Table 2

Welding parameter − spot weld bonding of three-sheet steel stack-ups [7,9].

   Material Combination (I) Material Combination (II)

   Parameters (I) Parameters (II) Parameters (I) Parameters (II)
Squeeze time 1000 ms 1000 ms 1000 ms 1000 ms
Preheat pulse Current 7.8 kA 11.0 kA 5.5 kA
Preheat time 250 ms 30 ms 250 ms
Pause time 20 ms 20 ms 20 ms
Main pulse Current 8.05–9.05 kA 7.40–9.60 kA 6.00–7.15 kA 5.75–7.55 kA
Weld time 350 ms 350 ms 350 ms 350 ms
Hold time 300 ms 300 ms 300 ms 300 ms
Electrode force 2 kN 2 kN

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