From: Effects of Cover Sheets on the Nugget Growth and Fracture Behavior of Resistance Spot Welded Q&P980 Steel Joints
Welding parameter
Experimental condition
Number of welding pulses
3
Cooling time between pulses
20 ms
Welding time per pulse
120 ms
Electrode force
4.5 kN
Holding time
250 ms
Welding current
5.5 kA - expulsion (0.5 kA interval)