International Journal of Advances in Engineering & Technology, Dec., 2015. ©IJAET ISSN: 22311963 976 Vol. 8, Issue 6, pp. 976-983 APPLICATION OF TAGUCHI METHOD FOR OPTIMIZATION OF ABRASIVE WEAR CHARACTERISTICS OF TUNGSTEN CARBIDE-COBALT AND NICKEL-CHROMIUM BASED COATING ON HIGH SPEED STEEL DEPOSITED BY DETONATION GUN PROCESS Prashant Badoni 1 , Amit Joshi 2 1 Mechanical Engineering Department, Graphic Era University, Dehradun, India 2 Department of Metallurgical and Materials Engineering, IIT Roorkee, India ABSTRACT Abrasive wear is a vital property which plays key role in the life and working of a material. In modern age of industrial development, it becomes essential to study the amount of wear a component suffers during operation at varying conditions. This paper is based on the abrasive wear characteristics of High speed steel (HSS) which has coating of Tungsten Carbide-Cobalt (WC-Co) and Nickel-Chromium (NiCr), deposited by detonation gun process. Coating has an effect on the abrasion wear behaviour of the material. The present work describes the effect of WC-Co and NiCr based coating on the HSS specimen at varying condition of loading (normal load), velocity and composition of the coating. Then the systemic properties are optimized through the Taguchi method of optimization. KEYWORDS: Abrasive Wear, Thermal Spraying, Coating, Detonation Gun Process, Taguchi Method. I. INTRODUCTION High speed steel (HSS) is a subset of tool steels, typically utilized as cutting tools and tool bits. The life of high-speed steel can be protracted by coating the tool. A coating provides the cleanly passage to the cutting edge of a tool through the material without having material nerve to it. It helps to reduce the temperature associated with the cutting process and expand the tool life. Thermal spraying is an effective and inexpensive mode to apply thick coatings to advance surface properties of the component. Coating materials available for thermal spraying are fed in wire or powder form, heated to a molten or semi molten state and moved towards substrates in the form of micrometer-size particles. Electrical arc discharge or combustion is normally used as the source of energy for thermal spraying. Among the commercially available methods, High Velocity Oxy Fuel (HVOF) and Detonation Spray (DS) are the prominent thermal spray coating techniques to get hard, dense and wear resistant coatings as desired [1]. In this work, detonation gun spray is used for coating to enhance the properties of surface of substrate. The present study aim at the studying the wear behaviour of high speed steel coating of Tungsten Carbide-Cobalt (WC-Co) and Nickel-Chromium (NiCr) [5-11] at various levels of normal load and speed applied on the testing machine using Taguchi method [12] [13]. Moreover, the analysis of variance (ANOVA) [14] is done to identify the most significant control factor and their interactions. This paper is organized as follows: Section II provides the details of experiments executed in the current study. Section III describes the test apparatus used. In Section IV design of experiment is expressed. Section V gives results and a discussion. Conclusion and future work has been presented in Section VI and VII respectively.