| 摘要 |
PURPOSE:To form a chilled layer with high hardness, fatigue strength and heat resistance and to enable the easy partial chilling of large-sized or complex- shaped parts by irradiatng a metalic surface to be chilled with heat rays having high density energy. CONSTITUTION:A metallic surface to be chilled is irradiated with heat rays having high density energy for a short time. The heat rays act on the necessary part in a state in which a strain is hardly produced by the affection of heat, and the surface part is instantaneously melted by properly regulating the quantity of energy. A dense chilled structure is obtd. by self-cooling action due to heat conduction to the periphery. The part having the formed remelted chilled layer has superior suface characteristics such as superior fatigue strength, wear resistance and erosion resistance. |
