The market of thermal spraying coatings and other advanced materials is on the rise, and superhard coatings are mainly used for surface renovation of some metal workpieces to minimize mechanical wear and prolong the wear-resistant life of the workpieces.
For example, tungsten carbide coating is used for low-temperature corrosion resistance, nickel-chromium chromium carbide is used for high-temperature (1000℃) environment, and cobalt-chromium tungsten carbide coating can improve the wear resistance by more than 4-6 times.
Wire flame spraying and powder plasma arc spraying are common methods for processing wear-resistant coatings, and the well-known supersonic flame spraying (HVOF) can form the microstructure density closest to forging materials.
All these coatings belong to superhard coatings that are difficult to grind, and are often used for complex 3D-shaped workpieces. In the grinding and polishing process, it is a great challenge to achieve ideal surface processing effect and maintain high productivity.
Diamond flexible abrasive belt is the most efficient tool for grinding and polishing superhard coatings, especially for grinding and polishing plane, cambered surface and some complex 3D-shaped workpieces, and the effect is more remarkable.
For some complicated workpieces that are difficult to polish by other processes, diamond abrasive belt perfectly balances the relationship among cutting force, flexibility, strength, workpiece surface roughness and polishing efficiency.
In this paper, Nanjing Naiyan New Materials Co., Ltd. shares the case of precision grinding and polishing of tungsten carbide coated rotor, and takes you in-depth understanding of its technical application and advantages.
Workpiece Name: Rotor
Industry: petroleum, food, natural gas
Workpiece material: tungsten carbide coating
A: Easy-to-reach area B: Less-to-reach area C: Difficult-to-reach area
Polishing mode and effect:
1. The fixed belt sander can provide stable, continuous and consistent treatment effect.
2. The manual belt sander can flexibly handle some hard-to-touch surfaces.
Using diamond abrasive belt, the finish of fine grinding effect can reach Ra < 0.05 um, and the polishing effect can reach Ra＜0.05um.
Craftsmanship grinding, wisdom leading the future
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