Bearing component having a metallic base body and an alloy-steel coating
AssigneeAktiebolaget Skf
InventorJuergen Gegner
Life of this patent
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Abstract
A bearing component such as a bearing ring includes a metallic base body and at least one alloy steel coating on the base body, the coating being applied to the base body by deposition welding. The base body is preferably non-alloy steel or cast iron, and the alloy includes at least one carbide-forming transition metal such as niobium, tantalum, zirconium, titanium, hafnium, tungsten, molybdenum, vanadium, or manganese. The coating can form a raceway of the bearing component or a structural element such as a flange. Also a method of forming such a bearing component is provided.
Claims19
A bearing including:
- an outer ring having an outer ring raceway;
- an inner ring disposed within the outer ring and having an inner ring raceway facing the outer ring raceway, the inner and outer ring raceways being movable relative to each other;
- wherein at least one of the outer ring and the inner ring has:
- a metallic base body, and
- at least one steel alloy cladding fused to the base body and defining at least one of the outer ring raceway and the inner ring raceway, and
- wherein the at least one steel alloy cladding comprises an alloy of a base steel, 0-0.1 wt. % vanadium, and at least one carbide-forming transition metal selected from the group consisting of 0.5-1.5 wt % niobium, 2.5-3.5 wt % tantalum, and 1.5-2.5 wt % zirconium;
- and
- wherein the at least one steel alloy cladding further comprises one or more additional elements selected from the group consisting of:
- 0.1 to 1.0 wt % silicon,
- 0.1 to 1.5 wt % manganese, and
- 0.5 to 2.5 wt % chromium.
A bearing ring comprising:
- a core composed of non-alloy steel that comprises up to 0.4 wt % carbon;
- and
- a cladding fused to a raceway surface of the core, the cladding being composed of a steel that comprises 0.8-1.2 wt % carbon, 0 to 0.1 wt. % vanadium and 1-3 wt. % of at least one carbide-forming transition metal selected from the group consisting of niobium, tantalum, and zirconium;
- wherein the steel of the cladding further comprises one or more additional elements selected from the group consisting of:
- 0.1 to 1.0 wt % silicon,
- 0.1 to 1.5 wt % manganese, and
- 0.5 to 2.5 wt % chromium.
A bearing ring comprising:
- a core composed of non-alloy steel that comprises up to 0.4 wt % carbon;
- and
- a cladding fused to a raceway surface of the core, the cladding being composed of a steel that comprises 0.8-1.2 wt % carbon, 0-0.1 wt. % vanadium and at least one carbide-forming transition metal selected from the group consisting of 2.5-3.5 wt % tantalum and 1.5-2.5 wt % zirconium.
Dependencies are inferred from the claim text.