A study on evaluating the mechanical recovery of the crankshaft by using thermal spray technology
Long Vuong Hoang†, Dinh Tuyen Nguyen‡ *, Hung Chien Do‡, Minh Nhat Nguyen‡†*
† Faculty of Mechanical Engineering, Industrial University of Ho Chi Minh City (IUH), Ho Chi Minh city, Vietnam
‡ Mechanical Engineering Institute, Ho Chi Minh City University of Transport, Ho Chi Minh city, Vietnam ‡† Engineering Institute, Ho Chi Minh City University of Technology (HUTECH), Ho Chi Minh city, Vietnam
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Thermal spraying can use materials with different physical and chemical properties: metals, alloys, metal seals, ceramic oxides, heat-resistant materials, materials with different melting temperature, making temperature the job does not exceed 800oC. The thermospray can produce different injection rates suitable for different types of spraying materials and adhesion requirements. Available in thicknesses ranging from 10 μm to 10 mm. The surface temperature of the part is heated because the coating material transfers heat, does not exceed the phase transition temperature, so does not cause organizational change, ensures the organization and original properties of the base material. The coating has good adhesion to the base metal, small porosity and residual stress, and should be used for many parts with complex loads and good fatigue resistance. In this paper, a test procedure evaluates the mechanical properties of a crankshaft that is sprayed with a layer of alloy 67Ni15Cr5Si4B for recovery and improve the hardness and adhesion of the coating material to that of the substrate.