工具钢的制造工艺包括VIM法、VAR法、ESR法等。VIM法为高真空下通过电磁感应对金属进行熔炼、精炼和浇铸的工艺方法。这种工艺具有以下优点:不受大气污染,可以准确添加和调节活性金属,依靠真空精炼去除非金属夹杂物。VIM法作为一次熔炼工艺常与VAR法或者ESR法联合用于制造高级金属材料。虽然VIM法适用于工具钢的情况不多,但由于这种工艺具有准确调节活性金属、去除非金属夹杂物效果好的优点,因此适用于特殊的模具钢、切削工具用钢 Tool steel manufacturing processes include VIM method, VAR method, ESR method. The VIM method is a process of melting, refining and casting metals by electromagnetic induction under high vacuum. This process has the following advantages: free from air pollution, can accurately add and adjust the active metal, rely on vacuum refining to remove non-metallic inclusions. VIM method as a melting process often combined with VAR method or ESR method for the manufacture of advanced metal materials. Although the VIM method for tool steel is not much, but because of this process with accurate regulation of the active metal, removal of non-metallic inclusions good effect, it is suitable for special die steel, cutting tool steel