Rolls of winding equipment in hot-rolling factory
In rolls of winding equipment in a hot-rolling factory, each roll includes a lower cladding layer formed on the surface of the roll barrel and a self-fluxing alloy layer formed on the lower cladding layer by thermal spraying and containing carbide particles dispersed therein. The lower cladding layer includes an Fe-based cladding layer which has a Shore hardness of 60 or greater and which contains, in terms of mass %, 0.1-0.4 C, up to 2.0 Si, up to 3.0 Mn, 1.0-15.0 Cr, and 2.5-5.0 Ni. The lower cladding layer further contains one or more of Mo, V, and Co, the contents of Mo, V, and Co being 0.1-5.0 mass %, 0.1-3.0 mass %, and 0.5-5.0 mass %, respectively.
1. A roll of winding equipment in a hot-rolling factory, comprising:
a barrel of the roll;
a lower cladding layer formed on a surface of the barrel of the roll; and
a self-fluxing alloy layer formed on the lower cladding layer by thermal spraying and containing carbide particles dispersed therein,
wherein the lower cladding layer includes an Fe-based cladding layer which has a Shore hardness of 60 or more and contains 0.1 to 0.4 mass % C, 2.0 mass % or less Si, 3.0 mass % or less Mn, 1.0 to 15.0 mass % Cr, and 2.5 to 5.0 mass % Ni, and
the self-fluxing alloy layer contains 3 to 60 mass % of the carbide particles.
2. The roll of winding equipment in the hot-rolling factory according to claim 1 , wherein the lower cladding layer further contains 0.1 to 5.0 mass % Mo.
3. The roll of winding equipment in the hot-rolling factory according to claim 2 , wherein the lower cladding layer has the Shore hardness of 60 or more when the self-fluxing alloy thermally-sprayed layer is fused for a plurality of times.
4. The roll of winding equipment in the hot-rolling factory according to claim 1 , wherein the lower cladding layer has the Shore hardness of 60 or more when the self-fluxing alloy thermally-sprayed layer is fused a plurality of times.
5. The roll of winding equipment in the hot-rolling factory according to claim 1 , wherein the lower cladding layer further contains one or more of V and Co, and contents of V and Co are 0.1 to 3.0 mass %, and 0.5 to 5.0 mass %, respectively.
6. The roll of winding equipment in the hot-rolling factory according to claim 5 , wherein the lower cladding layer has the Shore hardness of 60 or more when the self-fluxing alloy thermally-sprayed layer is fused for a plurality of times.