摘要
建立插入板组件焊接模型,通过ABAQUS进行网格划分,采用生死单元技术对其进行多层多道焊模拟。分析了双椭球热源模型在中低温用碳锰硅钢板(SA738Gr.B)与耐低温锻件法兰(SA350 Gr.LF-2)异种钢焊接中的准确性;模拟结果计算的最大径向残余应力为698 MPa,焊缝区域冷却后的径向收缩,导致插入板组件除少部分出现压应力区之外,焊缝及其周围区域均为拉应力;对插入板组件出现问题比较多的三层焊接进行了模拟。结果表明,在第7层的焊接过程中残余应力比较均匀,没有发生残余应力突变。
The insert plate welding model was established, and the multi-pass welding simulation was carried by the birth-death elements and ABAQUS software. The accuracy of using the double ellipsoid heat source model for welding between SA738Gr.B and SA350Gr.LF-2 was analyzed. The maximum radial residual stress under the calculating was 698 MPa, and a small portion of the insert plate and penetration appears in pressure zone due to radial contraction of the welding area after cooling; The three-layer welding of insert plate and penetration was simulated because of more problems appearing on it. The results show that the residual stress is uniform in the process of the seven-layer welding, and the residual stress mutations is not occurred.
出处
《铸造技术》
CAS
2018年第2期404-408,共5页
Foundry Technology
基金
山东省技术创新项目(201641906006)
