FLUX PLASMA ARC WELDING

Chai Guoming  Zhu Yifeng  Zhang Hui

(National Key Laboratory for High Energy Density Beam Processing Technology, Beijing Aeronautical Manufacturing

Technology Research Institute,  Beijing 100024)

Abstract: In activated flux PAW welding, the welding arc temperature field is measured by the infrared sensing and computer image technique. The distribution models of welding arc heat flow density of activated flux PAW welding are developed. The phenomenon of welding arc effecting by activated flux is studied, and the relationships between the welding arc voltage and activated flux is studied. The results show that the welding arc temperature distribution in activated flux PAW welding 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 activated flux PAW welding arc is contractive, the arc tail is disappear, the efflux plasma is increasing, the force of penetration is strengthening, the arc voltage is larger.

Key word: Activated flux PAW welding  Welding arc  Temperature field

CLC No: TG456

武器装备重点基金资助项目(614010). Received 20041102, received in revised form 20050330