气体保护焊是成本较低的焊接方法之一,近20多年来在国外得到广泛应用。在我国,气体保护焊的应用正逐步普及,气体保护焊在焊接中的比例也逐渐增加。但由于焊接材料尚存在品种少、规格不全、标准不适应当前需要等问题,气体保护焊在国内尚没有得到应有发展。为了适应生产需要并推动气体保护焊的普及,根据(91)冶质字第234号文件的要求,由天津市焊丝厂和冶金部钢铁研 Gas shielded welding is one of the lower cost welding methods, which has been widely applied abroad for nearly 20 years. In China, the application of gas shielded welding is gradually gaining popularity, and the proportion of gas shielded arc welding in welding is also gradually increasing. However, due to welding materials there are still less varieties, specifications incomplete, the standard does not meet the current needs and other issues, gas shielded welding in the country has not been properly developed. In order to meet the production needs and promote the popularity of gas shielded welding, according to (91) yeli word 234th document from the wire factory in Tianjin and the Ministry of Metallurgical Iron and Steel Research