Patent ID: 8206518

Claim:
A method for manufacturing a die for press forming of glass, comprising: quenching and tempering a steel material to produce a base material of the die having a structure in which ε-carbide is dispersed in martensite matrix, the steel material containing carbon in an amount of 0.3 wt % or more and 2.7 wt % or less, and chromium in an amount of 13 wt % or less; coating a surface covering layer made of an amorphous Ni—P alloy on the surface of the base material; and heating the base material and the surface covering layer to change the base material into a troostitic structure or a sorbitic structure and crystallize the surface covering layer into a eutectic structure of Ni and Ni 3 P, the heating being carried out at a temperature higher than 270° C. and lower than 460° C. to form the die.