WANG Feng,LI Liang,XU Gang,et al.Analysis on weld defects and tensile properties of dissimilar steel with backing plate[J].Thermal Power Generation,2023,52(01):170-176.[doi:10.19666/j.rlfd.202205101]
带垫板异种钢焊缝缺陷与拉伸性能分析
- Title:
- Analysis on weld defects and tensile properties of dissimilar steel with backing plate
- 摘要:
- 异种钢焊接是电厂锅炉受热面管广泛采用的一种连接方式。以某火电机组过热器出口段TP304H和T22为母材的带垫板异种钢焊接接头为研究对象，通过宏观测量、微观组织分析、EDS能谱检测和拉伸试验等研究，分析了焊接接头中裂纹的生成机理及影响。结果表明：3种材料热膨胀系数差异及应力集中是带垫板异种钢焊缝裂纹产生的诱因，裂纹在镍基焊缝填充材料中扩展；室温拉伸时焊缝是薄弱环节，而高温拉伸时熔合线和母材是断裂部位。
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（责任编辑 邓玲惠）
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备注/Memo
汪峰（1970），男，助理工程师，主要研究方向为火电锅炉检修和金属监督，13862919100@163.com。
