The Paton Welding Journal, 2022, №05



2022 №05 (02)

DOI of Article 10.37434/tpwj2022.05.03

2022 №05 (04)

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The Paton Welding Journal, 2022, #5, 16-25 pages

Selection of parameters of laser welding of thin-walled items from light alloys with nonthrough thickness penetration

V.M. Korzhyk¹, V.Yu. Khaskin¹, S.I. Peleshenko², A.A. Grynyuk³, Dong Chunlin¹, E.V. Illyashenko², Yuhui Yao⁴

¹China-Ukraine Institute of Welding, Guangdong Academy of Sciences, Guangdong Provincial Key Laboratory of Advanced Welding Technology, Guangzhou, 510650, China
²E.O. Paton Electric Welding Institute of the NASU 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine
³National Technical University of Ukraine «Igor Sikorsky Kyiv Polytechnic Institute» 37 Peremohy Ave., 03056, Kyiv, Ukraine
⁴Shenzhen Hanzhizi Technology Co., Ltd. 6th Floor, Building B, Bantian International Center, 5 Huancheng South Road, Longgang District, Shenzhen, Guangdong, China

Abstract
Light metal alloys (in particular, beryllium and aluminium) are applied in different engineering fields, for instance for fabrication of rocket and aircraft elements. When designing such engineering elements, there is the need to produce welded joints with different types of welds. Laser welding with nonthrough thickness penetration welds can be used for item sealing, welding-on flanges and welding thin-walled structures of up to 2‒3 mm thickness. Toxic fumes form in welding beryllium alloys. Such a peculiarity requires reducing the number of technological experiments, aimed at selection of mode parameters. An up-to-date approach to solving the problem of light alloy welding is performance of preliminary calculated determination of mode parameters with their further experimental verification. Technological verification can be performed on high-strength aluminium alloys close by their physico-mechanical characteristics to beryllium alloys. Therefore, this work is devoted to preliminary determination of mode parameters of laser welding by a sealing weld with nonthrough thickness penetration of thin-walled flanges of cylindrical parts and box-shaped items from light metals and alloys based on Be and Al, taking into account the temperature of postweld heating. A procedure of preliminary calculated determination of mode parameters of laser welding of parts from a beryllium-based alloy is proposed in the work, which is suitable for both through-thickness and nonthrough-thickness penetration. Nonthrough-thickness penetration can be applied for welding-on flanges by a sealing weld. Experimental verification on samples from alloys of Al–Zn–Mg–Cu system and comparison with published data on beryllium alloy welding showed that the error of the proposed procedure is in the range of up to 15–20 %.
Keywords: laser welding, light alloys, penetration, mode parameters, error, pores, cracks

Received: 14.04.2022
Accepted: 08.08.2022

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