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http://dx.doi.org/10.3740/MRSK.2015.25.9.442

Wear Property of Diamalloy-4006 Coating Prepared by OCP HVOF Thermal Spraying  

Joo, Yunkon (Department of Materials Science and Engineering, Engineering Research Center(ERC) for Integrated Mechatronics Materials and Components, Changwon National University)
Yoon, Jaehong (Department of Materials Science and Engineering, Engineering Research Center(ERC) for Integrated Mechatronics Materials and Components, Changwon National University)
Jung, Yeongil (Department of Materials Science and Engineering, Engineering Research Center(ERC) for Integrated Mechatronics Materials and Components, Changwon National University)
Lee, Jehyun (Department of Materials Science and Engineering, Engineering Research Center(ERC) for Integrated Mechatronics Materials and Components, Changwon National University)
Publication Information
Korean Journal of Materials Research / v.25, no.9, 2015 , pp. 442-449 More about this Journal
Abstract
The effects of coating parameters were investigated in wear resistance coatings of Diamalloy-406 on Inconel 718 to obtain an optimum coating condition by high velocity oxy-fuel spraying. The coating parameters, the flow rates of source gases (hydrogen and oxygen), the powder feed rate, and the spray distance, were designed by the Taguchi method. The optimal conditions were determined: oxygen flow rate 34 FRM, hydrogen flow rate 57 FRM, powder feed rate 35 g/min, and spray distance 7 inch. Friction coefficients of the coating and the substrate decreased with an increasing sliding surface temperature from $25^{\circ}C$ to $450^{\circ}C$. The friction coefficient of Diamalloy-4006 coating decreased as the sliding surface temperature increased from $0.43{\pm}0.01$ at $25^{\circ}C$ to $0.29{\pm}0.01$ at $450^{\circ}C$. The wear trace and wear depth of the coating were smaller than the substrate at all temperatures tested. The relationship between spray parameters and wear resistance was discussed extensively, based on the measured roughness, hardness, and porosity in each coating.
Keywords
coating; high velocity oxy-fuel; spray parameter; wear property;
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