焊芯

用强石墨化药皮配合纯Ni焊芯制成焊条，其熔敷金属与WC&Co硬质合金有良好的湿润性和液态互熔性；

The electrode is made of pure Ni and coating with lots of graphite , which filler metal has well wetting quality and liquid inter-dissolution with WC-Co cemented carbide .

对于药皮质量系数为45.6%、直径为4mm的双电极钛钙型碳钢焊条（双焊芯），在电流为200A的条件下，当焊芯间距为1.2～1.7mm时焊缝成形较好。

For the twin electrode with a coating weight coefficient of 45.6 per cent and a diameter of 4 mm , good weld appearance can be gained , when the welding current is 200 A and the span of two cores ranges from 1.2 mm to 1.7 mm .

研究表明，双电极焊条两焊芯熔化的一致性受焊条类型、焊接电流等因素的影响。

The melting consistency of two cores is influenced by electrode type , welding current etc.

双电极钛钙型碳钢焊条焊芯间距对焊接工艺及电弧形态的影响

Effect of span between two cores of lime-titania type carbon-steel electrode on welding technology and shape of arc

确定了适合于大型冷冲模镶块刃口堆焊的焊条的合金成分，并给出了其比较合理的焊芯和药皮化学成分；

The compositions of electrode bar and electrode coating for big cold die insert of cast iron were given out experimentally .

结果表明，双电极钛钙型碳钢焊条的焊芯间距是影响电弧电压的最重要因素。

The results show that the span between two cores of twin electrode is the important factor for affecting arc voltage .

一般随焊芯间距的减小及焊接电流的增大，电弧自调节作用增强。

In general , the self-regulation effect of arc increases with the reducing of two-core span and increasing of welding current .

因此，重点研究了双电极之间电阻及焊芯间距对双电极焊条电弧形态、电弧电压及对焊缝成形的影响。

This paper investigates the influence of resistance and span between two cores on arc shape , arc voltage and weld appearance .

应用环境负荷评估理论和方法，对焊条的焊芯及部分添加材料&大理石粉、云母片、长石粉和萤石粉进行了环境负荷评估。

This paper applies the theory and method of environmental load to assess the welding core , marble , mica , feldspar , and fluorite .

焊缝金属化学成分、力学性能达到同类型铬镍合金焊芯不锈钢焊条的要求。

Chemical constituent and dynamics properties of the weld seam metal have reached the requirements of the same kind of chromel welding core stainless steel electrode .

采用平板堆焊的方法及高速摄像系统，研究了双电极钛钙型碳钢焊条的焊芯间距对焊接工艺和电弧形态的影响。

The effect of span between two cores of lime-titania type carbon-steel electrode was investigated using the method of overlay welding on the plate work-piece and high speed camera system .

电弧自调节作用原理是由于两焊芯端部在弧柱区的长度不同，伸入弧柱区中较长的焊芯从弧柱区获得更多的热量，而加快其熔化，从而起到电弧的自调节作用。

The principle of the self-regulating effect is that different heat production of cathode and anode make two cores length in the arc different . The longer weld core stretching into the arc column gets more heat from the arc column to accelerate its melting .

从评估结果中可以看出，焊芯的生产过程环境负荷较大，而矿物粉的生产过程环境负荷相对较小，其结果对指导研制环境协调型焊接材料有重要意义。

The results showes that the production of core of electrode has heavy environmental load , and marble , mica , feldspar , and fluorite has light effect on the environmental load , which are useful for guiding the research of new environmental harmonious welding materials .

双电极焊条单弧焊电弧对两焊芯的熔化存在自调节作用，即电弧燃烧过程中两焊芯端部在电弧中的长度不等，两焊芯仍能保持等速熔化，使电弧燃烧过程能够稳定进行。

The arc has a self-regulating effect on melting of two cores , that is , during the arc burning , even if the ends of two cores have different length in the arc , two cores can keep uniformly melting speed , and the arc can stably burn .