The application of Ar-CO2 mixed gas 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。
2
The decarburization speeds up, as the ar blow rate increases, and the influence of argon flow rate on decarburization is greater in the low carbon zone.
随底吹氩气流量的增加，脱碳速度加大，此种作用在低碳区影响尤为明显。
3
Carbon foams were prepared from coal tar pitch, petroleum mesophase pitch, and ar pitch.