1Cr5Mo pipeline welded joints with E309-15(A307)/E309-16(A302)austenitic stainless steel are prone to carbon migration,thermal stress and microstructure instability after service,which often lead to early failure.This kind of welded joint in service was tested by normal temperature tensile,high temperature tensile,impact,hardness distribution measurement and high temperature creep test,and the weld seam and the microstructure of the nearby base material were analyzed by metallographic photos to judge the performance of the welded joint.Larson-Miller parameter method was used to predict the remaining life of the equipment by using the high temperature creep test data.At the same time,the relationship between carbon migration degree and time was obtained by aging treatment method,which provided theoretical support for identifying early failure of high-temperature pipeline welded joints with austenitic stainless steel welding materials and ensuring safe production.
关键词
焊接接头/性能试验/蠕变寿命预测/碳迁移
Key words
welded joints/performance test/creep life prediction/carbon migration
维普
万方数据