The application of Ar-CO2 mixedgas in the welding of low-carbon steel could improve welding process, increase welding quality and decrease welding cost.
CO2混合气应用在低碳钢焊接上，可以改进焊接工艺，提高焊接质量，降低焊接成本。
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This paper illustrates the applications of mixed gases in GMAW and analyzes the different proportion of shielding gas impacts on the welding technics performance and quality in GMAW.
Taking the He-Ar mixedgas as protected atmosphere, TIG welding process parameters for AZ31 magnesium alloy plates was optimized by using the method of the orthogonal experiment and variance analysis.