METHOD FOR DIFFUSING AND PERMEATING CREEP REINFORCEMENT MATERIAL INTO HEAT-RESISTANT METAL MEMBER, AND HEAT-RESISTANT METAL MEMBER WITH ENHANCED CREEP STRENGTH

摘要

A creep reinforcement material containing one or a plurality of elements selected from B, W, Cr, Mo, Nb, V, Hf, Zr, Ti, Cu, and Co is coated or thermally sprayed onto a surface of a heat-resistant metal member manufactured using a heat-resistant metal material, and a section coated or thermally sprayed with the creep reinforcement material is covered by a heat-resistant covering member and secured so as to contact the section. The heat-resistant metal member covered by the heat-resistant covering member is heated to a temperature of 1000° C. or greater, and thus compressive force accordingly acts on the heat-resistant metal member as it thermally expands in a direction toward the outer periphery, restraining thermal expansion of the heat-resistant metal member in the direction toward the outer periphery, and enabling the creep reinforcement material on the surface of the heat-resistant metal member to be efficiently diffused and permeated into the heat-resistant metal member.

主权项

1. A method for diffusing and permeating a creep reinforcement material into a heat-resistant metal member, the method comprising:
coating or thermally spraying a creep reinforcement material onto a surface of a heat-resistant metal member; covering, by a heat-resistant covering member, a section coated or thermally sprayed with the creep reinforcement material, and securing the heat-resistant covering member so as to contact the section; and heating the heat-resistant metal member covered by the heat-resistant covering member to a temperature of 1000° C. or greater, the creep reinforcement material containing one or a plurality of elements selected from B, W, Cr, Mo, Nb, V, Hf, Zr, Ti, Cu, and Co.