电火花强化法,是利用脉冲电路的充放电原理,采用硬质合金,石墨、合金钢、铜或铝等导电材料作为工具电极,在空气或特殊的气体中使之与被强化的金属工件之间产生火花放电,直接利用火花放电的能量,将电极材料成份转移至工件表面,构成强化层的一种强化方法。它能够改善工件表面的物理化学性能,提高表面硬度、耐磨性、耐蚀性和红硬性而又保持基体硬度、强度和韧性 EDM is the use of pulse charging and discharging principle, the use of hard alloy, graphite, alloy steel, copper or aluminum and other conductive materials as a tool electrode, in the air or a special gas to be strengthened with the metal parts Between the spark discharge, the direct use of spark discharge energy, the electrode material components transferred to the workpiece surface, constitute a strengthening layer of an enhanced method. It can improve the physical and chemical properties of the workpiece surface, improve the surface hardness, wear resistance, corrosion resistance and red hardness while maintaining the substrate hardness, strength and toughness