Specification for resistance spot welding of uncoated and coated low carbon steel

2014 ◽  
Vol 875-877 ◽  
pp. 1499-1502 ◽  
Author(s):  
Ladislav Kolařík ◽  
Miroslav Sahul ◽  
Marie Kolaříková ◽  
Martin Sahul ◽  
Milan Turňa

The contribution deals with resistance spot welding of low carbon steel to austenitic CrNi stainless steel. The thickness of welded dissimilar steels was 2 mm. DeltaSpot welding gun with process tape was utilized for welding of the above-mentioned combination of steels. Resistance spot welds were produced under different welding currents. The welding currents used were 7 kA, 7.5 kA and 8 kA, respectively. Optical microscopy, microhardness measurement across the weld joint and EDX analysis across the weld joint interface were used to evaluate the quality of resistance spot welds of dissimilar steels.


Author(s):  
Mohammad Jameel Zedan ◽  
Qasim M. Doos

The resistance spot welding is adopted to joint dissimilar alloys such as aluminum alloy 5052, and low carbon steel alloy 1008. In this work, the electrodes force 2100-2700 N, the welding current 7.5-10.5 KA, and welding time 10-20 cycle have been used. The relationships between the three parameters have been studied. The maximum tensile shear load of the aluminum alloy 5052-low carbon steel 1008 joint has been found equal to 2860 N for weld nugget diameter of 9 mm. The intermetallic compound layer (IMC) with 2-8 μm thickness with tongue-like has been appeared adjacent to the 1008 low carbon steel side, whereas a needle-shaped IMC layer adjacent to the aluminum alloy 5052 side


2011 ◽  
Vol 189-193 ◽  
pp. 3534-3540 ◽  
Author(s):  
Ran Feng Qiu ◽  
Hua Yu ◽  
Hong Xin Shi ◽  
Ke Ke Zhang ◽  
Chihiro Iwamoto ◽  
...  

Aluminum alloy A5052 and low-carbon steel (SPCC) was welded using resistance spot welding with a cover plate. The interfacial microstructure was observed using electron microscopy. A thick two-layered reaction layer contains Fe2Al5 and FeAl3was observed at the welding interface, respectively. Mechanical property analysis suggested that the reaction layer has no effect on the tensile shear strength of the A5052/SPCC joint and affects the cross tension strength of the joint.


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