Tool with wear resistant low friction coating and method of making the same
AssigneeKennametal Inc.
InventorWillard E. Henderer
Life of this patent
Estimating the term…
Abstract
A coated tool such as, for example, a cutting tool for removing material from a workpiece or a forming tool for contacting a workpiece. The coated tool includes a substrate wherein the substrate with a coating scheme on the substrate. The coating scheme comprises an outer coating region wherein the outer coating region is in contact with the workpiece during operation. The outer coating region comprises at least one layer of tribological coating material. The coating scheme has an inner coating region that comprises at least one layer of a hard coating material. Optionally, there is an adhesion coating region on the substrate and in contact with the inner coating region and/or present between the outer coating region and the inner coating region.
Claims63
A coated cutting tool for removing material from a workpiece, the cutting tool comprising:
- a substrate wherein the substrate has a rake surface and a flank surface, a cutting edge is at the intersection of the rake and flank surfaces;
- a coating on the cutting edge and on at least a portion of one or both of the rake surface and the flank surface of the substrate;
- the coating comprising an outer region wherein the outer region is in contact with the workpiece during a material removal operation;
- the outer region comprising at least one layer of tribological coating material;
- and
- an inner region comprising at least one layer of a hard coating material wherein the hard coating material includes:
- at least one transitional metal selected from the elements in Group IVa, Va and VIa of the Periodic Chart, and
- silicon and nitrogen.
A coated cutting tool for removing material from a workpiece, the cutting tool comprising:
- a substrate wherein the substrate has a rake surface and a flank surface, a cutting edge is at the intersection of the rake and flank surfaces;
- a coating on the cutting edge and at least a portion of one or both of the rake surface and the flank surface of the substrate;
- the coating comprising an outer region wherein the outer region is in contact with the workpiece during a material removal operation;
- the outer region comprising at least one layer containing molybdenum and sulfur;
- and
- an inner region comprising alternating layers of:
- a first material that contains a transition metal selected from Group IVa, Va and VIa of the Periodic Chart, and nitrogen;
- and
- a second material that contains silicon and nitrogen.
A coated cutting tool for removing material from a workpiece, the cutting tool comprising:
- a substrate wherein the substrate has a rake surface and a flank surface, a cutting edge is at the intersection of the rake and flank surfaces;
- a coating on the cutting edge and at least a portion of one or both of the rake surface and the flank surface of the substrate;
- the coating comprising an outer tribological region wherein the outer region is in contact with the workpiece during a material removal operation;
- and
- an inner region comprising alternating layers of:
- a first material that contains titanium and aluminum and nitrogen, and
- a second material that contains silicon and nitrogen.
A coated forming tool for contacting a workpiece so as to displace material into a shape, the forming tool comprising:
- a substrate that has a contact surface for contacting the workpiece;
- a coating on the contact surface of the substrate;
- the coating comprising an outer region wherein the outer region is in contact with the workpiece during a forming operation;
- the outer region comprising at least one layer of tribological coating material;
- and
- an inner region comprising at least one layer of a hard coating material comprising at least one transitional metal selected from the elements in Group IVa, Va and VIa of the Periodic Chart and silicon and nitrogen.
A coated forming tool for contacting a workpiece so as to displace material into a shape, the forming tool comprising:
- a substrate wherein the substrate has a contact surface;
- a coating on the contact surface of the substrate;
- the coating comprising an outer region wherein the outer region is in contact with the workpiece during a forming operation;
- the outer region comprising at least one layer containing molybdenum and sulfur;
- and
- an inner region comprising alternating layers of a first material that contains a transition metal selected from Group IVa, Va and VIa of the Periodic Chart and nitrogen, and a second material that contains silicon and nitrogen.
A coated cutting tool for removing material from a workpiece, the cutting tool comprising:
- a substrate wherein the substrate has a rake surface and a flank surface, a cutting edge is at the intersection of the rake and flank surfaces;
- a coating on the cutting edge and at least a portion of one or both of the rake surface and the flank surface of the substrate;
- the coating a hard coating region comprising alternating layers of a first material that comprises titanium aluminum nitride and the second material comprises silicon nitride.
Dependencies are inferred from the claim text.