Patent ID: 8864869

Claim:
A hearth roll for a continuous annealing furnace, the hearth roll having a cermet coating comprising 60 to 80 vol % of a ceramic and a balance of a heat resistant alloy on a surface of the hearth roll, wherein the ceramic comprises: Cr 3 C 2 : over 55 to 90 vol %, Al 2 O 3 : 1 to 40 vol %, Y 2 O 3 : 0.5 to 3 vol %, ZrB 2 : 0 to 40 vol %, and a balance of unavoidable impurities and pores, and the heat resistant alloy comprises: Cr: 5 to 20 mass %, Al: 5 to 20 mass %, one or both of Y and Si: 0.1 to 6 mass %, and a balance of one or both of Co and Ni and unavoidable impurities.