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本文研究了影响焊条熔化系数特别反接时的熔化系数的电弧物理因素,主要有三方面。 1、有效阳极压降U_A是影响作为阳极的焊条的熔化系数的重要因素之一,通过增加有效阳极压降U_A而增加阳极斑点的析出热功率,从而可使作为阳极的焊条的熔化系数提高百分之二十左右。 2、从导热角度出发,熔滴尺寸的大小是影响熔化系数的一个因素。而通过减小熔滴尺寸,缩短导热途径,亦可提高熔化系数。 3、电弧柱热利用率是提高熔化系数的一个重要因素,尤其是提高反按熔化系数的重要的因素。其主要是利用弧柱热来熔化药皮、从而节约了极性斑点热,用于加速钢芯的熔化,使熔化系数提高。根据研究,若充分利用弧柱热则可提高熔化系数百分之二十以上。 根据上述基本理论的研究,提出了提高熔化系数尤其反接熔化系数的重要途径。
In this paper, we study the physical factors of arc that affect the melting coefficient of the electrode when the melting coefficient is reversed. There are mainly three aspects. 1, the effective anode voltage drop U_A is one of the important factors that affect the melting coefficient of the electrode as the anode. By increasing the effective anode voltage drop U_A, the precipitation heat power of the anode spot increases, so that the melting coefficient of the electrode as the anode can be increased by 100% Twenty or so. 2, from the thermal point of view, the size of the droplet size is a factor affecting the melting coefficient. By reducing the droplet size and shortening the thermal pathways, the melting coefficient can also be increased. 3, the thermal utilization of the arc column is an important factor to improve the melting coefficient, in particular, to improve anti-melting coefficient of the important factors. The utility model mainly uses the arc column heat to melt the medicinal hide, thereby saving the polar speckle heat and accelerating the melting of the steel core so as to improve the melting coefficient. According to the study, if full use of arc-column heat can increase the melting coefficient of more than twenty percent. According to the above basic theory, an important way to improve the melting coefficient, especially the reverse melting coefficient, is proposed.