The coating includes plasma spraying ceramic wear-resistant coating and supersonic flame spraying carbide cermet coating.

The ceramic materials used in plasma spraying are mainly alumina-titanium/chromia series oxide ceramics. Such materials have outstanding properties such as high hardness, corrosion resistance, good heat resistance, and low friction coefficient. The coating structure is dense, and the surface can be polished to a mirror surface (Ra0.03-0.10 μm). For example, a 0.3-0.5 mm thick ceramic coating is sprayed on the surface of the high-pressure pump plunger, and its service life is 6 longer than that of the conventional hard chrome-plated plunger. times, is the most widely used ceramic coating.

Supersonic flame spraying cermet coating which composites nickel-chrome, cobalt base metal phase and tungsten carbide, chromium carbide etc. hard phase ceramic materials, has the characteristics of high hardness, good toughness and shock resistance etc. Its bonding strength can reach 50-80MPa.

Application：

Plunger pump plunger, high pressure cleaning machine plunger, agricultural sprayer plunger, various water seal oil seal shaft sleeves, various shaft seal sections, etc.

Coating material：

1. AT13 (Al2O3/TiO2 87%/13%): High hardness, good wear resistance.

2. Cr2O3: High hardness, low friction coefficient, good corrosion resistance, abrasive wear resistance.

3. Co-WC: Good high temperature red hardness, abrasive wear resistance, erosion resistance.

4. Ni-WC: High hardness, high temperature oxidation resistance.