我厂生产的φ18×64毫米矿用高强度圆环链,是采用对焊方法制成的。对焊机上原来使用的电极(见图1),因要求电极不但要有良好的导电性和导热性,而且还要有很好的耐磨性和足够的高温抗压强度。所以通常采用铬青铜(QCr0.5)或铬铝镁青铜(QCr0.5-0.2-0.1)制造。我们以前所用的电极材料为QCr0.5棒料,工艺过程为下料、热锻、淬火、冷变形、 I produced φ18 × 64 mm mine with high strength circular chain, is made by the method of butt welding. The original electrode on the welding machine (see Figure 1), because the electrode requires not only have good electrical conductivity and thermal conductivity, but also have good wear resistance and sufficient high temperature compressive strength. So it is usually made of chrome bronze (QCr0.5) or chrome aluminum magnesium bronze (QCr0.5-0.2-0.1). We used the electrode material for QCr0.5 bar, the process of cutting, hot forging, quenching, cold deformation,