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Production of filler rods for repair welding of ML12 (ZK51) magnesium alloy castings

https://doi.org/10.17073/0021-3438-2022-3-47-56

Abstract

   In magnesium alloys castings, the casting defects such as shrinkage porosity are often occur. Such defects can be suppressed by repair welding or surfacing using a special filler rod. Unfortunately, in Russia, the low amount of filler rod is consumed. Therefore, native enterprises do not manufacture it, limiting themselves to imports or homemade low-quality substitutes. Nevertheless, there is a need for filler rod, and recently it has become unprofitable to replace them with imported materials due to a significantly increased price. Therefore, there is a need to study the technology of its production to replace imported filler rod with native material. Magnesium alloys based on the Mg–Zn–Zr (La, Nd) system: SV1, SV122, and ML12 (ZK51) that used as a filler rod for repair welding of ZK51 alloy castings were studied in this work. The samples were obtained by permanent mold casting into aluminum molds followed by hot extrusion into a filler rod with a diameter of 4 mm. It was shown that all the investigated alloys could be obtained in the form of a rod with a diameter of 4 mm. Therefore, the investigated rod samples from the SV122 alloy were used as filler material for repair welding of ZK51 magnesium alloy castings. The weld seam in the T1 condition has an ultimate tensile strength (UTS) about 80 % of the UTS of the casting material.

About the Authors

A. V. Koltygin
National University of Science and Technology «MISIS» (NUST «MISIS»)
Russian Federation

Candidate of Technical Sciences, Associate Professor

Department of Foundry technologies and artistic processing of materials

119991

Leninsky Ave., 4

Moscow



V. E. Bazhenov
National University of Science and Technology «MISIS» (NUST «MISIS»)
Russian Federation

Candidate of Technical Sciences, Associate Professor

Department of Foundry technologies and artistic processing of materials

Moscow



S. A. Tavolzhanskii
National University of Science and Technology «MISIS» (NUST «MISIS»)
Russian Federation

Candidate of Technical Sciences, Associate Professor

Department of Foundry technologies and artistic processing of materials

Moscow



S. V. Matveev
National University of Science and Technology «MISIS» (NUST «MISIS»)
Russian Federation

Candidate of Technical Sciences, Head of the Department

Department of the Engineering Center "Foundry technologies and materials"

Moscow



I. V. Plisetskaya
National University of Science and Technology «MISIS» (NUST «MISIS»)
Russian Federation

Candidate of Technical Sciences, senior lecturer

Department of the Engineering Center "Foundry technologies and materials"

Moscow



M. V. Belov
National University of Science and Technology «MISIS» (NUST «MISIS»)
Russian Federation

Candidate of Technical Sciences, Deputy Director

Moscow



A. V. Samokhin
National University of Science and Technology «MISIS» (NUST «MISIS»)
Russian Federation

shop manager

Moscow



V. D. Belov
National University of Science and Technology «MISIS» (NUST «MISIS»)
Russian Federation

Doctor of Technical Sciences, Head of the Department

Department of Foundry technologies and artistic processing of materials

Moscow



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Review

For citations:


Koltygin A.V., Bazhenov V.E., Tavolzhanskii S.A., Matveev S.V., Plisetskaya I.V., Belov M.V., Samokhin A.V., Belov V.D. Production of filler rods for repair welding of ML12 (ZK51) magnesium alloy castings. Izvestiya. Non-Ferrous Metallurgy. 2022;(3):47-56. (In Russ.) https://doi.org/10.17073/0021-3438-2022-3-47-56

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