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2014 №11 (04) DOI of Article
10.15407/tpwj2014.11.05
2014 №11 (06)

The Paton Welding Journal 2014 #11
The Paton Welding Journal, 2014, #11, 28-31 pages  

INVESTIGATION OF WEAR RESISTANCE OF COMPOSITE ALLOYS UNDER THE CONDITIONS OF GAS-ABRASIVE WEAR AT ELEVATED TEMPERATURES

A.P. ZHUDRA


E.O. Paton Electric Welding Institute, NASU. 11 Bozhenko Str., 03680, Kiev, Ukraine. E-mail: office@paton.kiev.ua
 
 
Abstract
Given are the results of laboratory investigations of wear resistance of composite alloys, based on fused tungsten carbides WC + W2C (relite), under conditions of gas-abrasive wear. Given is the technical characteristic of laboratory stand OB-876Ts for tests of deposited metal for gas-abrasive wear. The scheme of tests was developed, maximum corresponding to real conditions of service of parts during the effect of abrasive flow within the temperature range of 25-450 °C. It was established that wear of composite alloys bears a selective, cyclic character and does not essentially depend on properties and hardness of matrix at small attack angles. The application of tungsten carbide with spherical granules increases wear resistance of composite alloy, and the increase in temperature up to 400 °C considerably decreases it due to oxidation of carbide component of alloys. At room temperature the wear resistance of composite alloy 2.7 times exceeds the wear resistance of nickel carbide chromium alloy. 9 Ref., 3 Tables, 3 Figures.
 
 
Keywords: gas-abrasive wear, composite alloys, fused tungsten carbide, spherical granules, matrix, microhardness, plasma-powder surfacing, relative wear resistance, test stand
 
 
Received:                01.10.14
Published:               28.11.14
 
 
References
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8. Dzykovich, V.I., Zhudra, A.P., Bely, A.I. (2010) Properties of tungsten carbide powders produced by different technologies. Ibid., 4, 22-24.
9. Bely, A.I. (2010) Wear resistance and strength of tungsten carbides WC-W2C produced by different methods. Ibid., 12, 15-17.