SURFACE TREATMENT METHOD FOR METAL MOLD BY ELECTRONIC BEAM IRRADIATION AND TREATED METAL MOLD

摘要

PROBLEM TO BE SOLVED: To finish a metal mold with low surface roughness in a short time by overcoming a fault in hand polishing the mold which is applied to electrical discharge machining.;SOLUTION: In a surface treatment method for a metal mold, a mold material made of carbon steel is smoothed, improved in corrosion resistance, polished, and improved in surface hardness by using a low energy pulse electronic beam apparatus capable of forming a large area without causing electronic beam scattering due to the existence of anode plasma. The electronic beam irradiation method is performed under a condition that energy density ≥1 J/cm², the number of pulse irradiations ≥5 times, and a pulse width ≥1 μs. The metal mold is applied with surface treatment by the method.;COPYRIGHT: (C)2004,JPO