The Paton Welding Journal, 2012, №06



2012 №06 (04)

2012 №06 (06)

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The Paton Welding Journal, 2012, #6, 19-21 pages  

MODIFICATION BY BORON OF DEPOSITED METAL OF WHITE CAST IRON TYPE

S.Yu. KRIVCHIKOV

E.O. Paton Electric Welding Institute, NASU, Kiev, Ukraine
 
 
Abstract
The paper considers the effect of minor additions of boron on properties of hypoeutectic composition deposited metal of the white cast iron type provided by wide-layer hardfacing using flux-cored wire. It has been established that boron in an amount of 0.07-0.14 wt.% leads to a substantial improvement of crack resistance of metal of the deposited cast iron. It has been shown that growth of crack resistance is caused by modifying effect of boron on sizes and structural constituents of the deposited cast iron and strengthening of grain boundaries.
 
 
Keywords: hardfacing, deposited cast iron, flux-cored wire, structure, boron modification and microalloying, crack resistance, hardness
 
 
Received:                01.03.12
Published:               28.06.12
 
 
References
1. Silman, G.I. (2007) Thermodynamics and thermokinetics of structure formation in cast irons and steels. Moscow: Mashinostroenie.
2. Goldshtejn, Ya.E., Mizin, V.G. (1986) Modification and microalloying of cast iron and steel. Moscow: Metallurgiya.
3. Weibull, W. (1964) Fatigue tests and analysis of their results. Moscow: Mashinostroenie.
4. Arkharov, V.I. (1975) Theory of microalloying of alloys. Moscow: Mashinostroenie.
5. Vinarov, S.M. (1961) Boron, calcium, niobium and zirconium in cast iron and steel. Moscow: Metallurgizdat.
6. Krivchikov, S.Yu. (2008) Improvement of tribotechnical characteristics of hardfaced cast iron automobile crankshafts. The Paton Welding J., 12, 31-33.

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