| 摘要 |
PROBLEM TO BE SOLVED: To provide a surface treatment method for performing surface treatment to a tool for cold rolling free from anxiety for the possibility of stress corrosion cracks and seizure in a short period of time. SOLUTION: An abnormal layer caused when a tool W for cold rolling such as a punch and a die is formed by electric discharge machining is removed by projecting fine particles at high speed by a blasting device 10. Thereafter, the surface of the tool W is mirror-finished by a shot blasting machine or an abrasive grain fluidizing and working apparatus, and further, the particles of molybdenum disulfide are projected on the surface of the tool W at≥80 m/s as abrasives. The temperature of the face collided with the abrasives in the surface of the tool W is locally raised by the conversion of velocity energy into heat energy. At this time, molybdenum disulfide undergoes cementation into the surface of the tool W. COPYRIGHT: (C)2005,JPO&NCIPI
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