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Materials 2018, 11(1), 88; https://doi.org/10.3390/ma11010088

Contact Behavior of Composite CrTiSiN Coated Dies in Compressing of Mg Alloy Sheets under High Pressure

1
Department of Mechanical and Computer Aided Engineering, National Formosa University, Yunlin 632, Taiwan
2
Chang Jung Christian University, Tainan 71101, Taiwan
*
Author to whom correspondence should be addressed.
Received: 9 October 2017 / Revised: 14 December 2017 / Accepted: 2 January 2018 / Published: 8 January 2018
(This article belongs to the Special Issue Selected Papers from IMETI2016)
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Abstract

Hard coatings have been adopted in cutting and forming applications for nearly two decades. The major purpose of using hard coatings is to reduce the friction coefficient between contact surfaces, to increase strength, toughness and anti-wear performance of working tools and molds, and then to obtain a smooth work surface and an increase in service life of tools and molds. In this report, we deposited a composite CrTiSiN hard coating, and a traditional single-layered TiAlN coating as a reference. Then, the coatings were comparatively studied by a series of tests. A field emission SEM was used to characterize the microstructure. Hardness was measured using a nano-indentation tester. Adhesion of coatings was evaluated using a Rockwell C hardness indentation tester. A pin-on-disk wear tester with WC balls as sliding counterparts was used to determine the wear properties. A self-designed compression and friction tester, by combining a Universal Testing Machine and a wear tester, was used to evaluate the contact behavior of composite CrTiSiN coated dies in compressing of Mg alloy sheets under high pressure. The results indicated that the hardness of composite CrTiSiN coating was lower than that of the TiAlN coating. However, the CrTiSiN coating showed better anti-wear performance. The CrTiSiN coated dies achieved smooth surfaces on the Mg alloy sheet in the compressing test and lower friction coefficient in the friction test, as compared with the TiAlN coating. View Full-Text
Keywords: CrTiSiN coating; Mg alloy; cathodic arc deposition process; wear test; compression; friction test CrTiSiN coating; Mg alloy; cathodic arc deposition process; wear test; compression; friction test
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Yang, T.; Yao, S.; Chang, Y.; Deng, J. Contact Behavior of Composite CrTiSiN Coated Dies in Compressing of Mg Alloy Sheets under High Pressure. Materials 2018, 11, 88.

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