Two Blended Tungsten Carbide for Hardfacing & Wear Resistance

Hardfacing is a welding process of creating deposits of alloys to achieve properties of abrasion, corrosion, high temperature, or impact resistance.  Hardfacing can enhance the service life of machine components and can consequently increase the efficiency of machinery and reduce the possibility that an equipment is scrapped.  Alloys that are typically used for hardfacing include cobalt based alloys, nickel based alloys, iron based alloys, and carbides.

Once frequent mentioned idea of wear resistance is that the harder the better, but it is not correct. When a demand of wear resistance is asked, the higher hardness of material deposit does not always provide the better performance. However, the presence of carbides must be considered in addition to hardness properties. Compared to a chromium carbide overlay, the service life of a machine component hardfaced with tungsten carbide can be increased to 3 - 5 times.

Tungsten carbide is mostly used in low temperature compared to cobalt and nickel based alloys. Besides, it has one of the most primary wear resistant properties in terms of metal-to-earth abrasion compared to cobalt based alloys’ metal-to-metal. The material can thus be applied to mining, oil and construction industries. The specific applications include dredge cutters, bucket teeth, elbows & pipes, and oil drilling bits.

Wisdom offers two kinds of tungsten carbide powder, one with a Ni-Cr-B-Si matrix, and another with a Ni-B-Si matrix. The nickel matrix typically consists of around 40% of the chemical composition while the tungsten carbide is responsible for the rest 60%. Both of the two alloy powder have a macro crystalline carbide structure. However there exists differences. To use Ni-Cr-B-Si blended with tungsten carbide or free of chrome is determined by the given working condition. Please consult us to guide you choosing the right product.