热处理工艺对Cr15Ni2MnMoCuNbRE铸钢组织及性能的影响  

Effect of heat treatment process on microstructure and properties of Cr15Ni2MnMoCuNbRE cast steel

作　　者：宋延沛 陈丹萍[1] 周汉 林小丽 李丽 Song Yanpei;Chen Danping;Zhou Han;Lin Xiaoli;Li Li(School of Mechatronics Engineering,Hainan Vocational University of Science and Technology,Haikou Hainan 570100,China;School of Materials Science and Engineering,Henan University of Science and Technology,Luoyang Henan 471023,China)

机构地区：[1]海南科技职业大学机电工程学院,海南海口570100 [2]河南科技大学材料科学与工程学院,河南洛阳471023

出　　处：《金属热处理》2022年第2期178-182,共5页Heat Treatment of Metals

基　　金：河南省科技发展项目(122102210134)。

摘　　要：采用扫描电镜、力学性能试验机和腐蚀磨损试验机研究了热处理工艺对Cr15Ni2MnMoCuNbRE铸钢组织、力学性能和耐腐蚀磨损性能的影响。结果表明,试验钢经860℃处理后的组织为奥氏体+晶界网状碳化物,热处理加热温度升高,试验钢的组织和性能均得到不同程度的改善。当加热温度从860℃升至1000℃后,试验钢组织中晶界碳化物减少,形态改善,碳化物由晶界网状转变为细棒状,力学性能和耐腐蚀磨损性能显著提高。与加热温度860℃处理的试验钢相比,加热温度为1000℃处理的试验钢,其硬度和冲击吸收能量分别提高了5.9%和49.8%,达到了57.5 HRC和35.5 J,耐腐蚀磨损性能提高了1.88倍。Microstructure, mechanical properties and corrosive wear resistance of the Cr15 Ni2 MnMoCuNbRE cast steel treated by different heat treatment processes were investigated by means of SEM, mechanical property testing machine and corrosion-wear tester. The results show that the microstructure of the tested steel treated at 860 ℃ consists of austenite and network carbide. With the increase of heat treatment temperature, the microstructure and properties of the tested steel are improved. When heating temperature increases from 860 ℃ to 1000 ℃, the intergranular carbide amount of the tested steel decreases, the carbide morphology changes from network into fine rod shape, and the mechanical properties and corrosive wear resistance of the tested steel are improved significantly. Compared with that heat treated at 860 ℃, the hardness and impact absorbed energy of the tested steel heat treated at 1000 ℃ are increased by 5.9% and 49.8%, respectively, which reach 57.5 HRC and 35.5 J, and the corrosive wear resistance is increased by 1.88 times.

关 键 词：Cr15Ni2MnMoCuNbRE铸钢 热处理工艺 组织 力学性能 耐腐蚀磨损性能 

分 类 号：TG243[金属学及工艺—铸造]