基于可靠度的5Cr-0．5Mo耐热钢蠕变损伤评估  

Creep Damage Evaluation based on the Confidence Level of 5Cr-0.5Mo Heat-resistant Steel

作　　者：邢丽[1] 赵杰[2] 刘治[1] 季伟勤 冯炜[2] 

机构地区：[1]上海石化压力容器检验检测中心站,上海200540 [2]大连理工大学 材料科学与工程学院,辽宁大连116024

出　　处：《金属热处理》2007年第z1期409-411,共3页Heat Treatment of Metals

摘　　要：Robinson法则是高温构件进行蠕变寿命预测和损伤评估的一种简单方法。本文在引入Z参数基础上对蠕变损伤评估的Robinson法则进行了研究,提出了利用Robinson法则进行损伤评估时应与可靠度相关这一思想。通过研究5Cr-0.5Mo钢的NRIM蠕变断裂数据表明,不同可靠度对基于z参数预测的寿命值影响相当大。在一定温度和应力下,可靠度越大,蠕变损伤积累值也就越大。Robinson's rule as a simple method is widely used to predict the creep life and damage for many elevated temperature components.This paper mainly investigates the Robinson's rule of creep damage evaluation based on the Z-parameter method and proposes that the accumulated damage estimated by the Robinson's rule is related to the confidence level.From the investigation of 5Cr-0.5Mo NRIM data,the results show that the predicted life by the Z-parameter method varies greatly from the confidence level.At a certain stress and temperature,the higher the confidence level,the more the damage accumulation.

关 键 词：蠕变损伤 Z参数 Robinson法则 可靠度 5Cr-0.5Mo钢 

分 类 号：TG15[金属学及工艺—热处理]