Publikacje

Abstract:

This article presents the results of research on the technology and peripheral properties
of laser-welded micro-couplings. The aim of this research was to determine the characteristics
of properly made joints and to indicate the range of optimal parameters of the welding process.
Thin-walled AISI 316L steel pipes with diameters of 1.5 and 2 mm used in medical equipment were
tested. The micro-welding process was carried out on a SISMA LM-D210 Nd:YAG laser. The research
methods used were macroscopic and microscopic analyses of the samples, and assessment of the
distribution of elements in the weld, the distribution of microhardness and the tear strength of the
joint. As a result of the tests, the following welding parameters are recommended: a pulse energy of
2.05 J, pulse duration of 4 ms and frequency of 2 Hz, beam focusing to a diameter of 0.4 mm and a
rotation speed of 0.157 rad/s. In addition, the tests show good joint properties with a strength of
more than 75% of the thinner pipe, uniform distribution of alloying elements and a complex dendritic
structure characteristic of pulse welding.

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Technology and Properties of Peripheral Laser-Welded Micro-Joints