| 摘要 |
PURPOSE: To solve the problem that, in the metallic parts of various industrial machines and machines for general use, characteristics to be required such as corrosion resistance, wear resistance and heat resistance are extremely variable according to their use, therefore thermal spraying technology is adopted in many cases as the solving means, but the toughness and impact resistance of a sprayed coating film are low. CONSTITUTION: The composite thermal spraying powder material of WC/ chromium carbide/Ni or an Ni base alloy has the particle size of 6 to 63μm and contains a ceramic phase consisting of WC powder and chromium carbide powder of 75 to 95 wt.% and a metallic bonding phase consisting of Ni or Ni base alloy powder of 5 to 25 wt.%, and in which the average particle size of the primary particles of the WC powder constituting the ceramic phase is 5 to 20μm, and the average particle size of the primary particles of the chromium carbide powder is 1 to 10μm. The thermal spraying method and the sprayed coating film use this powder material. |
