The Paton Welding Journal, 2014, №06



2014 №06 (17)

DOI of Article 10.15407/tpwj2014.06.18

2014 №06 (19)

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The Paton Welding Journal, 2014, #6-7, 87-91 pages  

FLUX FOR ELECTRIC ARC SURFACING PROVIDING HIGH-TEMPERATURE REMOVAL OF SLAG COATING

N.M. STRELENKO¹, L.A. ZHDANOV¹ and I.A. GONCHAROV²

¹NTUU «Kiev Polytechnic Institute». 37 Pobeda Ave., 03056, Kiev, Ukraine. E-mail:strelenkon@gmail.com
²E.O. Paton Electric Welding Institute, NASU. 11 Bozhenko Str., 03680, Kiev, Ukraine. E-mail: office@paton.kiev.ua
 
 
Abstract
It was shown as a result of analysis of mechanisms of slag crust removal from the weld metal surface that the spinels at slag-metal interface and their intergrowth have the main influence on this process. It was found on the basis of analysis of structure of spinels and slag melt that to prevent the formation of spinels at the interface and intergrowth of metal and slag, it is necessary to provide the presence in the slag melt of a structural element with configuration of a linked structure, differed from tetra- and octahedral structures, and not capable to formation of spinels. It was established that prevention of formation of spinels in providing necessary welding-technological properties of flux of SiO₂-Al₂O₃-MgO-CaF₂ system can be attained at adding of zirconium oxide in the amount of 3.5-5.5 % into flux composition. The flux has been developed, which provides a spontaneous removal of slag coating at high temperatures. 13 Ref., 6 Figures.
 
 
Keywords: submerged arc surfacing, high-temperature removal of slag coating, metal-slag interface, complex compounds of oxides, spinels, zirconium oxide, slag systems
 
 
Received:                29.04.14
Published:               28.09.14
 
References
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