20130330520 | HEARTH ROLL HAVING EXCELLENT MN BUILD-UP RESISTANCE, THERMAL SHOCK RESISTANCE, AND ABRASION RESISTANCE, AND THERMAL SPRAY MATERIAL THEREFOR - A long-life hearth roll having excellent build-up resistance against Mn-based substances, and which has excellent thermal shock resistance and abrasion resistance is provided. The thermal spray material that is thermally sprayed onto a surface of the hearth roll is characterized by including a heat resistant metal (including an alloy) that includes Al and can be used at 900° C. or more, and a complex oxide of one kind or two kinds or more of a rare earth element (Sc, Y, lanthanum, and lanthanoids) and a transition metal excluding group 3A of the periodic table, Zr, Hf, and Fe, wherein when an Al content is A (moles), and a rare earth element (Sc, Y, lanthanum, and lanthanoids) content is B (moles), the thermal spray material satisfies a condition of 0.3≦(A/B)≦4.0. | 12-12-2013 |
20110104449 | HEARTH ROLL HAVING EXCELLENT MN BUILD-UP RESISTANCE, THERMAL SHOCK RESISTANCE, AND ABRASION RESISTANCE, AND THERMAL SPRAY MATERIAL THEREFOR - Disclosed is a hearth roll having excellent build-up resistance against an Mn-containing substance, excellent thermal shock resistance, excellent wear resistance and a long lifetime. Specifically disclosed is a thermal spraying material to be thermally sprayed on the surface of a hearth roll. The thermal spraying material comprises: a heat-resistant metal (including an alloy) which contains Al and can be used at a temperature equal to or higher than 900° C.; and a multiple oxide of at least one metal selected from rare earth elements (Sc, Y, lanthanum and lanthanoid), metals belonging to Group 3A on the periodic table and transition metals excluding Zr, Hf and Fe, wherein the content of Al (A) (mole) and the content of the rare earth clement (Sc, Y, lanthanum and lanthanoid) (B) (mole) fulfill the requirement represented by the following formula: 0.3≦(A/B)≦4.0. | 05-05-2011 |