Hannecord Logo Hannecard Roller Coatings, Inc - ASB Industries Logo


ASB Internal Study on Carbide Spray Materials

Four WC-12wt.%Co Powders from Different Powder Suppliers and Their (powders) Effect on the As-Sprayed WC-Co Coatings Microstructure and Average Surface Roughness (Ra)

Four tungsten carbide-cobalt powders were HVOF sprayed. All the powders were sprayed with same parameters and condition, using ASB Paramaeters as the reference.  Powder 1 showed the highest deposition efficiency (DE), lowest average surface roughness and highest coating thickness than the other as-sprayed coatings. These observations could be related to the range of particle size distribution (PSD) which has strong effect on the DE of the powders.

Particle size distribution of powder 1 is the lowest compared to that of other powders. Powder 1 gives the best microstructure, with powder 3 having the next acceptable microstructure. Since, uniform distribution of fine carbides is required for high hardness values, it is anticipated that the powder 1 coating presents best hardness value. Powder 4 had the worst microstructure, with most of the carbides forming clusters. Powder 2 coating also show considerable clustering. Considering the DE values, surface roughness, hardness, uniform distribution of fine carbides, coating thickness, the Powder 1 was considered to be the best material for production of WC-Co protective and wear resistant coatings in this study.

Tungsten Carbide Powder

Tungsten Carbide Photomicrographs


Featured Applications
  • Ceramic Seal Surface Rebuild and Protection
    Ceramic Thermal Spray Seal surfaces on rotating components may require a wear resistant surface against a seal material made of rubber, composite or metal ring to function in a multitude of applications. Corrosive, hard particles or friction along with--

    ASB Internal Study on Carbide Spray Materials

    Powder Study

    Materials  ASB purchases from suppliers is a key to providing a quality coating. Besides coating quality, there are other factors including surface finish results, material transformation through the thermal spray process and efficiency of material being depoisited.  The following is a study---

  • Monkal Polyurethane Roller Coverings
    (Jul 18, 2022)
    Polyurethane equipment has been commissioned and operational. With materials on-site, our equipment manufacturer worked with our Hannecard technicians to operate equipment with technical detail from equipment operations to handling materials—

    Maidan Voyage Joining Continents
    (Aug 6, 2021)

    The first 40'HC container for the main materials, mixtures and tools is leaving Hannecard Belgium today to reach Hannecard USA (HRC) in Barberton, Ohio, USA--