The Paton Welding Journal, 2011, №07



2011 №07 (02)

2011 №07 (04)

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The Paton Welding Journal, 2011, #7, 11-17 pages  

PECULIARITIES OF THE INFLUENCE OF COMPLEX ALLOYING ON STRUCTURE FORMATION AND MECHANICAL PROPERTIES OF WELDS ON LOW-ALLOYED HIGH-STRENGTH STEELS

V.V. GOLOVKO, V.A. KOSTIN and G.M. GRIGORENKO

E.O. Paton Electric Welding Institute, NASU, Kiev, Ukraine
 
 
Abstract
Influence of technological factors (oxygen potential of the flux, welding wire-base metal combination, and cooling rate) on mechanical properties of the studied welds on high-strength low-alloyed 12KhN2MDF and 09G2FB steels was analyzed. Derived results are in agreement with the type of microstructure, composition and distribution of non-metallic inclusions, and features of austenite decomposition in the studied weld metal. It is shown that addition of finely-dispersed refractory inclusions of titanium and zirconium oxides to the weld metal allows achievement of high values of strength (s_t == 700-710 MPa) and impact toughness (KCV_-20 = 80-100 J/cm²).
 
 
Keywords: arc welding, high-strength low-alloyed steels, ceramic flux, microstructure, austenite decomposition, acicular ferrite, nonmetallic inclusions, mechanical properties
 
 
Received:                ??.??.??
Published:               28.07.11
 
 
References
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Suggested Citation

V.V. GOLOVKO, V.A. KOSTIN and G.M. GRIGORENKO (2011) PECULIARITIES OF THE INFLUENCE OF COMPLEX ALLOYING ON STRUCTURE FORMATION AND MECHANICAL PROPERTIES OF WELDS ON LOW-ALLOYED HIGH-STRENGTH STEELS. The Paton Welding J., 07, 11-17.

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