2018 №06 (01) DOI of Article
2018 №06 (03)

Automatic Welding 2018 #06
Avtomaticheskaya Svarka (Automatic Welding), # 6, 2018, pp. 12-23

Influence of liquid glass composition and properties on the strength of low-hydrogen electrode coatings

A. E. Marchenko1, V. V. Trachevskii2, N. V. Skorina1
1E.O.Paton Electric Welding Institute of the NAS of Ukraine. 11 Kazimir Malevich Str., 03150, Kyiv, Ukraine. E-mail: office@paton.kiev.ua
2Technical Center of NSU, 13 Pokrovskaya Str., 04070, Kyiv, Ukraine. E-mail: tracev@imp.kiev.ua

The paper presents the results of investigations of the strength of coatings of low-hydrogen electrodes, baked at 200, 300 and 400 °C, depending on the composition of liquid Li, Na and K-glasses, as well as their binary mixtures. Investigation results were interpreted from the viewpoint of evolution of silicon-oxygen structure of liquid glasses under the conditions of changing kind and ratio of cations-modifiers, as well as the level of water content, related to the parameters of electrode heat treatment. Diagnostics of structural-functional self-organization of silicon-oxygen anions (SOA) in the liquid glass composition was performed with application of the data of nuclear magnetic resonance (NMR). NMR29SI spectrum was used. The generalized results were considered in terms of dominance of polycondensation mechanism. A correlation was established between the values of coating strength and ratio of bridge Q4, Q3, Q2 and non-bridge Q1 connectivities in SOA structure. 8 Ref., 4 Tabl., 12 Fig.

Keywords: arc welding, welding electrodes, manufacturing technology, liquid glass, liquid glass structure, application of NMR spectroscopy method

Published: 29.05.2018
Received: 13.04.2018

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