这个发明涉及到金属表面热处理,尤其是用高功率密度电子束硬化金属表面的方法和设备。金属热处理是一项重要的工业生产工艺,利用它可赋与金属所需的各种性能,譬如韧性或硬度。在有些应用中,用钢制造切削金属的刀具,则必需尽可能加大刀具钢的硬化深度,便于定期进行刃磨,以保持其切 This invention relates to a method and apparatus for the heat treatment of metal surfaces, particularly the hardening of metal surfaces with high power density electron beams. Metal heat treatment is an important industrial production process, using it to give the metal the required properties, such as toughness or hardness. In some applications, the use of steel to make metal cutting tools, it is necessary to maximize the hardened depth of the tool steel, to facilitate regular sharpening to keep its cut