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5404 |
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Friday, June 09, 2017, Hall 28 12:20 PM Cold Gas Spraying III |
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Effect of spraying parameters on the bonding strength of detonation sprayed WC-Ni coatings |
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Sergey Baldaev* / Technological Systems for Protective Coatings, Ltd., Russian Federation Lev Baldaev / TSPC, Ltd., Russia Boris Khamitsev/ TSPC, Ltd., Russia |
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Well-known detonation thermal spraying is considered to be a good method for the preparation of WC-based coating with high adhesion. The depositing parameter especial the fuel-oxygen ratio and spot frequency observably influence the properties of the coating. In this study a detonation thermal sprayed WC-Ni coatings were deposited on the low carbon steels substrates. The microstructure, hardness, phase state, bonding strength of the coatings were investigated. The results demonstrated that with increases the fuel-oxygen ratio and spot frequency of detonation result in the hardness and bonding strength of the coatings increased. High fuel-oxygen ratio and spot frequency decelerated the decomposition of the WC-phase, which provide high mechanical properties. |