所谓电火花表面熔渗硬质合金,就是应用电火花脉冲放电原理,利用脉冲电流产生的高温,使硬质合金(即WC分子)从电极上释放出来,并附着沉积扩散到工具表面上形成一层薄的硬质合金层,以提高工具,模具的表面硬度,增加耐磨性从而达到延长寿命的目的。 这种工艺由于有许多突出的优点,而日益广泛地被人们所重视和获得广泛的应用,其主要特点是: The so-called EDM surface infiltration of cemented carbide is the application of EDM pulse discharge principle, the use of pulse current generated by the high temperature, the carbide (ie WC molecules) released from the electrode, and attached to the deposition spread to form a tool surface Thin layer of hard alloy in order to improve the surface hardness of tools, molds, increase wear resistance so as to achieve the purpose of extending life expectancy. Due to many outstanding advantages of this kind of craft, it has been widely accepted and widely used by people. Its main features are as follows: