回火保温时间对新型贝氏体铸钢组织和性能的影响  

Influence of Tempering Time on Microstructure and Properties of New Type Bainite Cast Steel

作　　者：程巨强[1] 刘志学[1] 

机构地区：[1]西安工业学院材料与化工学院,陕西西安710032

出　　处：《铸造技术》2005年第11期994-996,共3页Foundry Technology

摘　　要：研究了回火保温时间对ZG30CrMn2Si2Mo新型贝氏体钢组织和力学性能的影响。结果表明,不同回火时间下材料的组织为贝氏体铁素体和残余奥氏体组成,2 h以下回火材料的强度、韧性、硬度升高,超过2 h回火,随着回火时间的增加,材料的硬度、韧性趋于稳定,超过3 h回火抗拉强度保持稳定,随着回火时间增加,组织中的残余奥氏体量减少。ZG30CrMn2Si2Mo长时间回火对性能不敏感。The influence of tempering time on the microstructure and mechanical properties of ZG30CrMn2Si2Mo new type bainite cast steel were studied. The experiment results show that the microstructure of test cast steel is lath bainite and retained austenite at various tempering holding time. The strength, toughness and hardness of test steel increase until at tempering of 2 h. The toughness and hardness of test steel remain almost constant after tempering of 2 h, the strength tempering time, the retained austenite tempering. remains almost constant after tempering of 3 h. With increasing the decreases. The mechanical properties is not susceptibility to long time

关 键 词：ZG30CrMn2Si2Mo钢 回火 保温时间 组织 性能 

分 类 号：TG156.5[金属学及工艺—热处理]