摘要
采用等离子-MIG复合焊工艺对16 mm厚6005铝合金进行双面焊接,研究焊接接头的显微组织和力学性能。结果表明,焊缝区为等轴树枝晶,熔合线附近为柱状晶组织,热影响区相比母材组织粗化;接头各区显微硬度值均低于母材;接头的侧弯试验可达180°;抗拉强度201 MPa,为母材强度的77.31%,断裂位置在热影响区内。
Plasma-MIG hybrid welding of 6005 aluminum alloy with 16mm thickness and double V-groove was carried ont. The microstructure and mechanical properties of the welded joint were investigated. The results showed that the microstructure was characterized by equiaxed dendritic crystal and columnar crystal in the weld seam zone and at the weld side of fusion zone respectively. And the microstructure in HAZ was coarser than that in base metal. The microhardness in the weld was lower than that in the base metal. The side bend test of the welded joint could reach 180°. The tensile strength of the welded joint was 201 MPa which was 77.31% that of the base metal. The fracture was located in the HAZ.
出处
《电焊机》
2016年第8期92-95,共4页
Electric Welding Machine
基金
江苏科技大学生先进焊接技术省级重点实验室开放研究基金资助项目(JSAWT-11-02)
