摘要
对铸造马氏体不锈钢(MSS)进行了退火和淬火处理,然后在不同温度下进行回火处理。利用金相显微镜(OM)和扫描电子显微镜(SEM)表征了不锈钢经不同处理后的显微组织,借助能谱分析仪(EDS)、硬度计检测了不锈钢的物相成分和力学性能。同时结合JMatPro模拟计算结果,深入分析了组织演变过程与力学性能变化关系。结果表明:随着回火温度升高,板条状马氏体转变为隐针状回火马氏体,第二相碳化物长大。针状马氏体结合紧密,第二相钉扎晶界,造成不锈钢硬度在一定范围内有所提升。
In this paper,the as-cast martensitic stainless steels(MSS)were annealed and quenched,and then tempered at different temperatures.The microstructure of stainless steel via different treatments was characterized by metallographic microscope(OM)and scanning electron microscope(SEM).The phase composition and mechanical properties of stainless steel were detected by energy dispersive analyzer(EDS)and hardness tester.Then,combined with the simulation results onJMatPro,the relationship between the evolution process of the microstructure and change of mechanical properties was deeply analyzed.The results show that:as the tempering temperature increases,the lath martensite transforms into acicular tempered martensite,and the second phase carbide grows.The acicular martensite is closely combined,and the second phase pinches the grain boundaries,resulting in an increase in the hardness of stainless steel within a certain range.
作者
狄崇祥
李克雷
荆静
倪钧
赵平
于立岩
DI Chong-xiang;LI Ke-lei;JING Jing;NI Jun;ZHAO Ping;YU Li-yan(College of Material Science and Engineering,Qingdao University of Science and Technology,Qingdao 266042,Shandong,China;Shandong Chenzhong Machinery Co.,Ltd.,Zibo 256402,Shandong,China)
出处
《铸造》
CAS
北大核心
2022年第12期1499-1504,共6页
Foundry
关键词
马氏体不锈钢
回火工艺
硬度
第二相碳化物
martensitic stainless steel
tempering process
hardness
second phase carbides
