摘要
该文以可靠性理论为基础 ,研究制定了电厂锅炉蛇形管焊接接头的加速寿命试验的方法和规范。通过对大量新制的 15CrMo摩擦焊接头具有加速寿命意义的高温内压爆破持久试验 ,和对其试验结果的分析、处理 ,证明了试验规范的正确性和各组合应力水平的失效机理的一致性。在此规范的基础上 ,对已运行过 13.2× 10 4h的 12Cr1MoV摩擦焊接头 ,建立了带有可靠度指标的残余寿命数学模型。借助此模型 ,对新旧两种摩擦焊接头进行了寿命预测计算。结果表明摩擦焊接头 ,在设计寿命期内是完全可靠的 ,摩擦焊这种焊接工艺的质量是稳定可靠的 ,文中所述的试验方法和寿命预测模型对高温承压部件的残余寿命的预测 ,和确定那些超期服役管道和接头的更换时间方面具有指导意义。
Based on reliability theory in this paper,the method and specification of accelerated life test for friction welded joints in boiler snake pipe were worked out.The correctness of the specification and the concordance of the failure mechanism of the friction welded joints on the different combined stress levels were verified by high temperature internal pressure burst duration test with accelerated life senses for a large number new fiction welded joints of 15CrMo steel and by analyzing the test results.The mathematical model, which was used to calculate residual life with reliability for the friction welded joints of 12Cr1MoV steel having worked 132000 hours,was set up.With the help of the model, the residual life of the new and old friction welded joints was calculated.Through calculation of the test data,the following conclusions were drawn: the friction welded joints is very reliable during the design life;the quality of the friction welding procedure is stable;the test method and mathematical model are of the practical value to forecast the residual life for high temperature pressure containing and to determine the refresh time for extended service pipe life and welded joints.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2002年第3期48-52,共5页
Proceedings of the CSEE
基金
原机械工业部技术发展基金资助项目 (90J5 0 80 1)
