Title : Investigation of the composition and morphology of hardfacing welding powder
Abstract:
Hardfacing is a welding process used to apply a protective layer of wear-resistant material onto the surface of a metal component. This process is employed to extend the life of industrial equipment and machinery that is subjected to abrasive or erosive wear, impact, and corrosion. Common hardfacing materials include alloys containing chromium, tungsten carbide, cobalt, nickel, or a combination of these. One significant disadvantage of hardfacing welding is its limited coverage and thickness capabilities. Hardfacing is typically applied as a relatively thin layer to specific areas of a component that are prone to wear or corrosion. This means that not all parts of the component receive the protective hardfacing layer, leaving some vulnerable to damage. Additionally, the thickness of the hardfaced layer is restricted, making it unsuitable for applications requiring substantial material buildup. For very thick layers, multiple passes may be necessary, leading to increased costs, potential distortion of the component, and limitations in its effectiveness. These constraints can make hardfacing less suitable for scenarios where comprehensive protection or significant material reinforcement is needed. In our research, we conducted a thorough analysis of tungsten carbide-based hardfacing welding materials, commonly applied in creating a protective coating for plastic extruder dies. Our investigation encompassed both the powder composition and the properties of the welded section, utilizing techniques like SEM, EDS, and X-ray analysis. Our goal was to understand the material's behavior during the hardfacing welding procedure and to explore the potential of substituting this traditional method with a laser-based additive manufacturing technique, aiming to produce a more robust and thicker protective layer.
Audience Take Away Notes:
- This study shows a comprehensive material characterization on the metal powder used in hardfacing welding process
- This study uncovers the detailed composition and structure of the hardfacing material utilized in creating the protective coating for the die of a plastic extruder
- This study suggests substituting the conventional hardfacing welding approach with an innovative additive manufacturing process
