Surface treatment technology of tungsten carbide round bar and its influencing factors

Cemented carbide round bar is a commonly used material with a wide range of applications in industrial production. In order to improve the surface properties and extend the service life of Cemented Carbide Round Bar, surface treatment technology is needed. In this article, we will introduce the common surface treatment technology of tungsten carbide round bar and its influencing factors.

The common surface treatment techniques for tungsten carbide round bars mainly include polishing, pickling, plating and sandblasting.

Polishing is to polish the surface of tungsten carbide round bar by abrasive, so as to make its surface smooth and flat and eliminate surface defects. Polishing improves the appearance of the tungsten carbide round bar, enhances its wear and corrosion resistance, and improves its surface hardness.

Pickling is the process of soaking tungsten carbide round bars in an acidic solution to clean the surface by dissolving surface oxides and impurities. Pickling removes impurities such as rust, grease and dirt from the surface of the tungsten carbide round bar, improves the purity and quality of its surface and enhances its corrosion resistance.

Plating is to cover the surface of tungsten carbide round bar with a thin layer of metal, alloy or other compounds. Common plating techniques include electroplating, hot plating and chemical plating. Plating can improve the hardness, corrosion resistance and wear resistance of tungsten carbide round bars, as well as improve their appearance and decorative effect.

Sandblasting is the process of removing oxidised layers and contaminants from the surface of a tungsten carbide round bar by spraying sand grains onto the surface of the bar through a high pressure air stream or mechanical force, causing the surface to be impacted and abraded. Sandblasting can increase the roughness of the carbide round bar and provide good adhesion while improving its surface finish and quality.

The influencing factors of the surface treatment technology of Cemented Carbide Round Bar are mainly the composition, structure and shape of the Cemented Carbide material, the surface treatment process and the parameters of the equipment.

The composition and structure of Cemented Carbide materials have a greater influence on the surface treatment technology. Different compositions and structures of cemented carbide materials have different applicability and effect on surface treatment technology. For example, some Cemented Carbide materials contain metal elements that are easy to oxidise, which are prone to produce oxidised layer and need to choose appropriate pickling process to remove the oxidised layer. And some cemented carbide materials contain too many non-metallic elements, and their surface treatment is more difficult.

Surface treatment process and equipment parameters will also have an impact on the surface treatment of cemented carbide round bar. Different processes and parameters will have an impact on the surface treatment effect and quality. For example, the concentration of acidic solution, temperature and time during pickling will affect the pickling effect and speed. Sandblasting sand particle size, sandblasting pressure and sandblasting time and other parameters will affect the sandblasting effect and surface quality.

In summary, the surface treatment technology of carbide round bar is varied, and different technologies can improve its surface performance and extend its service life. Factors affecting the surface treatment effect include the composition, structure and shape of the cemented carbide material, as well as the surface treatment process and equipment parameters. By choosing suitable surface treatment technology and optimising relevant parameters, ideal surface treatment effect can be achieved.