Hearth rolls, thermal spray materials, and methods for manufacturing hearth rolls
The hearth roll with a thermal spray coating of ceramic and metal components addresses build-up issues, improving resistance and maintaining steel sheet quality, thus enhancing productivity.
JP7876703B2Active Publication Date: 2026-06-19NIPPON STEEL CORPORATION +1
Patent Information
- Application Number
- JP2025502784
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- Priority Date
- 2023-02-24
- Filing Date
- 2024-02-22
- Publication Date
- 2026-06-19
- Estimated Expiration
- 2044-02-22
Smart Images
Figure 0007876703000001 
Figure 0007876703000002
Abstract
Provided is a hearth roll comprising a hearth roll base material and a thermal spraying coating that is formed on a surface of the hearth roll base material, said hearth roll being characterized in that: the thermal spraying coating comprises 20-80 mass% of a ceramic component and 20-80 mass% of a metal component, in terms of percentage with respect to the thermal spraying coating; the ceramic component comprises 20-80 mass% of a nitride, 0-50 mass% of a carbide, and 0-1 mass% of an oxide, in terms of percentage with respect to the thermal spraying coating; the nitride is a nitride of one or more elements selected from the group consisting of Cr, Ta, and La; the carbide is a carbide of one or more elements selected from the group consisting of Cr, Ta, and La; and the metal component is a Ni-based alloy including Cr and Mo.
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Citation Information
Patent Citations
Method to reuse recovered casting sand
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Roll and its producing method
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Hearth roll having excellent build-up resistance, thermal impact resistance and wear resistance, and thermal spraying material
JP2005206930A
HEARTH ROLL SUPERIOR IN Mn BUILD-UP RESISTANCE, THERMAL SHOCK RESISTANCE AND ABRASION RESISTANCE, AND THERMAL SPRAYING MATERIAL THEREFOR
JP2007321203A
Thermal spray coating on hearth rolls for continuous annealing furnaces for steel plates
JP4332449B2