Coated Cutting Tools Having a Platinum Group Metal Concentration Gradient and Related Processes
First Claim
Patent Images
1. A cutting tool comprising:
- a substrate comprising hard particles and a binder, the binder comprising a near-surface platinum group metal concentration gradient; and
at least one wear resistant coating on at least a portion of the substrate.
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Abstract
The present disclosure is directed to cutting tools. The disclosed cutting tools may have a wear resistant coating on a substrate. The substrate may have hard particles cemented in a binder phase. The binder may have a near-surface concentration gradient of at least one platinum group element and/or rhenium. Processes for producing cutting tools are also disclosed.
113 Citations
36 Claims
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1. A cutting tool comprising:
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a substrate comprising hard particles and a binder, the binder comprising a near-surface platinum group metal concentration gradient; and at least one wear resistant coating on at least a portion of the substrate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 34)
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17. A cutting tool comprising:
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a cemented carbide substrate comprising tungsten carbide particles and a cobalt binder, the binder comprising a near-surface platinum group metal concentration gradient of 10 weight percent to 100 weight percent platinum group metal on a total binder weight basis at the substrate surface and logarithmically decreasing with depth to background levels of platinum group metal; wherein the platinum group metal is selected from the group consisting of ruthenium, osmium, rhodium, iridium, palladium, platinum, and combinations of any thereof; and at least one wear resistant coating on at least a portion of the substrate, the coating comprising a metal carbide, metal nitride, metal carbonitride, metal boride, metal silicide, metal oxide, or combination of any thereof, of a group IIIA, group IVA, group IVB, group VB, or group VIIB metal. - View Dependent Claims (35)
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18. A process for producing a cutting tool comprising:
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depositing at least one platinum group metal onto at least a portion of a surface of a substrate comprising hard particles and a binder; heating the substrate at a temperature and for a time sufficient to cause at least one platinum group metal to diffuse into the binder and form a near-surface platinum group metal concentration gradient in the binder; and depositing a wear resistant coating onto the substrate surface after heating the substrate and forming the near-surface platinum group metal concentration gradient in the binder, - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 36)
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Specification