超低碳SiCrMn2Ni4钢连续冷却转变行为研究  

Study on Continuous Cooling Transformation Behavior of Ultra-low Carbon SiCrMn2Ni4 Steel

作　　者：陈雪龙 王其红[1] 王任甫[1] 杨超飞[1] 张玉祥[1] CHEN Xuelong;WANG Qihong;WANG Renfii;YANG Chaofei;ZHANG Yuxiang(Luoyang Ship Material Research Institute,Luoyang 471023 ,China)

机构地区：[1]中国船舶重工集团公司第七二五研究所,河南洛阳471023

出　　处：《材料开发与应用》2019年第2期43-48,共6页Development and Application of Materials

摘　　要：研究了超低碳SiCrMn2Ni4钢钢连续冷却过程,采用金相显微镜、SEM和TEM对组织进行观察分析。结果表明,试验钢在连续冷却后,只存在粒状贝氏体和板条状贝氏体组织。随着冷却速度的加快,组织逐渐由粒状贝氏体向板条状贝氏体转变,当冷却速度增加至5℃/s时,出现粒状贝氏体与板条状贝氏体的混合组织,冷却速度大于等于20℃/s时,组织全为板条状贝氏体。The continuous cooling process of ultra-low carbon SiCrMn2Ni4 steel was simulated. Microstructure was observed and analyzed by metallographic microscope, SEM and TEM. The results showed that only granular bainite and lath bainite existed in the experimental steel after continuous cooling. With the increasing of cooling rate, granular bainite turned into lath bainite gradually. When the cooling rate increased to 5 ℃/s, a mixture of granular bainite and lath bainite appeared. When the cooling rate was no lower than 20 ℃/s, the microstructure was all lath bainite.

关 键 词：4Ni超低碳贝氏体 粒状贝氏体 板条状贝氏体 

分 类 号：TG401[金属学及工艺—焊接]