2.25Cr1Mo钢大型锻件热处理工艺数值模拟  

Numerical simulation on heat treatment process of 2.25Cr1Mo steel large forgings

作　　者：龚雪婷 武志广[1] 李鑫[1] 贾红帅 Gong Xueting;Wu Zhiguang;Li Xin;Jia Hongshuai(China Institute of Atomic Energy, Beijing 102413,China;School of Materials Science and Engineering,University of Science and Technology,Anshan Liaoning 110451,China)

机构地区：[1]中国原子能科学研究院,北京102413 [2]辽宁科技大学材料科学与工程学院,辽宁鞍山114051

出　　处：《金属热处理》2019年第3期192-197,共6页Heat Treatment of Metals

基　　金：国家重点研发计划(2016YFB0300203)

摘　　要：利用有限元模拟计算,结合CCT曲线,研究了2. 25Cr1Mo大型锻件不同热处理工艺下的组织演变规律。以大型2. 25Cr1Mo管板锻件为背景,模拟现场工况,对热处理工艺进行数值模拟。讨论不同热处理工艺下的换热系数,利用有限元模拟软件与实测的CCT曲线,建立了2. 25Cr1Mo锻件在热处理工艺下的温度场、组织场,探究了2. 25Cr1Mo锻件在水冷,油冷以及空冷3种冷却工艺下温度场和组织场的变化,并利用质点追踪的方法对比了大锻件不同部位的温度变化。结果显示在水冷工艺条件下,最终的组织主要以贝氏体为主,能满足工艺的需要,为最优的热处理工艺。Microstructure evolution of 2.25Cr1Mo large forgings under different heat treatment processes was studied by using finite element simulations and combined with CCT curves. With large 2.25Cr1Mo tube sheet forgings as background,the on-site working conditions were simulated and the heat treatment process was numerically simulated. The heat transfer coefficient under different heat treatment processes was discussed. Using the finite element simulation software and the measured CCT curve,the temperature field and the microstructure field of the 2.25Cr1Mo forgings under the heat treatment process were established. The 2.25Cr1Mo forgings under the different cooling conditions of water,oil and air cooling were investigated,the temperature changes in different parts of the large forgings were compared by using the particle tracking method. The results show that under the condition of water cooling as the optimal heat treatment process,the final microstructure is mainly bainite,which can satisfy the requirement of process.

关 键 词：大锻件 2. 25Cr1Mo钢 热处理工艺 有限元数值模拟 

分 类 号：TG430.10[金属学及工艺—焊接]