The Paton Welding Journal, 2008, №07

2008 №07 (03)

2008 №07 (05)

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The Paton Welding Journal, 2008, #7, 19-23 pages

Effect of zirconia on properties of slag in flux-cored wire submerged-arc surfacing using flux AN-348A

V.E. Sokolsky¹, A.S. Roik¹, V.P. Kazimirov¹, I.I. Ryabtsev², D.D. Mishchenko², I.A. Ryabtsev², A.S. Kotelchuk², V.S. Tokarev²

¹Taras Shevchenko Kiev National University, Kiev, Ukraine
²E.O. Paton Electric Welding Institute of the NASU. 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine.

Abstract
Effect of zirconia on slag properties in submerged-arc surfacing using low-alloy flux-cored wire PP-Np-20KhGS and flux AN-348A was investigated. It is established that, when depositing the first layers, zirconia is contained in the surface layer of the slag crust adjacent to the deposited metal in the form of individual inclusions of predominantly monoclinic shape. Formation of zirconia induces substantial microstresses in the slag crust and leads to its cracking, thus preventing chemical bonding of the crust and deposited metal through an interlayer of oxides and improving detachability of the slag crust.
Keywords: arc surfacing, submerged-arc surfacing, fluxcored wire, zirconia, detachability of slag crust, X-ray examinations

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Suggested Citation

V.E. Sokolsky, A.S. Roik, V.P. Kazimirov, I.I. Ryabtsev, D.D. Mishchenko, I.A. Ryabtsev, A.S. Kotelchuk, V.S. Tokarev (2008) Effect of zirconia on properties of slag in flux-cored wire submerged-arc surfacing using flux AN-348A. The Paton Welding J., 07, 19-23.

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