2017 №01 (12) DOI of Article
2017 №01 (01)

Automatic Welding 2017 #01
Avtomaticheskaya Svarka (Automatic Welding), #1, 2017, pp. 14-18
Computation and experimental evaluation of formation of primary structure in weld metal with refractory inoculants

D.Yu. Ermolenko and V.V. Golovko
E.O. Paton Electric Welding Institute, NASU 11 Kazimir Malevich Str., 03680, Kiev, Ukraine. E-mail: office@paton.kiev.ua
Possibility of regulation of structure and properties of weld metal of high-strength low-alloy steels was considered. It can be done with the help of introduction in a weld pool of the disperse refractory inoculants as surface-active elements. A procedure was described for performance of the experiments on introduction of the different refractory inoculants (TiC, TiN, SiC, TiO2, Al2O3, Zr2O, MgO) in the weld pool in high-strength low-alloy steel welding. The results of investigation of effect of the introduced inoculants on primary structure parameters and main mechanical properties of investigated weld metal are given. A model of interaction of refractory inoculants with solidification front was briefly discussed. Parameters of primary weld metal structure with the refractory inoculants, which were received by means of experimental investigations and computation experiment, were compared. The results of this comparison showed adequacy of a proposed model of interaction of refractory inoculant with solidification front. 9 Ref., 2 Tables, 7 Figures.
Keywords: arc welding, high-strength low-alloy steels, dendrite structure, primary structure, disperse refractory inoculants, solidification
Received:                19.10.16
Published:               16.02.17
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