Version 1
: Received: 7 December 2022 / Approved: 7 December 2022 / Online: 7 December 2022 (06:35:32 CET)
Version 2
: Received: 14 December 2022 / Approved: 15 December 2022 / Online: 15 December 2022 (04:18:31 CET)
Zhao, D.; Vdonin, N.; Bezgans, Y.; Radionova, L.; Glebov, L. Correlating Electrode Degradation with Weldability of Galvanized BH 220 Steel during the Electrode Failure Process of Resistance Spot Welding. Crystals2023, 13, 39.
Zhao, D.; Vdonin, N.; Bezgans, Y.; Radionova, L.; Glebov, L. Correlating Electrode Degradation with Weldability of Galvanized BH 220 Steel during the Electrode Failure Process of Resistance Spot Welding. Crystals 2023, 13, 39.
Zhao, D.; Vdonin, N.; Bezgans, Y.; Radionova, L.; Glebov, L. Correlating Electrode Degradation with Weldability of Galvanized BH 220 Steel during the Electrode Failure Process of Resistance Spot Welding. Crystals2023, 13, 39.
Zhao, D.; Vdonin, N.; Bezgans, Y.; Radionova, L.; Glebov, L. Correlating Electrode Degradation with Weldability of Galvanized BH 220 Steel during the Electrode Failure Process of Resistance Spot Welding. Crystals 2023, 13, 39.
Abstract
Electrode degradation in continuous resistance spot welding of BH 220 steel was evaluated by electrode life test, and weldability tests were conducted by measuring the geometric features, mechanical property analysis, and measuring electrode diameter with 88 or 176 weld intervals. The analysis of weld geometries shows that the HAZ width, nugget diameter, and nugget area tend to decrease rapidly, while the nugget height tends to firstly increase with the weld repetitions till the welding heat input becomes too small to form the valid nugget. The peak load showed a rapid downward trend, while failure energy and maximum displacement slightly increases till the 176th weld and then decreases. The cavities and pores in the nugget mainly appeared after the 176th spot weld. The electrode diameter increases during welding. The reason for the increase in electrode diameter may be that the contact area between the electrode and BH 220 steel sheets becomes smaller in the welding process, which causes the continuous sticking phenomenon between the electrode and the BH 220 steel sheets. In the absence of alloying, the edge of the electrode is geometrically deformed due to the deformation of the electrode, while Cu-Zn-Fe alloying occurs in the area in contact with the BH 220 steel sheet.
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
