采用E309焊材的长期服役1Cr5Mo管线焊接接头性能与寿命预测研究  

Study on Performance and Life Prediction of Long-serving 1Cr5Mo Pipeline Welded Joint with E309 Welding Material

作　　者：卢艳玲 梁斌 王应植 马晶晶 姜勇[5] 邵世飞 徐娟娟 姚扬 Lu Yanling;Liang Bin;Wang Yingzhi;Ma Jingjing;Jiang Yong;Shao Shifei;Xu Juanjuan;Yao Yang(The Department of Physical and Chemical,Nanjing Jinchuang Nonferrous Metal Technology Development Limited Company,Nanjing,Jiangsu 211161,China;Nanjing Boiler&Pressure Vessel Supervision and Inspection Institute,Nanjing,Jiangsu 210019,China;Chang Zhou University.School of Mechanical Engineering and Rail Transity,Changzhou,Jiangsu 213164,China;SINOPEC Jin ling Company,Nanjing,Jiangsu 210000,China;Nanjing Tech University School of Mechanical and Power Engineering,Nanjing,Jiangsu 210000,China)

机构地区：[1]南京金创有色金属科技发展有限公司,江苏南京211161 [2]南京市锅炉压力容器检验研究院,江苏南京210019 [3]常州大学机械与轨道交通学院,江苏常州213164 [4]中国石油化工股份有限公司金陵分公司,江苏南京210000 [5]南京工业大学械工程学院,江苏南京210000

出　　处：《化工设备与管道》2024年第5期89-95,共7页Process Equipment & Piping

基　　金：中石化金陵分公司技术开发项目(31700000-21-ZC0607-0006《服役20年以上压力容器安全性与剩余寿命研究》);南京市市场监督管理局重点科技项目(Kj2022037)。

摘　　要：采用E309-15(A307)/E309-16(A302)奥氏体不锈钢焊材焊接的1Cr5Mo管线焊接接头在服役后易发生碳迁移、热应力以及微观结构不稳定等问题从而导致经常出现早期失效。通过对服役的该类焊接接头进行常温拉伸、高温拉伸、冲击、硬度分布测量,高温蠕变试验,并通过金相照片对焊缝及附近母材微观组织进行分析判断焊接接头性能,采用Larson-Miller参数方法利用高温蠕变试验数据对设备剩余寿命进行预测;同时利用时效处理方法获得碳迁移程度与时间的关系,为判别采用奥氏体不锈钢焊材的长期服役高温管线焊接接头早期失效、保障安全生产提供理论支撑。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 

分 类 号：TG407[金属学及工艺—焊接]