12Cr1MoVg短期高温冲击断裂有限元分析  

SHORT-TERM HIGH-TEMPERATURE THERMAL SHOCK FRACTURE OF 12 CrlMoVg STEEL AND FINITE ELEMENT ANALYSIS THEREOF

作　　者：陈乃超[1] 郑博[1] 田冠玉[1] 

机构地区：[1]上海电力学院能源与环境工程学院,上海200090

出　　处：《热力发电》2009年第2期41-44,共4页Thermal Power Generation

基　　金：上海市优秀青年教师基金(B01673);上海市教委重点学科建设项目基金(P1302)

摘　　要：采用有限元数值计算方法对实际运行中的短期高温冲击对12Cr1MoVg断裂韧性的影响进行分析。通过对实际温度冲击工况的获取,建立数值计算模型,实施综合负载,得到断裂应力强度因子和修正系数。同时,通过三点弯曲(试验COD法)验证,结果显示有限元分析所得到的结果比常温下试验所得到的结果更准确。By using finite element numerical calculation method, the influence of short - term high - temperature shock upon fracture toughness of 12 CrlMoVg steel has been analysed. Througb obtaining real temperature shock behavior,the numerical calculation mod- el has been established. Applying comprehensive load, the rupturing stress strength factor and modifying coefficient have been ob- tained. At the same time, through verification by using COD test method,it shows that the result obtained from finite element analysis is more accurate than that obtained from test under normal atmospheric temperature.

关 键 词：12CR1MOVG 高温冲击 有限元 断裂韧性 修正系数 

分 类 号：TG115.56[金属学及工艺—物理冶金]