异种钢气体金属电弧焊工艺参数优化

Fasil Kebede Tesfaye
埃塞俄比亚

摘要

焊接是一种通过聚结连接相似和不同金属的方法。GMAW 是一种广泛用于制造的半机械化、全机械化或自
动化工艺。GMAW 有望进一步发展，以实现更好的电弧控制、焊道轮廓控制、沉积控制和更高的生产率。本研究的
目的是提高由符合 ASTM/UNS S32205 的双相不锈钢（DSS）和符合 ASTM A242 的腐蚀钢 CORTEN-A 制成的异种钢 -
金属接头的焊接工艺变量。这种异种金属接头可用于运输部门，尤其是铁路车辆的制造。采用气体保护焊（GMAW）
工艺，以 CO2 为保护气体，309L 级药芯焊丝为填充材料，研究了两个 2mm 厚板材之间的方形对接接头。L9 田口阵
列用于优化所得焊缝的拉伸强度，这是所需的质量特征。GMAW 工艺参数如电压、送丝速度和焊接速度在三个水平
上进行了优化。使用方差分析，研究了各因素的影响。发现存在理想的参数集，并且电压是最关键的因素。进行了
确认测试以验证结果，并附上了一张图和表格。

关键词

CORTEN 钢；异种焊接；双相不锈钢；GMAW 工艺；优化

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