控轧控冷工艺对低碳贝氏体高强钢AH80DBD组织和力学性能的影响  

Effect of Controlled Rolling and Cooling Process on Microstructures and Mechanical Properties of Low Carbon Bainitic Steel AH80DBD

作　　者：陈尹泽[1] 李娜[1] 宋立伟[1] 马志强 Chen Yinze;Li Na;Song Liwei;Ma Zhiqiang(Technology Centre,Anyang Iron&Steel Group Co.,Ltd.,Anyang,455004)

机构地区：[1]安阳钢铁集团有限责任公司技术中心,安阳455004

出　　处：《特殊钢》2023年第1期97-100,共4页Special Steel

摘　　要：通过宏观断口、扫描断口、金相组织、透射电镜等方法分析了AH80DBD低碳贝氏体钢的组织结构对冲击性能的影响。试验结果表明:该钢轧后冷速22℃/s时,冲击韧性较好(-20℃AKV204~235 J),其组织为粒状贝氏体+板条贝氏体+细小的M-A,板条间距200~400 nm,而轧后冷速12℃/s时,板条间距~800 nm,-20℃AKV41~57 J,因此,AH80DBD钢在生产过程中冷却速率应≥20℃/s。The effect of microstructure on impact properties of AH80 DBD low carbon bainite steel is analyzed by macro-fractography,scanning fractography,metallography and transmission electron microscope.The experimental results show that by cooling rate 22℃/s after rolling,the microstructure with better impact toughness(-20℃AKV204-235 J)is granular bainite+Lath Bainite+fine M-A.With distance between lath 200-400 nm,by cooling rate 12℃/s after rolling,the distance between lath is~800 nm,and the-20℃AKVof steel is only 41-57 J.Therefore,the cooling rate of AH80 DB is greater than 20℃/s during production.

关 键 词：AH80DBD低碳贝氏体钢 轧后冷速 冲击功 组织性能 

分 类 号：TG142.1[一般工业技术—材料科学与工程] TG335[金属学及工艺—金属材料]