摘要
以可靠性理论为基础 ,制定了电站锅炉蛇形管焊接接头的加速寿命试验规范。通过对大量新制的 15CrMo摩擦焊接头的高温内压爆破持久试验 ,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132kh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 ,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。
Based on reliability theory, the specification of accelerate life test for friction welded joints in boiler snake pipe was worked out. The correctness of the specification and the concordance of the failure mechanism on the different combined stress levels were verified by high-temperature internal pressure burst duration test for a large number new friction welded joints of 15CrMo steel. The mathematical model, which was used to calculate residual life with reliability for the friction welded joints of 12Crl MoV steel having worked 132 000 hours, was set up. Through calculation of the test data, the following conclusions were drawn: The friction welded joints is very reliable in the design life;the quality of the friction welding procedure is stable. The test method and mathematical model related in thepaper also have practical value to forecast the residual life for high-temperature pressure-containing and to determine the refresh time for extended service pipe and welded joint.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2001年第2期35-38,共4页
Transactions of The China Welding Institution
基金
原机械工业部技术发展基金资助项目!(90J5 0 80 1)
