摘要
提出采用接管内表面堆焊来改善焊接接头残余应力分布的方法。利用有限元软件ABAQUS模拟堆焊过程,得到了接管部位堆焊前后残余应力分布规律,并讨论了堆焊工艺参数对残余应力的影响。结果表明,接管内表面堆焊能降低接头部位的残余应力,径向和环向残余应力均得到明显降低。环向应力最大值由堆焊之前的260.3 MPa降低到了84.5 MPa;焊缝表面径向应力平均降低了194.0%,环向应力平均降低了83.6%。降低堆焊热输入、增大堆焊长度有利于降低焊接残余应力。
presents a method of improving welding residual stress distribution by cladding on the inner surface of pipe, which is simulated by finite element analysis. Then, the weld residual stresses of weld joints before and after cladding are obtained, and the effects of cladding parameters on residual stress distribution was discussed. The results show that cladding on the inner surface of pipe can reduce the residual stress of weld joint, and the circumferential stress was greatly reduced. The maximum value of circumferential stress was reduced from 260.3 MPa to 84.5 MPa, the radial stress and circumferential stress of weld surface was reduced by an average of 194% and 83.6%, respectively. The welding residual stress reduces with the increasing cladding length and the decreasing heat Input.
出处
《热加工工艺》
CSCD
北大核心
2014年第23期178-181,共4页
Hot Working Technology
基金
国家自然科学基金资助项目(51105380
11372359
51105383)
中国石油大学(华东)研究生创新工程项目(YCX2014034)
关键词
焊接残余应力
堆焊
有限元
welding residual stress
cladding
finite element analysis
