Hearth rolls, and, the spray material with excellent resistance to build-up of Mn, thermal shock resistance, wear resistance

摘要

And an object thereof is to provide a hearth roll for a long life with excellent thermal shock resistance, and wear resistance and having resistance to build-up excellent for SOLVED] Mn-based material. A thermal spray material is sprayed on the surface of the [SOLUTION] hearth rolls, (including alloys) refractory metals that can be used at 900 ℃ or more containing Al, one or rare earth elements in two or more (Sc, a composite oxide of a transition metal except Fe and Hf, consists, 3A group of the periodic table Y, and lanthanides) and lanthanum, Zr, (Sc, Y, lanthanum A (mol), rare earth element content of Al and when the (molar) B The content of the lanthanoid), the spray material which is characterized by satisfying the condition that 0.3 ≦ (A / B) ≦ 4.0. None [Selection Figure]