摘要
采用耗材摩擦焊实现2A12铝合金在Q235低碳钢上的多层多道焊接。结果表明:耗材摩擦焊可以获得表面成形良好、无内部缺陷的多层多道焊接接头。在焊接热循环作用下,堆焊层组织中第二相颗粒发生了聚集长大且先堆焊层第二相颗粒聚集长大现象更明显;接头后堆焊层硬度高于先堆焊层硬度;接头剪切强度可达130.3 MPa,为2A12铝合金剪切强度的63%,接头断裂于堆焊层铝合金侧,断裂方式为韧性断裂。
Multi-pass welding of2A12aluminum and Q235low carbon steel was realized by friction surfacing.The result showed that multi layer and multi-channel welded joints with good surface forming and no internal defects can be obtained by friction welding.Under the thermal cycle of welding,the second phase particles gathered and grew up,and the aggregation and growth of the second phase particles of the first surfacing layer is more obvious.The hardness of the welding layer is higher than that of the first welding layer.The joint shear strength is up to130.3MPa which is63%of the2A12aluminum alloy.The joint is broken on the aluminum alloy side,and the fracture mode is ductile fracture.
作者
王春桂
赵运强
董春林
李继忠
WANG Chungui;ZHAO Yunqiang;DONG Chunlin;LI Jizhong(E.O.Paton Chinese-Ukrainian Institute of Welding,Guangzhou 510651,China)
出处
《电焊机》
2017年第12期13-16,共4页
Electric Welding Machine
基金
广东省省级科技计划项目(2015B090922011)
广东省现代焊接技术重点实验室项目(2012A061400011)
关键词
材摩擦焊
多层多道焊
热循环
第二相颗粒
friction surfacing
multi-pass welding
thermal cycling
second phase particle
