| 摘要 |
PURPOSE:To carry out stable and effective hardening without remelting the surface of a material to be treated by forming a layer of a metal having a low m.p. on the surface of the material to be treated and by applying heat energy with arc to evaporate the low m.p. metal. CONSTITUTION:A layer of a metal having a low m.p. such as solder is formed on the surface of a material to be treated such as cast iron by rubbing or other method, and by applying sufficient heat energy with arc, the low m.p. metal is evaporated. Thus, the surface of the material to be treated can be maintained at a temp. below the remelting temp., and since arc goes straight toward the vapor, the surface of the material to be treated is subjected to effective transformation hardening. |
