Performance Studies on Various Titanium Carbide Coating Alloys on Grey Cast Iron using the Detonation Gun Thermal Spray Coating Method
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Abstract
The Detonation gun (D-gun) stands as a pioneering high-velocity thermal spray method, renowned for endowing coatings with exceptional adhesive strength, minimal porosity and a surface characterized by compressive residual stresses. The thrust of this research centers on investigating the impact of titanium carbide (TiC) coatings on grey cast iron (GI300) substrates. Grey cast iron, prominently employed in automotive applications such as gears, engine blocks, manifolds and disc brake rotors, is subjected to wear-resistant coatings to predominantly augment the longevity of the components. The study introduces three distinct coating materials: titanium carbide (TiC), titanium chromium (Ti/Cr) and titanium cobalt (Ti/Co) powders. Utilizing the D-gun coating method, these materials are applied to the grey cast iron substrate, forming a protective shield against surface-related challenges, including wear, corrosion, erosion and fatigue. In the context of automotive engineering, where these components are exposed to demanding conditions, the introduction of titanium-based coatings becomes pivotal for extending the service life of the grey cast iron elements. The choice of TiC, Ti/Cr and Ti/Co powders underscores the versatility of coating options, each with unique properties that contribute to the overall enhancement of substrate performance. Comparative analysis between the coated and uncoated GI300 substrate underscores the efficacy of titanium coatings. The titanium-coated substrate exhibits a noteworthy reduction in cumulative volume loss, wear rate and coefficient of friction. This reduction implies improved resistance to material loss, decreased frictional forces and enhanced overall durability-a critical factor for automotive components subjected to diverse environmental and operational stresses.
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