退火态5083铝合金焊接接头组织与性能分析

采用连续挤压—拉拔—刮削光亮化技术制备的ER5356铝合金焊丝对退火态5083铝合金板材进行MIG焊接,并通过金相、扫描、硬度、拉伸等观察与测试手段对其焊接接头进行试验分析。结果表明:该技术制备的焊丝焊接效果良好,焊缝无裂纹、夹杂等缺陷;焊接接头各区域组织分布均匀,焊缝中心硬度最低,为68 HV,焊接接头抗拉强度为277 MPa,强度系数为92.3%,力学性能较好,完全达到了实际焊接要求和船舶使用需求。

An Analysis of Micro-Structure and Properties of Welded Joints of

ER5356 aluminum alloy welding wire, prepared by adopting continuous extrusion drawing, scraping, and brightening technology, is to be used for MIG welding of annealed 5083 aluminum alloy, followed by a series of tests and analyses of the welding joints by means of metallographic examination, scanning, hardness and tensile tests. The experimental results show that the welding effects of the wires thus prepared are satisfactory, without such defects as cracks, inclusions, etc. The micro-structure of the welded joints is well distributed, with 68 HV the minimum hardness of welding seam center, with 277 MPa the tensile strength of welded joints , and 92.3% its strength coefficient, thus exhibiting such an excellent mechanical performance that it fully meets the actual welding requirement and ship usage requirement.