Moscow Polytechnic University, Moscow, Russia

G. R. Latypova, Associate Professor of the Department of Equipment and Technology of Welding Production, Candidate of Technical Sciences, Associate Professor, e-mail: g.r.latypova@mospolytech.ru
R. А. Latypov, Professor of the Department of Equipment and Technolog of Welding Production, Doctor of Technical Sciences, Professor, e-mail: latipov46@mail.ru

М. Alsobh, Postgraduate Student of the Department of Equipment and Technology of Welding Production, e-mail: mohamadalsobh14.1@yahoo.com

Moscow Polytechnic University, Moscow, Russia¹ ; Wuhan Textile University, Wuhan, China² ; Zhejiang Wenyuan Intelligent Technology Co., Xinchang, China³
V. B. Deev^*, Head of the Department of Equipment and Technology of Welding Production¹, Professor of the Government Key Laboratory of Digital Textile Equipment of Hubei Province², Professor-Expert³, Doctor of Technical Sciences, Professor, e-mail: deev.vb@mail.ru

^*Corresponding author.

Some features of the coating formation and its connection with the base metal during the restoration of bronze parts by electrocontact welding of a metal woven gauze are considered. It is shown that there are no defects such as pores, cracks, poor welding fusion and discontinuities in the joint area of the coating made of a metal woven gauze made of St1kp steel with BrOCC5-5-5 bronze. There is an intermediate layer in the joint area itself, which is a solid solution of copper, tin, silicon and carbon of iron. It is shown that this intermediate layer with a width of less than 4.0 microns has been formed as a result of thediffu sion of elements that make up the combined metals. It is established that the maximum microhardness value of the coating is near the contact zone with the base metal equal to 320–330 MPa. Studies have shown that the impact strength of samples made of BrOCC5-5-5 bronze coated with a metal woven gauze is 4.3–5.1% higher than the impact strength of samples made of St1kp steel in as-received condition. When studying the joint area of the coating by computed tomography, defects in the form of cracks, delaminations, shells, and pore clusters have not been detected. It has also been found that the thickness of the coating varies between 0.31–0.34 mm, which confirms the data of metallographic studies.

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