U75V轨道钢中片状珠光体的相场模拟研究  

Simulated Study on Phase-Fields of Lamellar Pearlite in U75V Rail Steels

作　　者：贾宏斌 姜圆博 李彬周 廖德勇 金纪勇 王文强 JIA Hongbin;JIANG Yuanbo;LI Binzhou;LIAO Deyong;JIN Jiyong;WANG Wenqiang(State Key Laboratory of Metal Materials for Marine Equipment and Application,Anshan 114009,Liaoning,China;Ansteel Iron and Steel Research Institutes,Anshan 114009,Liaoning,China;Ansteel Beijing Research Institute Co.,Ltd.,Beijing 102200,China;Department of Mechanical Engineering,Tsinghua University,Beijing 100084,China)

机构地区：[1]海洋装备用金属材料及其应用国家重点实验室,辽宁鞍山114009 [2]鞍钢集团钢铁研究院,辽宁鞍山114009 [3]鞍钢集团北京研究院有限公司,北京102200 [4]清华大学机械工程系,北京100084

出　　处：《鞍钢技术》2024年第6期104-109,共6页Angang Technology

摘　　要：为了深入了解片层状珠光体的生长情况,借助相场法并结合COMSOL软件,对U75V轨道钢进行了微观组织模拟,探讨了冷却速度对珠光体片层间距的影响,并与U75V钢的实际组织进行了对比分析。结果表明,在0.8℃/s和2.3℃/s两种冷却速度下,由相场法模拟得到的片状珠光体的片层平均间距分别为0.24μm和0.18μm。此外,与U75V钢实际微观组织进行对比分析,发现相场法仿真结果与实测值基本一致,表明建立的相场模型以及选用的物性参数符合实际情况。In order to deeply understand the growth of lamellar pearlite in U75V rail steels,the microstructures in U75V rail steels were studied simulatively by means of the phase-field method together with the COMSOL software,while the effect of cooling rates on the interlamellar spacing of pearlite was discussed.And then the simulated microstrutures were compared to the actual microstructures in U75V steels and analyzed.The analytical results showed that the average lamella spacing of lamellar pearlite obtained by phase-field simulation at two different cooling rates of 0.8℃/s and 2.3℃/s was 0.24μm and 0.18μm respectively.In addition,based on contrastive analysis over actual microstructures in U75V steels and simulated microstructures obtained by phase-field method,it was found that the simulated results were basically consistent with the measured values,which demonstrated that the established phase-field model and the selected physical parameters were in line with the actual situation.

关 键 词：U75V轨道钢 相场模型 冷却速度 片状珠光体 片层间距 

分 类 号：TG11[金属学及工艺—物理冶金] TP3[金属学及工艺—金属学]