The Paton Welding Journal, 2011, №11



2011 №11 (03)

2011 №11 (05)

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The Paton Welding Journal, 2011, #11, 15-18 pages  

DEVELOPMENT OF FLUX-CORED WIRE FOR ARC WELDING OF HIGH-STRENGTH STEEL OF BAINITE CLASS

V.N. SHLEPAKOV, Yu.A. GAVRILYUK and S.M. NAUMEJKO

E.O. Paton Electric Welding Institute, NASU, Kiev, Ukraine
 
 
Abstract
Given are the results of investigation of the effect of alloying on formation of structure and mechanical properties of the weld metal in gas-shielded flux-cored wire welding, as well as of development of composition of a core of the wire providing the yield strength value of not less than 590 MPa and impact energy of more than 50 J at -50 °C. Optimal additional microalloying with zirconium was determined for the basic C-Si-Mn-Ni-Mo alloying system. This microalloying allows decreasing the volume fraction and size of non-metallic inclusions, as well as increasing the share of dispersed components in metal structure, and provides the required level of strength of the weld metal and its low-temperature tough-ductile properties.
 
 
Keywords: arc welding, low-alloy steel, flux-cored wires, properties of weld metal, structure, non-metallic inclusions, microalloying
 
 
Received:                ??.??.??
Published:               28.11.11
 
 
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