According to the characteristics of arc welding with filler wire, experiments about the FCAW-CO_2 and SAW which is commonly used in steel bridge welding were carried out.
根据熔化极焊丝填充焊的特性，对钢桥焊接中普遍应用的药芯焊丝CO_2气体保护焊和埋弧自动焊进行了焊接试验。
7a52 aluminum alloy was welded by using 5a56 filler with twin wire gas shielded arc welding.
采用5a56焊丝对7a52铝合金进行双丝气体保护焊，对焊接接头的力学性能和显微组织进行了研究。
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