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日本《溶接学会志》1986年№1一则报道指出,近几年来管状焊丝在结构焊接中得到了广泛的采用,其需量还在迅速增加。为使管状焊丝的焊接高效率化,需要从焊丝的特性方面来提高熔化速度和熔敷效率,设想从增加电流密度和利用焊丝预热效果等方面提高焊丝的熔化速度和减少飞溅量等提高熔敷效率。在这些重要因素中,需调查焊丝直径和焊接电流值对电流密度的影响和焊丝的外伸长度(焊嘴与母材之间的距离)对预热效果的影
Japan, “Institute of Welding” 1986 № 1 a report pointed out that in recent years, tubular welding wire in the structure has been widely used in welding, the demand is still rapidly increasing. In order to increase the efficiency of the welding of the tubular welding wire, it is necessary to improve the melting speed and the deposition efficiency in terms of the characteristics of the welding wire. It is envisaged to increase the melting rate of the welding wire and increase the melting rate of the welding wire by increasing the current density and utilizing the preheating effect of the welding wire Apply efficiency. Among these important factors, the influence of the wire diameter and the welding current value on the current density and the extension of the welding wire (the distance between the welding tip and the base metal) on the preheating effect