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Effect of the Chemi¬cal Composition of Electrode Materials and Deposition Conditions on the Properties of Spark-Deposited Coatings.
II. Coating Hardness and Wear Resistance.

V.Konoval,
 
O.Umanskyi,
 
A.Kostenko,
 
I.Martseniuk
 

I. M. Frantsevich Institute for Problems of Materials Science of the NAS of Ukraine, Omeliana Pritsaka str.,3, Kyiv, 03142, Ukraine
Powder Metallurgy - Kiev: Frantsevich Institute for Problems of Materials Science NASU, 2014, #03/04
http://www.materials.kiev.ua/article/1210

Abstract

Electrospark coatings of cermet materials based on Ni–Al alloys and titanium–chromium diboride are deposited on 40Kh steel. The influence of the metal-to-refractory phase ratio in the electrode material and deposition conditions on the mechanical and tribotechnical characteristics of coatings is studied. It is established that the wear resistance and friction coefficients of the electrospark-deposited coatings depend on speed and loading. The cermet coatings show high tribotechnical characteristics (I = 1–5 µm/km, f = 0.2–0.25) at speed to 12 m/sec and loads to 4 MPa in dry friction conditions. These characteristics can be controlled by varying the electrode chemical composition and deposition conditions.


CERMETS, HARDNESS, SPARK-DEPOSITED COATING, TITANIUM–CHROMIUM DIBORIDE, WEAR RESISTANCE

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