Powder for thermal spraying
Disclosed is a thermal spray powder of granulated and sintered cermet particles, which contains tungsten carbide or chromium carbide, and a silicon-containing iron-based alloy. The content of the alloy in the thermal spray powder is preferably 5 to 40% by mass. In this case, the alloy contains silicon in a content of 0.1 to 10% by mass.
1. A thermal spray powder comprising granulated and sintered cermet particles, wherein the powder contains tungsten carbide or chromium carbide, and a silicon-containing iron-based alloy, wherein the alloy contains silicon in a content of about 3% to 10% by mass.
2. The thermal spray powder according to claim 1 , wherein the alloy is contained in the thermal spray powder in a content of 5 to 40% by mass.
3. The thermal spray powder according to claim 2 , wherein the alloy further contains 0.5 to 20% by mass of chromium.
4. The thermal spray powder according to claim 3 , wherein the alloy further contains 5 to 20% by mass of nickel.
5. The thermal spray powder according to claim 4 , wherein the alloy further contains at least one of aluminum, molybdenum, and manganese.
6. The thermal spray powder according to claim 5 , wherein the tungsten carbide or chromium carbide accounts for the balance of the thermal spray powder excluding the alloy.
7. The thermal spray powder according to claim 2 , wherein the alloy further contains 5 to 20% by mass of nickel.
8. The thermal spray powder according to claim 2 , wherein the alloy further contains at least one of aluminum, molybdenum, and manganese.
9. The thermal spray powder according to claim 1 , wherein the tungsten carbide or chromium carbide accounts for the balance of the thermal spray powder excluding the alloy.
10. A method of forming a thermal spray coating, comprising thermally spraying the thermal spray powder according to claim 1 by cold spraying to form the thermal spray coating.
11. A method of forming a thermal spray coating, comprising thermally spraying the thermal spray powder according to claim 1 by high pressure cold spraying to form the thermal spray coating.
12. A method of forming a thermal spray coating, comprising thermally spraying the thermal spray powder according to claim 1 by low pressure cold spraying to form the thermal spray coating.
13. The thermal spray powder according to claim 1 , wherein the granulated and sintered cermet particles have a liquid phase appearance temperature of about 1,150 Corless.
14. The thermal spray powder according to claim 1 , wherein the granulated and sintered cermet particles have a compressive strength of about 100 MPa to about 800 MPa.