:3.5Ni钢在860℃保温1 h水淬后得到细小的板条马氏体(LM)加粒状贝氏体(GB)组织;570℃回火后,LM的板条变粗,GB中的M/A岛也溶解消失,基体上有大量渗碳体析出。随着回火温度的升高,板条继续合并长大,并且开始出现多边形铁素体,渗碳体也不断长大。回火温度为570~600℃时,低温韧性随回火温度的升高而增加,但是继续升高回火温度会使得低温韧性下降。研究表明:3.5Ni低温钢经860℃水淬+600℃回火的热处理可以获得最佳的力学性能。
[Abstract]:The effect of different heat treatment process parameters on the microstructure and mechanical properties of 3.5Ni steel was studied by tensile and impact tests and the observation of SEM,TEM and EBSD microstructure. The results show that the fine lath martensite (LM) and granular bainite (GB) microstructure can be obtained by water quenching of 3.5Ni steel at 860 鈩，
本文编号：2309852
[Abstract]:The effect of different heat treatment process parameters on the microstructure and mechanical properties of 3.5Ni steel was studied by tensile and impact tests and the observation of SEM,TEM and EBSD microstructure. The results show that the fine lath martensite (LM) and granular bainite (GB) microstructure can be obtained by water quenching of 3.5Ni steel at 860 鈩，
本文编号：2309852
本文链接：https://www.wllwen.com/kejilunwen/jinshugongy/2309852.html
教材专著
