Surface treatment for ferrous components
AssigneeCaterpillar Inc.
InventorsJared A Black, Matthew Thomas Kiser, Gary Leroy Biltgen
Life of this patent
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Abstract
A method for treating a surface of a first component wherein at least a portion of the surface of the first component contacts a surface of a second component. The method includes forming a compound layer at at least a portion of the surface of the first component by a thermochemical diffusion treatment and isotropically finishing the at least a portion of the surface of the first component that contacts the surface of the second component.
Claims21
A method for treating a surface of a first component, wherein at least a portion of the surface of the first component contacts a surface of a second component comprising:
- forming a compound layer at at least a portion of the surface of the first component by a thermochemical diffusion treatment;
- and
- isotropically finishing the at least a portion of the surface of the first component that contacts the surface of the second component.
A method for treating a surface of a track bushing, wherein at least a portion of the surface of the track bushing contacts a polymeric component to form a seal, the method comprising:
- subjecting the surface of the track bushing to a thermochemical diffusion treatment to form a compound layer;
- and
- isotropically finishing at least the portion of the surface of the track bushing that contacts the polymeric component to a surface roughness of Ra≦0.1 μm.
A track bushing comprising a surface, wherein at least a portion of the surface is isotropically finished and includes a compound layer.
A track comprising:
- a plurality of track links, each of the plurality of track links including a bore at a first end and a second end;
- a plurality of bushing assemblies, wherein the plurality of bushing assemblies join adjacent track links by residing in the bore at the second end of a first track link and the bore at the first end of a second track link, and wherein each of the plurality of bushing assemblies includes,
- a steel bushing having an isotropically finished surface, wherein the isotropically finished surface includes a compound layer, and
- a pin that fits in the steel bushing;
- and
- polymeric seals that contact the isotropically finished surface of the steel bushing and an inside surface of the bore of at least one of the adjacent track links.
Dependencies are inferred from the claim text.