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2013 №08 (07) 2013 №08 (09)

The Paton Welding Journal 2013 #08
TPWJ, 2013, #8, 46-48 pages  
ELECTROSLAG SURFACING OF PARTS, MADE OF HIGH-CHROME CAST IRON, USING CAST IRON SHOT

Journal                    The Paton Welding Journal
Publisher                 International Association «Welding»
ISSN                       0957-798X (print)
Issue                       № 8, 2013 (August)
Pages                      46-48
 
 
Authors
Yu.M. KUSKOV, I.L. BOGAJCHUK, Ya.P. CHERNYAK and A.I. EVDOKIMOV
E.O. Paton Electric Welding Institute, NASU. 11 Bozhenko Str., 03680, Kiev, Ukraine. E-mail: office@paton.kiev.ua
 
 
Abstract
A lot of parts, used in machine building, metallurgy, mining and other industry branches and subjected to different types of wear in service, are manufactured of high-chrome cast irons. After base service the worn-out parts of this type are not subjected to restoration in practice by the known methods of arc surfacing. The present work deals with the possibility of restoration of worn-out parts, manufactured of high-chrome cast iron, using the technology of electroslag surfacing, developed at the E.O. Paton Electric Welding Institute. The peculiar feature of this technology is the application of a special device in surfacing, namely a current-carrying mould, allowing surfacing using a discrete filler material (shot). Here, the capability of «soft» and uniform heating of surface and layer being deposited by a slag, typical of various known methods of electroslag surfacing, the present technology provides a feasibility to produce a fine-grain deposited metal. This contributes to restoration of parts providing high service characteristics. Using the present technology, the experimental restoration electroslag surfacing of high-chrome cast iron layer on worn-out zones of plates of chamber of shotblast unit of «Bduhuis» company and blades of shotblast unit of «Carlo Banfi» company, made of high-chrome cast iron, were carried out. As a surfacing filler material the shot was used of the following chemical composition, wt.%: 2.5 C, 26.2 Cr, 0.7 Si, 0.7 Mn, 1.3 Ni, 0.9 Mo. It was found that the technology of electroslag surfacing using discrete surfacing materials in the form of shot of high-chrome cast iron allows manufacturing quality bimetal products with an optimum combination of deposited metal of high-hard carbides and ductile matrix in the structure. 5 Ref., 5Figures.
 
 
Keywords: high-chrome cast iron, electroslag surfacing, surfacing shot, deposited metal
 
 
Received:                15.05.13
Published:               28.08.13
 
 
References
1. (1969) Materials in machine building: Refer. Book. Vol. 4: Cast iron. Ed. by I.V. Kudryavtsev, A.A. Zhukov, A.D. Sherman. Moscow: Mashinostroenie.
2. Garber, M.E. (1972) Cast products from white wear-resistant cast iron. Moscow: Mashinostroenie.
3. Tsypin, I.I. (1983) White wear-resistant cast irons. Structure and properties. Moscow: Metallurgiya.
4. Kuskov, Yu.M., Sarychev, I.S. (2004) Reduction electroslag surfacing of cast iron cylinders of mill 2000. Svarochn. Proizvodstvo, 1, 39-43.
5. Kuskov, Yu.M. (2001) Electroslag refining of different production waste using nonconsumable water-cooled electrode. Elektrometallurgiya, 2, 24-28.