Abrasive sheathing

Patent metadata

Field	Value
Publication number	US-10053994-B2
Application number	US-201514611347-A
Country	US
Kind code	B2
Filing date	Feb 2, 2015
Priority date	May 2, 2014
Publication date	Aug 21, 2018
Grant date	Aug 21, 2018

Abstract

An abrasive sheath for application to a component surface is disclosed. The abrasive sheath may comprise a metallic layer and an abrasive layer plated on a surface of the metallic layer. The abrasive layer may include a metal matrix and abrasive particles protruding from the matrix. An exposed surface of the metallic layer of the abrasive sheath may be joinable to the component surface by a heat treatment.

First claim

What is claimed is:

1. An abrasive sheath for attachment to a component surface, comprising:
a metallic layer having a thickness t 2 ; and
an abrasive layer having a thickness t 1 plated on a surface of the metallic layer and comprising a matrix consisting of a metallic material, and further comprising abrasive particles protruding from the matrix, an exposed surface of the metallic layer being joinable to the component surface by a heat treatment, wherein t 1 is greater than t 2 .

2. The abrasive sheath of claim 1 , wherein the component surface is metallic.

3. The abrasive sheath of claim 2 , wherein the abrasive particles consist of particles of cubic boron nitride.

4. The abrasive sheath of claim 3 , wherein the matrix consists of an alloy having the formula MCrAlY, where M is selected from the group consisting of Ni, Co, Fe, and combinations thereof.

5. The abrasive sheath of claim 4 , wherein the metallic layer consists of nickel foil.

6. The abrasive sheath of claim 5 , wherein the heat treatment comprises welding.

7. The abrasive sheath of claim 4 , wherein the metallic layer consists of nickel braze foil.

8. The abrasive sheath of claim 7 , wherein the heat treatment comprises brazing.

9. The abrasive sheath of claim 4 , wherein the component surface is a tip of a turbine blade of a gas turbine engine.

10. The abrasive sheath of claim 4 , wherein the component surface is a cutting surface of a cutting tool.

11. A method for attaching an abrasive sheath to a component surface, comprising:
providing the abrasive sheath, the abrasive sheath having a metallic layer having a thickness t 2 and an abrasive layer having a thickness t 1 plated on a surface of the metallic layer, wherein the abrasive layer comprises a matrix, and the abrasive layer further comprises abrasive particles protruding from the matrix, wherein the matrix consists of a metallic material and t 1 is greater than t 2 ;
placing an exposed surface of the metallic layer of the abrasive sheath in contact with the component surface; and
attaching the abrasive sheath to the component surface by a heat treatment.

12. The method of claim 11 , wherein the abrasive particles comprise particles of cubic boron nitride, and wherein the matrix consists of an alloy having the formula MCrAlY, where M is selected from the group consisting of Ni, Co, Fe, and combinations thereof.

13. The method of claim 11 , further comprising shaping the abrasive sheath to cause the abrasive sheath to conform to a shape of the component surface, prior to attaching the abrasive sheath to the component surface by the heat treatment.

14. The method of claim 11 , wherein the metallic layer consists of nickel foil.

15. The method of claim 14 , wherein attaching the abrasive sheath to the component surface by the heat treatment comprises welding the metallic layer to the component surface.

16. The method of claim 12 , wherein the metallic layer consists of nickel braze foil.

17. The method of claim 16 , wherein attaching the abrasive sheath to the component surface by the heat treatment comprises brazing the metallic layer to the component surface.

18. A component having a surface covered with an abrasive sheath, the component being fabricated by a method comprising:
providing a metallic layer having a thickness t 2 ;
plating an abrasive layer having a thickness t 1 on a surface of the metallic layer to provide the abrasive sheath, the abrasive layer comprising a matrix and abrasive particles protruding from the matrix, wherein the matrix consists of a metallic material and t 1 is greater than t 2 ;
placing an exposed surface of the metallic layer in contact with the surface of the component; and
attaching the abrasive sheath to the surface of the component by a heat treatment.

19. The component of claim 18 , wherein the abrasive particles comprise particles of cubic boron nitride, and wherein the matrix consists of an alloy having the formula MCrAlY, where M is selected from the group consisting of Ni, Co, Fe, and combinations thereof.

Assignees

• United Technologies Corp

Inventors

• Stratton Eric W
• Minor Michael J

Classifications

• F05D2300/11

  Iron · CPC title

• B24D3/06

  metallic {or mixture of metals with ceramic materials, e.g. hard metals, "cermets", cements} · CPC title

• B23K2201/001

  Operations & Transport · mapped topic

• F05D2240/307

  related to the tip of a rotor blade · CPC title

• F05D2300/177

  Ni - Si alloys · CPC title