不同淬火油对18Cr2Ni2MoVNbA钢渗碳淬火组织和变形影响规律的数值模拟  

Numerical simulation of influence of different quenching oil on microstructure and deformation of 18Cr2Ni2MoVNbA steel after carburizing quenching

作　　者：樊朋煜 翟鹏远 刘克 李国栋 吴玉广 李峰诚 邹伟 Fan Pengyu;Zhai Pengyuan;Liu Ke;Li Guodong;Wu Yuguang;Li Fengcheng;Zou Wei(China North Advanced Technology Gener Lization Institute,Beijing 100089,China;Jianglu Machinery&Electronics Group Co.,Ltd.,Xiangtan Hunan 411100,China;School of Mechanical Engineering,North University of China,Taiyuan Shanxi 030051,China)

机构地区：[1]中国兵器工业新技术推广研究所,北京100089 [2]江麓机电集团有限公司,湖南湘潭411100 [3]中北大学机械工程学院,山西太原030051

出　　处：《金属热处理》2024年第4期229-236,共8页Heat Treatment of Metals

基　　金：新材料基础应用研究课题。

摘　　要：通过冷却特性曲线经反传热计算出LBA 15C和MT355淬火油的换热系数,利用有限元计算了采用这两种淬火油淬火时18Cr2Ni2MoVNbA钢C形缺口试样冷却过程中不同位置的组织、温差及变形变化规律,并通过组织分析、变形测量和硬度检测对模拟结果进行了试验验证。结果表明,采用这两种淬火油时,18Cr2Ni2MoVNbA钢渗碳淬火后的组织均以马氏体为主,且由于LBA 15C淬火油的冷却速度快于MT355淬火油,经LBA 15C淬火油淬火后的马氏体含量略高。淬火后C形试样缺口均表现出收缩变形,且采用LBA 15C淬火油的淬火过程热应力更大,变形更大。综合考虑组织、应力和变形,宜选择MT355淬火油进行淬火。Heat transfer coefficients of quenching oil LBA 15C and MT355 was calculated by reverse heat transfer through cooling characteristic curve.The variation of microstructure,temperature difference and deformation at different positions of 18Cr2Ni2MoVNbA steel C-type specimens during quenching with two kinds of quenching oils were calculated by finite element method,and the simulation results were verified by microstructure analysis,deformation and hardness measurement after quenching test.The results show that when using the two kinds of quenching oils,the microstructure of the carburized 18Cr2Ni2MoVNbA steel after quenching is mainly martensite,and the martensite content after quenching with quenching oil LBA 15C is slightly higher than that with quenching oil MT355,which is due to the faster coling rate of quenching oil LBA 15C.After quenching,the notch of C-type specimens is shrinkage deformation,and the thermal stress and deformation of the specimens quenched with quenching oil LBA 15C are larger than that with quenching oil MT355.Considering the microstructure,stress and deformation,MT355 quenching oil should be selected for quenching.

关 键 词：18Cr2Ni2MoVNbA钢 C形试样 淬火介质 显微组织 

分 类 号：TG142.1[一般工业技术—材料科学与工程]