12Cr1MoV钢高温时效过程中组织结构的演变  

Evolution of Microstructures of 12Cr1MoV Steel During High Temperature Aging

作　　者：杨瑞成[1] 王晖[1] 郑丽平[1] 姚继辉 李贵智[1] 移建永[1] 

机构地区：[1]甘肃工业大学材料学院,甘肃兰州730050

出　　处：《金属热处理》2002年第9期18-22,共5页Heat Treatment of Metals

基　　金：甘肃省自然科学基金项目 (ZS0 0 1 A2 2 0 4 6 C)

摘　　要：用Larson Miller参数对 12Cr1MoV钢进行了在不同温度与时间的高温时效模拟 ,研究了其显微组织和亚结构的演变。光学显微镜、扫描电镜及透射电镜的观察分析表明 ,在时效过程中的主要组织结构变化是珠光体的消散与分解 ,碳化物从固溶体中脱溶 ,碳化物粗化并向晶界转移以及晶粒长大。同时 ,位错密度下降并结成位错网络。By means of Larson-Miller parameter for different temperature and time,the simulation of high temperature aging of 12Cr1MoV steel was performed to study the evolution of its microstructures and substructures.Results of OM,SEM and TEM showed that the main microstructure variations during aging are the dissipate of pearlite,the precipitate of carbide from solid solution,carbide coarsening and transition from intracrystalline to grain boundaries,and grain growth.Meanwhile,dislocation reduced in density and joined into network.These variations are in correspondence with the thermodynamic driving forces and diffusion kinetics.

关 键 词：12CR1MOV钢 耐热钢 晶粒长大 时效 粒子粗化 组织结构 扩散 

分 类 号：TG161[金属学及工艺—热处理] TG142.73[金属学及工艺—金属学]