The Paton Welding Journal, 2014, №06



2014 №06 (24)

DOI of Article 10.15407/tpwj2014.06.25

2014 №06 (26)

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The Paton Welding Journal, 2014, #6-7, 115-123 pages  

INFLUENCE OF ACTIVE GAS CONTENT AND DISPERSE FILLER CONTINUITY ON THE PROCESS OF BEAD FORMATION IN MICROPLASMA POWDER SURFACING OF NICKEL SUPERALLOYS

K.A. YUSHCHENKO and A.V. YAROVITSYN

E.O. Paton Electric Welding Institute, NASU. 11 Bozhenko Str., 03680, Kiev, Ukraine. E-mail: office@paton.kiev.ua
 
 
Abstract
Features of deposited metal formation in microplasma powder surfacing of nickel superalloys, depending on presence of active gases in the filler powder, are considered. Conditions of sound formation of deposited metal and requirements to filler powders were established, proceeding from oxygen and nitrogen content. An interrelation between presence of micropores in deposited metal and their presence inside disperse powder particles is shown. A probable mechanism of microporosity formation, influence of technological parameters of the process on micropore quantity and size in deposited metal is described. 25 Ref., 2 Tables, 10 Figures.
 
 
Keywords: microplasma powder surfacing, nickel superalloys, deposited metal, filler powder, oxygen and nitrogen, microporosity of powder and deposited metal
 
 
Received:                30.04.14
Published:               28.09.14
 
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