Sliding behavior and wear mechanism of iron and cobalt-based high-temperature alloys against WC and SiC balls |
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| Affiliation: | 1. Centre for Advanced Jet Engineering Technologies (CaJET), School of Mechanical Engineering, Shandong University, Jinan 250061, PR China;2. Key Laboratory of High Efficiency and Clean Mechanical Manufacture (Shandong University), Ministry of Education, PR China.;1. Department of Chemical and Materials Engineering, The University of Auckland, Auckland, New Zealand;2. Fraunhofer-Institut für Keramische Technologien und Systeme, Winterbergstr. 28, D-01277 Dresden, Germany;1. School of Materials Science and Engineering, Xi''an University of Technology, Xi''an 710048, China;2. Shaanxi Province Key Laboratory of Electrical Materials and Infiltration Technology, Xi''an University of Technology, Xi''an 710048, China;1. State Key Laboratory of Ultra-precision Machining Technology, The Hong Kong Polytechnic University, Hong Kong;2. Centre for Precision Engineering, School of Mechatronics Engineering, Harbin Institute of Technology, Harbin 150001, China;1. Dipartimento di Scienze e Tecnologie Chimiche, Università di Roma “Tor Vergata”, Via della Ricerca Scientifica 1, 00133 Roma, Italy;2. Fabbrica Italiana Leghe Metalliche Sinterizzate (F.I.L.M.S.) SpA, Via Megolo 49, 28877 Anzola D''Ossola, VB, Italy;3. Istituto di Struttura della Materia (ISM), Unit of Montelibretti, Consiglio Nazionale delle Ricerche (CNR), Via Salaria km 29.300, 00015 Monterotondo Scalo, Roma, Italy |
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| Abstract: | The sliding behaviors of two typical high-temperature alloys of GH2132 and GH605 against WC and SiC balls were investigated at environments from room temperature to 800 °C with a sliding speed of 50 to 125 m/min under a load of 10 to 20 N. The wear performances of high-temperature alloys, WC and SiC balls were rated and their mechanisms were discussed. The four sliding pairs exhibited the markedly different sliding behaviours, in which the GH2132/WC sliding pair had the maximum friction coefficient with 125 m/min under 10 N at room temperature. The variation trends of ball wear rates with the ambient temperature were at odds with those of friction coefficient. The higher friction coefficient did not always lead balls to suffer from the higher wear rate. The maximum worn depth approximated to 250 μm for the GH2132/WC sliding pair with higher friction coefficient. The GH605/WC sliding pair exhibited the lower friction coefficient and lower worn depth of plate. Whether at room temperature or high temperature, the GH605/SiC sliding pair significantly exhibited good wear resistance with a minor damage of ball and plate despite of its higher friction coefficient. |
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