CERMET POWDER FOR SPRAYED COATING EXCELLENT IN BUILD-UP RESISTANCE AND ROLL HAVING SPRAYED COATING THEREON

摘要

A cermet powder for a sprayed coating for an in-furnace conveyance roll of a heat treating furnace for a steel belt, characterized in that it comprises an alloy powder comprising 3 to 8 mass % of Al, 16 to 25 mass % of Cr and 0.1 to 1 mass % of Y, the balance of the alloy being one or more selected from Co and Ni, and a ceramic powder comprising one or more of 1 to 5 mass % of a boride and 5 to 10 mass % of a carbide, wherein the percentages are relative to the total amount of the cermet powder. The cermet powder is suitably used for spraying onto the surface of the above-mentioned roll for a high tensile steel belt to form a sprayed coating.