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一、概述 在国外,气体保护焊技术是于40年代末、50年代初开始的一种熔化焊接方法。一般来说,CO_2半自动焊与水工电弧焊相比可提高劳动生产率1—2.5倍,在相同条件下,可节能50—70％,一般CO_2焊机一年可节能6000—8000余度,而且焊后变形小,是一种高效、节能比较理想的焊接方法。60年代才在工业上较广泛的应用。近十多年来,实芯焊接的生产在工业发达国家内均已专业化、标准化和系列化。目前这种焊接方法已广泛应用于汽车制造、农业机械、压力容器、船舶制造等各个工业部门。尽管CO_2气体保护焊接已被认
First, an overview In foreign countries, gas shielded welding technology in the late 40s, early 50s a melt welding method. In general, CO_2 semi-automatic welding and hydraulic arc welding can improve labor productivity 1-2.5 times, under the same conditions, can save 50-70%, the general CO_2 welder energy-saving 6000-8000 a year, and Small deformation after welding, is a highly efficient, energy-saving ideal welding method. 60’s in the industry more widely used. In the past ten years, the production of solid core welding has been specialized, standardized and serialized in industrialized countries. The current welding method has been widely used in automobile manufacturing, agricultural machinery, pressure vessels, shipbuilding and other industrial sectors. Although CO 2 gas shielded welding has been recognized