OXIDATION-RESISTANT ALLOY COATING FILM, METHOD FOR PRODUCTION OF OXIDATION-RESISTANT ALLOY COATING FILM, AND HEAT-RESISTANT METAL MEMBER

摘要

A metal base material is embedded in a diffusion coating agent comprising a metal oxide, an active metal and a catalytic compound and the resulting product is heat-treated, thereby producing an oxidation-resistant alloy coating film comprising a metal constituting the metal oxide and the active metal. The metal oxide may be Al2O3, Cr2O3, SiO2, or the like. The active metal may be Hf, Zr, Y, Ti, La, Ce, Mg, Ca or the like. The catalytic metal may be NH4Cl, NH4F, HCl, NaCl, NaF or the like. The metal base material may be Ni, a Ni-based alloy, a Fe-based alloy, a Co-based alloy or the like. The heat treatment may be carried out at 700 to 1340ºC for 1 minute to 25 hours in an atmosphere of an inert gas or hydrogen gas.