RT Journal Article
SR Electronic
A1 Sejč, Pavol
A1 Jaško, Peter
A1 Baksa, Peter
A1 Belanová, Judita
T1 Stability of Ni / TiB2 Coating on CuCrZr Electrodes for Resistance Spot Welding Galvanized Steel Sheet
JF Manufacturing Technology Journal
YR 2017
VO 17
IS 4
SP 570
OP 576
DO 10.21062/ujep/x.2017/a/1213-2489/MT/17/4/570
UL https://journalmt.com/artkey/mft-201704-0028.php
AB Under the influence of heat load and Zn diffusion in resistance spot welding of galvanized steel sheets, significant changes occur on the contact area of CuCrZr welding electrodes which lead to their erosion damage. Changes, causing wear of electrodes not only affect the welding process but also the quality and properties of the weld. Apart from the traditional solution (for example, the so-called "Slope" welding current) the wear of the contact surfaces can be affected by using the barrier layers - coatings. Main goal for the use of material barrier is to minimize the structural changes caused by Zn diffusion, erosion and higher heat resistance of the electrode. Recent studies have shown that such a suitable coating is a multilayer system (Ni/TiB2).This paper is focused on the assessment of changes in the contact area of the electrodes and the barrier layer Ni / TiB2 after compila-tion 0, 1, 5, 20 and 100 welds on galvanized steel sheets type HX220BD Z100MBO.