电焊机2018，Vol.48Issue(1)：70-74,5.DOI:10.7512/j.issn.1001-2303.2018.01.16
套管结构异种金属多层多道焊接数值模拟
Numerical simulation of multi-layer multi-pass welding for dissimilar metals in casing pipe structure
周崎 1彭小钢 1李浩 1李小敏 1李成明1
作者信息
- 1. 广东检验检疫技术中心,广东广州510665
- 折叠
摘要
Abstract
Special welding simulation soft SYSWELD is applied to simulate temperature field and stress field of multi-layer multipass welding for dissimilar metals in casing pipe structure,and the metallographic section observation and X-ray diffraction stress test are used to check the simulation model.The results show that the weld section obtained by simulative welding temperature field of checked model is consistent with the actual weld section,the temperature of the root joint fluctuates 14 times over time,each fluctuation has two peaks;simulation results are basically same with residual stress measured by X-ray diffraction,the distributions of axial residual stress at different welding position demonstrate similar regulation,axial residual stress at welding position of 0 degree and 90 degree are much higher,and the maximum residual stress is close to 300 MPa;numerical valves and distribution of circumferential residual stress at different welding position are same,the maximum circumferential residual stress is close to 300 MPa at 15 mm away from the root of first weld;the maximum Von Mises stress appears in the heat affected zone of low alloy steel,and the maximum Von Mises stress at welding position of 90 degree is 377 MPa.关键词
套管结构/多层多道/残余应力/数值模拟Key words
casing structure/multi-pass/residual stress/numerical simulation分类
矿业与冶金引用本文复制引用
周崎,彭小钢,李浩,李小敏,李成明..套管结构异种金属多层多道焊接数值模拟[J].电焊机,2018,48(1):70-74,5.
