Laser Cladding of TiN-Based Coating on 00Cr13Ni4Mo Hydro Turbine Blade Stainless Steel for Improvement of Wear Resistance

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To improve the wear propery of 00Cr13Ni4Mo hydro turbine blade stainless steel, TiN-based coating was fabricated on 00Cr13Ni4Mo stainless steel by laser cladding using mixed powders of Ni60 and TiN. The microstructure of the coating was characterized by XRD and SEM techniques. The wear behaviour of the coating was also investigated. The wear resistance of the coating was evaluated under dry sliding wear condition at room temperature. The results show that the coating mainly consists of Ni-based solid solution and TiN phases. The coating exhibits excellent wear resistance due to its high hardness of TiN phase. The main wear mechanisms of the coating and the 00Cr13Ni4Mo sample are different, the former is abrasive wear and the latter is adhesive wear.

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726-730

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February 2013

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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