Manufacturing Technology 2021, 21(1):3-13 | DOI: 10.21062/mft.2021.012

Experimental study of thin steel tubes welded by fiber laser

Dana Bako¹ová, Al¾beta Bako¹ová
Faculty of Industrial Technologies in Púchov, Alexander Dubèek University of Trenèín. I. Krasku 491/30, 020 01 Púchov. Slovakia

The laser welding method is one of the youngest but the most progressive welding methods. The advantages of laser welding include: simple automation combined with modern computer technolo-gy, very low heat input to the weld, high productivity, high welding accuracy and low noise during laser operation. In this work, the sample meltings were prepared in a protective atmosphere varying the welding parameters – laser power, welding speed, or focus position. A total of 12 samples were prepared this way. The aim was to evaluate the shape and depth of the melting of the material for selected values of parameters. Based on this metallographic evaluation, the optimal welding parame-ters were selected for a pair of austenitic stainless steel tubes (X2CrNi19-11 and X5CrNiMo17-12-2) for fiber laser welding. Macrostructure and microstructure evaluations, microhardness tests and tensile tests were performed on these welded samples.

Keywords: steel, fiber laser, microhardness, weld, metallography
Grants and funding:

Slovak grant project No. KEGA 002TnUAD – 4/2019. This publication was created in the frame of the project: Advancement and support of R&D for “Centre for diagnostics and quality testing of materials“ in the domains of the RIS3 SK specialization, ITMS2014+:313011W442, based on the Operational Programme Integrated Infrastructure and funded from the European Regional Development Fund.

Received: October 7, 2020; Revised: December 24, 2020; Accepted: January 14, 2021; Prepublished online: February 10, 2021; Published: February 24, 2021  Show citation

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Bako¹ová D, Bako¹ová A. Experimental study of thin steel tubes welded by fiber laser. Manufacturing Technology. 2021;21(1):3-13. doi: 10.21062/mft.2021.012.
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