【摘要】 对国产和进口5183、5356铝合金焊丝进行较全面的对比分析，采用MIG焊对5083O铝合金板材进行焊接试验。利用金相显微镜、扫描电镜和拉伸试验机等研究了焊丝及焊接接头的组织与性能。结果表明：与进口焊丝相比，国产5183和5356铝合金焊丝晶粒较圆润，晶粒略大；进口5183、5356铝合金焊丝强度高于国产焊丝。采用国产和进口5183铝合金焊丝进行焊接试验后，接头抗拉强度分别为288 MPa和279 MPa;用国产和进口5356铝合金焊丝焊接后，接头抗拉强度分别为287 MPa和286 MPa。更多还原

【Abstract】 A comprehensive comparison and analysis was conducted on domestic and imported 5183 and 5356 aluminum alloy welding wires. Filament feeding MIG welding was used to conduct welding tests on 5083-O aluminum alloy plates. The microstructures and properties of the welding wires and the welding joints were studied using metallographic, scanning, and tensile testing methods. The results show that compared with the imported welding wires, domestic 5183 and 5356 aluminum alloy welding wires have rounder grains and slightly larger grain sizes. The strength of the imported 5183 and 5356 aluminum alloy welding wires was higher than that of domestic ones. After conducting welding tests using domestic and imported welding wires, the tensile strengths of the joints were 288 MPa and 279 MPa respectively. The tensile strengths of the domestic and imported 5356 aluminum alloy welding joints were 287 MPa and 286 MPa respectively.更多还原