基于SYSWELD的T91级管线钢管环焊缝接头残余应力数值模拟  

Numerical Simulation of Residual Stress in Ring Welding Joint of T91 Pipeline Steel Pipe Based on SYSWELD

作　　者：缪泽宇 孔凡玉[1] 刘辉[1] 

机构地区：[1]中国计量学院质量与安全工程学院浙江省家具检测技术研究重点实验室,浙江杭州310018

出　　处：《热加工工艺》2016年第17期156-160,共5页Hot Working Technology

基　　金：国家自然科学基金项目(NO.51104134);浙江省自然科学基金项目(NO.LY14E040001)

摘　　要：以T91钢管为研究对象，基于试验结果对其环焊热源模型做校准处理，使用SYSWELD数值模拟软件对整个焊接过程进行了模拟计算，分析了焊接接头在焊接过程中的温度、应力等变化，对焊后的残余应力进行了预测。结果表明：最大残余应力位于距焊缝中心5～10mm的部位，即热影响区外侧，而最小残余应力位于母材区。在多层焊接过程中，随着焊接层数的递增，残余应力峰值部位转移至外侧的热影响区。Taking T91 steel pipe as the research object,, the heat source model of the ring welding was calibrated based on the test results.The whole welding process was simulated by using SYSWELD software. The changes of temperature and stress during the welding process were analyzed, and the residual stress after welding were predicted.The results show that the maximum residual stress is located at the position of 5-10 mm from the weld center, which is outer side of the heat affected zone, and the minimum residual stress is located in the area of base metal. In the multi-layer welding process, with the increase of welding layer, and the peak value of residual stress shifts to the outer heat affected zone.

关 键 词：T91级管线钢管 环焊接头 数值模拟 

分 类 号：TG404[金属学及工艺—焊接]