Claims
- 1. A method comprising:
thermal spraying a coating material on an article, wherein said coating material includes chromium nitride or chromium carbide and chromium silicide.
- 2. The method of claim 1, wherein said coating material is a powdered coating material.
- 3. The method of claim 1, wherein said coating material includes chromium nitride.
- 4. The method of claim 3, wherein said coating material is about 50-90 wt % chromium nitride and the balance nickel-chromium alloy.
- 5. The method of claim 4, wherein said coating material is about 70 wt % chromium nitride.
- 6. The method of claim 1, wherein said coating material includes chromium carbide and chromium silicide.
- 7. The method of claim 6, wherein said coating material is about 50-99 wt % chromium carbide and chromium silicide and the balance nickel-chromium alloy.
- 8. The method of claim 7, wherein said coating material is about 70 wt % chromium carbide and chromium suicide.
- 9. The method of claim 1, wherein said article is a piston ring.
- 10. The method of claim 1, wherein said thermal spraying step further includes:
melting said coating material; propelling said molten coating material toward said article; and coating said article with said molten coating material.
- 11. The method of claim 10, wherein said coating step includes coating said article to a thickness of 50-200 μm.
- 12. The method of claim 10, wherein said melting step includes:
melting said coating material in a fuel and oxygen flame.
- 13. The method of claim 10, wherein said melting step includes:
melting said coating material in a plasma flame.
- 14. The method of claim 13, wherein said melting step includes:
creating said plasma flame by passing a fuel gas through an electric arc powered by 60 volts and 900 amps.
- 15. The method of claim 13, wherein said melting step includes:
creating said plasma flame with an argon and helium fuel gas.
- 16. The method of claim 13, wherein said melting step includes:
creating said plasma flame with more than 200 standard cubic feet/hour of fuel gas.
- 17. The method of claim 1, further comprising processing said article after the coating step.
- 18. A method comprising:
thermally spraying a coating material on to an article, wherein the spraying step includes a step selected from the following group: placing the article within 3 inches of a thermal spraying heat source, providing a fuel gas flow rate of at least 200 standard cubic feet/hour, providing an electric arc plasma flame with at least 50 volts and 800 amps, providing a fuel gas of argon and helium, and combinations thereof.
- 19. A method comprising:
melting a chromium nitride coating material or a chromium carbide and chromium silicide coating material in a plasma flame; propelling said molten coating material to a piston ring; and coating said piston ring with said molten coating material, wherein said melting step includes a step selected from the following group: providing a fuel gas flow rate of at least 200 standard cubic feet/hour, providing an electric arc plasma flame with at least 50 volts and 800 amps, providing a fuel gas of argon and helium, and combinations thereof.
Parent Case Info
[0001] This application is a continuation-in-part of U.S. patent application Ser. No. 10/227,896 filed Aug. 26, 2002.
[0002] This invention relates to an improved method for creating wear resistant articles.
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
10227896 |
Aug 2002 |
US |
Child |
10255814 |
Sep 2002 |
US |