| 摘要 |
A steel base material is hardened to produce the base material having a martensite structure, a surface coating layer made of an amorphous Ni-P alloy is formed on the surface of the base material, and the base material is heat-treated to transform the structure of the base material into a troostite structure or a sorbite structure and also to transform the structure of the surface coating layer into an eutectic structure of Ni and Ni3P. This prevents the surface coating layer from producing cracks at the molding temperature and prevents the plastic deformation of the mold, thereby maintaining the shape of the mold with high accuracy.
|
