The Paton Welding Journal, 2004, №05

2004 №05 (05)

2004 №05 (07)

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The Paton Welding Journal, 2004, #5, 21-25 pages

Structure and mechanical properties of welded joints made under the water with flux-cored wires

V.Ya. Kononenko, A.O. Korsun

«Ekotekhnologiya», Kiev, Ukraine

Abstract
Effect of the content of nickel on mechanical properties of the joints produced by wet underwater welding using self-shielded flux-cored wires has been studied. It is found that nickel additives improve the mechanical properties of weld metal. Investigations of the composition of non-metallic inclusions proved the absence of adhesion between the inclusion and matrix in some of them. This is related to increase in the concentration of hydrogen accumulated at the non-metallic inclusion-matrix interface during the structure formation process. Presence of such "traps" may decrease the rate of hydrogen mass transfer in underwater welding. It has been found that a mixed ferrite structure of the weld metal characterized by chemical heterogeneity is formed at a nickel content above 1.2 wt.%.
Keywords: wet welding, flux-cored wires, mechanical properties, non-metallic inclusions, weld metal structure

References

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Suggested Citation

V.Ya. Kononenko, A.O. Korsun (2004) Structure and mechanical properties of welded joints made under the water with flux-cored wires. The Paton Welding J., 05, 21-25.

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