Abstract
In order to enhance the tribological performance of YT14 carbide, pure Zr coating was deposited on the substrate surface using a multi-arc ion plating method. The surface topography, adhesion strength, thickness, and micro-hardness of the Zr coating were tested. Dry sliding friction experiments against a 40Cr hardened steel ring were conducted with Zr-coated carbides and traditional ones. The average coefficients of friction were measured and compared. The wear characteristics of the samples were examined by scanning electron microscope (SEM) and energy dispersive X-ray analysis (EDX). The test results indicated that the Zr coating deposited on the carbide surface exhibited excellent adhesive strength and lower hardness. The average friction coefficient of Zr coated carbide decreased by 20%–30% in comparison with that of the uncoated one. The Zr coated carbide could reduce the adhesive wear compared with the uncoated one, and the main tribological degradation mechanisms of the coating were abrasive wear, coating flaking and delamination.
Highlights
Cemented carbide has been widely applied in engineering productions due to the advantages of high strength, and excellent anti-wear properties [1]
The Zr-coated sample was mounted in a holder, while the 40Cr ring performance and properties of the pure Zr coating, measurements were executed via scanning electron microscope (SEM)
Discussion and properties the pure Zr coating, measurements were executed via SEM (INCA Penta FETXS, Oxford Instruments, Abingdon, UK) and energy dispersive X-ray analysis (EDX) (D8 ADVANCE, Bruker, Karlsruhe, Germany)
Summary
Cemented carbide has been widely applied in engineering productions due to the advantages of high strength, and excellent anti-wear properties [1]. Better excellent abrasion resistance, and high-temperature stability, hard coatings are applied to improve wear resistance and enhance the tribological performance of substrate materials. The multi-component composite coatings exhibit much higher hardness and better tribological properties than binary coatings, and the addition of metal during deposition process produces much more stable substitution solid solutions. To further enhance the wear resistance and service life of sulfide coatings, the combination of sulfides and metals such as Ti, Cr, or Zr have been found to significantly promote mechanical properties and tribological performance [26,27,28,29,30,31,32,33,34,35], and have been widely used in industrial productions. The friction characteristics of the Zr coated carbides against hardened steel were investigated
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