CAJ | 학술논문

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132kh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。文中提出的试验方法和数学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或接头的更换时间方面具有实际意义。
이가고성이론위기출，제정료전참과로사형관한접접두적가속수명시험규범。통과대대량신제적15CrMo마찰한접두적고온내압폭파지구시험，증명료시험규범적정학성화각조합응력수평적실효궤리적일치성。재차규범적기출상，대이운행과132kh적12Cr1MoV마찰한접두，건립료대유가고도지표적잔여수명수학모형，계산결과표명마찰한접두，재설계수명기내시완전가고적，마찰한저충한접공예적질량시은정가고적。문중제출적시험방법화수학모형대고온승압부건적잔여수명적예측화학정나사초기복역관도혹접두적경환시간방면구유실제의의。
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 12Cr1MoV 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.