不锈钢活性剂等离子弧焊焊接电弧

Welding arc in plasma arc welding with activated flux

针对活性剂等离子弧焊焊接过程,对焊接电弧外形的变化,焊接电弧电压与活性剂之间的关系进行了研究,采用红外热像伪着色法测定了活性剂等离子弧焊焊接电弧温度场,并建立了活性剂等离子弧焊焊接电弧热流密度径向分布模型。研究结果表明,活性剂等离子弧焊焊接电弧收缩,弧尾翼消失,尾焰加大,电弧穿透力增强,电弧电压升高;活性剂等离子弧焊焊接电弧的温度分布比较紧凑,温度场外形窄,温度分布范围较集中,电弧径向温度梯度较大;电弧径向温度分布呈现正态Gauss分布模式;使用活性剂后的焊接接头性能与未使用活性剂焊接接头相当。

The welding arc in PAW effected by activated flux was studied, and the relationship between the welding arc voltage and activated flux was also studied. In activated flux PAW, the welding arc temperature field was measured by the infrared sensing and computer image technique. The distribution models of heat flow density of welding arc in activated flux PAW were developed. The results show that the activated flux PAW arc is contractive; the arc tail is disappeared; the efflux plasma is increasing; the force of penetration is strengthened; the arc voltage is high; the welding arc temperature distribution in activated flux PAW is compact; the outline of the welding arc temperature field is narrow; the range of the welding arc temperature distribution is concentrated; the welding arc radial temperature gradient is large; the welding arc radial temperature gradient shows normal Gauss distribution. The result shows that there is little difference in mechanical properties between the welded joints with activated flux and that without activated flux.