本文针对9260钢(美国钢号)与厚度差较大的20~#钢异种材质的焊接产品,提出了在严格保证焊接接头质量的条件下,采用全自动的混合气体保护焊方法。通过工艺试验和焊接接头质量检验,说明焊接该产品采用富氩混合气体保护焊,焊前不需预热,利用分因数模式试验方法恰当地选择焊接工艺规范参数,即可保证产品对焊缝质量的严格要求。 Aiming at the welding products of 9260 steel (American steel) and 20 ~ # steel with different thicknesses, this paper proposes a fully automatic hybrid gas shielded welding method under the condition of strictly ensuring the quality of welded joints. Through the process test and the quality inspection of welded joints, indicating the welding of the product using argon-rich mixed gas shielded welding, without preheating before welding, the use of fractional mode test method to properly select the welding process parameters to ensure that the product quality of the weld The strict requirements.