The Influence of Nanosized Particles Introduced into Molten-Pool Tail on the Impact Toughness of Weld Metal


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This article discusses the possibility of introducing nanosized particles into a molten pool using a flux-cored wire. A flux-cored wire has been proposed with added composite granules obtained upon the combined treatment of nickel powder and nanosized particles. In order to avoid the overheating of particles, it has been proposed to add a flux-cored wire to a molten-pool tail using preheating. The following hardmelting particles have been tested: tungsten carbide (WC), titanium nitride (TiN), and aluminum oxide (Al2O3). It has been demonstrated that the addition of tungsten carbide to a molten pool improves the stability of weld-metal (WM) impact toughness while retaining its average value and the addition of aluminum oxide to a molten pool leads to increased average values of WM impact toughness while retaining its stability. Meanwhile, nanosized particles of titanium nitride in a molten pool are prone to dissociation, which leads to the formation of porosity, thus limiting the field of application of this modifier.

Sobre autores

N. Aleshin

Bauman State Technical University

Email: koberniknv@yandex.ru
Rússia, Moscow, 105005

A. Linnik

Bauman State Technical University

Email: koberniknv@yandex.ru
Rússia, Moscow, 105005

N. Kobernik

Bauman State Technical University

Autor responsável pela correspondência
Email: koberniknv@yandex.ru
Rússia, Moscow, 105005

R. Mikheev

Bauman State Technical University

Email: koberniknv@yandex.ru
Rússia, Moscow, 105005

A. Pankratov

“Welding and Testing” of MSTU n.a. Bauman

Email: koberniknv@yandex.ru
Rússia, Moscow, 105005

A. Samokhin

Baikov Institute of Metallurgy and Materials Science

Email: koberniknv@yandex.ru
Rússia, Moscow, 119334

N. Alekseev

Baikov Institute of Metallurgy and Materials Science

Email: koberniknv@yandex.ru
Rússia, Moscow, 119334

S. Shtokolov

OOO NIIMontazh

Email: koberniknv@yandex.ru
Rússia, Krasnodar, 350020

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