中碳Cr-Ni-Mo-V耐热高强钢大锻件淬火过程有限元分析  

Finite element analysis of quenching process of large forging of Cr-Ni-Mo-V medium carbon heat-resistant high-strength steel

作　　者：杨宏韬 刘科虹 贾奇辉 吴润生 赵梓恒 李玮 Yang Hongtao;Liu Kehong;Jia Qihui;Wu Runsheng;Zhao Ziheng;Li Wei(School of Materials and Metallurgy,Inner Mongolia University of Science and Technology,Baotou Inner Mongolia 014010,China;Inner Mongolia North Heavy Industries Group,Baotou Inner Mongolia 014010,China;Instrumental Analysis Centre,Inner Mongolia University of Science and Technology,Baotou Inner Mongolia 014010,China;Collaborative Innovation Center of Integrated Exploitation of Bayan Obo Multi-Metal Resources,Inner Mongolia University of Science and Technology,Baotou Inner Mongolia 014010,China)

机构地区：[1]内蒙古科技大学材料与冶金学院,内蒙古包头014010 [2]内蒙古北方重工业集团有限公司,内蒙古包头014010 [3]内蒙古科技大学分析测试中心,内蒙古包头014010 [4]内蒙古科技大学白云鄂博共伴生矿资源高效综合利用省部共建协同创新中心,内蒙古包头014010

出　　处：《金属热处理》2023年第5期138-144,共7页Heat Treatment of Metals

基　　金：内蒙古自治区科技计划(2021GG0141);军民融合产业发展转移支付专项基金产业示范引导项目(JMRHZX20210009)。

摘　　要：针对大型锻件存在组织不均导致淬火开裂的现象,采用DEFORM有限元软件对中碳Cr-Ni-Mo-V耐热高强钢大型锻件940℃淬火过程的温度场、应力场及组织场进行了数值模拟。结果表明,该中碳Cr-Ni-Mo-V耐热高强钢淬火过程中的锻件心部与表面温差超过600℃,内应力主要集中在台阶位置。根据模拟结果,实际锻件采用“水淬14 min+空冷10 min+水淬”的淬火工艺,可以在保证组织与常规水淬相似的前提下,极大地降低台阶位置的内应力,避免锻件淬火开裂。To avoid the phenomenon of quenching cracking due to uneven microstructure of large forging,the temperature,stress and microstructure fields of large forging made of medium carbon Cr-Ni-Mo-V heat-resistant high-strength steel during quenching at 940℃were numerically simulated using DEFORM finite element software.The results show that the temperature difference between core and surface of the Cr-Ni-Mo-V steel large forging exceeds 600℃during quenching process,and the internal stress is mainly concentrated at the step position.According to the simulation results,the adopting of the quenching process of“water quenching for 14 min+air cooling for 10 min+water quenching”can greatly reduce the internal stress in the step position and avoid quenching cracking of the forging while ensuring the microstructure is similar to that of conventional water cooling.

关 键 词：中碳Cr-Ni-Mo-V耐热高强钢 淬火 温度场 应力场 组织场 

分 类 号：TG156.3[金属学及工艺—热处理]