The Effects of Welding Processes and Microstructure on 3 Body Abrasive Wear Resistances for Hardfacing Deposits
Wear is the predominant factor that controls the life of any machine part. Hard facing helps to protect an area that is expected to wear with an alloy designed to combat the effects of the five main types of wear such as abrasion, impact, adhesion, high t
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Abstract Wear is the predominant factor that controls the life of any machine part. Hard facing helps to protect an area that is expected to wear with an alloy designed to combat the effects of the five main types of wear such as abrasion, impact, adhesion, high temperature and corrosion. Hardfacing is one of the most useful and economic ways to improve the performance of components submitted to severe wear conditions. A study was made to compare the microstructure and abrasion resistance of hardfacing alloys reinforced with primary chromium carbides. The hard facing alloys were deposited onto Mild steel plate by shielded metal arc welding (SMAW) process. Two different commercial hardfacing electrodes were employed to investigate the effect of the microstructure. The abrasion tests were carried out in a dry sand-rubber wheel abrasion machine according to the procedure A of ASTM G65 standard. Microstructure characterization and surface analysis were made using optical and scanning electron microscope. The result shows that the wear resistance is determined by the size, shape, distribution and chemical composition of the carbides as well as by the matrix microstructure. The best abrasion resistance was obtained in microstructure composed of chromium carbide alloy. Hardfacing is a deposition.
Keywords Abrasion resistance Chromium carbide Hardfacing alloy Microstructure characterization Wear mechanism Welding
K.M. Kenchi Reddy Department of Mechanical Engineering, Sri Krishna Institute of Technology, Bangalore, India e-mail: [email protected] C.T. Jayadeva (&) Department of Mechanical Engineering, Adichunchanagiri Institute of Technology, Chikmagalur, India e-mail: [email protected] © Springer Science+Business Media Singapore 2016 G.-C. Yang et al. (eds.), Transactions on Engineering Technologies, DOI 10.1007/978-981-10-0551-0_12
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K.M. Kenchi Reddy and C.T. Jayadeva
1 Introduction Hardfacing is also known as Hard surfacing, is the application of specialized alloys by means of welding process to resist abrasion, corrosion, high temperature or impact. Such an alloy may be deposited on the surface, an edge or merely the point of a part subject to wear. Hardfacing deposits can functionalize surfaces and reclaim components by extending their service life. Hardfacing is a key technology to fulfill these requirements and to apply different hardfacing alloys on the base metals. Hardfacing increases the service life of a part and thereby extend the lifetime of Machinery equipment efficiently. Core components such as crushers are exposed to heavy wear and require efficient surface protection measures to avoid costly downtimes and to reduce costs for expensive spare parts. Hardfacing is a commonly employed method to improve surface properties of agriculture tools, components for the mining operation, soil preparation equipments and earth moving equipments [1]. This process was also adopted across many industries such as Cement, Mining, Steel, Petrol-chemical, Power, Sugar cane, and Food. An all
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