Automatic Welding, 2016, №04



2016 №04 (06)

DOI of Article 10.15407/as2016.04.07

2016 №04 (01)

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Avtomaticheskaya Svarka (Automatic Welding), #4, 2016, pp. 58-64
 

Composition, structure and technology for production of electrode materials for electric spark restoration and strengthening of worn-out parts

A.V. Paustovsky, Yu.G. Tkachenko, R.A. Alfintseva, D.Z. Yurchenko and V.G. Khristov

I.M. Frantsevich Institute of Problems of Materials Science, NASU 3 Krzhizhanovsky Str., 03680, Kiev, Ukraine. Е-mail: tkachenko_yuri@ukr.net
 
 
Abstract
The electrode materials for producing electric spark coatings of Colmonoy–WC alloy containing 10–70 wt.% WC and hard alloys using TiC, Mo2C, TiN, Co, Cr, Ni, Al were developed. The phase composition, structure, mass transfer kinetics, hardness and wear resistance of electric spark coatings of the developed alloys were investigated. It was shown that in Colmonoy alloys, Colmonoy–10 % WC and Colmonoy–25 % WC the structure of eutectic character is observed. At pulse energy of 7.5 J the thickness of formed coatings amounted to 3–5 mm. The wear resistance of coatings Colmonoy–WC is 3.5 times higher than that of Colmonoy alloy coatings. It was found that the structure and composition of the developed electrode materials of TiC-based hard alloys allows producing electric spark coatings of up to 100 μm thickness and with hardness of up to 14 GPa. The developed electrode materials were applied under the industrial conditions for strengthening and restoration of worn-out parts of structural steels using electric spark method. 4 Ref., 3 Tables, 7 Figures.
 
Keywords: electric spark strengthening, electrode materials, restoration of parts, erosive properties, properties of coatings, wear resistance, heat resistance
 
 
 
Received: 25.12.2015
Published: 02.06.2016
 
 
References
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