Development of Complex Spot Welding Technologies for Automotive DP Steels with FEM Support

2017 ◽  
pp. 407-423 ◽  
Author(s):  
László Prém ◽  
Zoltán Bézi ◽  
András Balogh
Keyword(s):  
Spot Welding ◽  
Dp Steels

Microstructure of resistance spot welding of maraging steels

1990 ◽  
Vol 48 (4) ◽  
pp. 900-901
Author(s):  
I. Neuman ◽  
S.F. Dirnfeld ◽  
I. Minkoff
Keyword(s):  
Maraging Steel ◽  
Spot Welding ◽  
Lath Martensite ◽  
Base Material ◽  
Aging Treatment ◽  
High Strength ◽  
Maraging Steels ◽  
Heat Treated ◽  
Current Cycle ◽  
Welding Processes

Experimental work on the spot welding of Maraging Steels revealed a surprisingly low level of strength - both in the as welded and in aged conditions. This appeared unusual since in the welding of these materials by other welding processes (TIG,MIG) the strength level is almost that of the base material. The maraging steel C250 investigated had the composition: 18wt%Ni, 8wt%Co, 5wt%Mo and additions of Al and Ti. It has a nominal tensile strength of 250 KSI. The heat treated structure of maraging steel is lath martensite the final high strength is reached by aging treatment at 485°C for 3-4 hours. During the aging process precipitation takes place of Ni3Mo and Ni3Ti and an ordered solid solution containing Co is formed.Three types of spot welding cycles were investigated: multi-pulse current cycle, bi-pulse cycle and single pulsle cycle. TIG welded samples were also tested for comparison.The microstructure investigations were carried out by SEM and EDS as well as by fractography. For multicycle spot welded maraging C250 (without aging), the dendrites start from the fusion line towards the nugget centre with an epitaxial growth region of various widths, as seen in Figure 1.

Discussion on “Spot welding” at the London Section of the Institution

1939 ◽  
Vol 18 (3-4) ◽  
pp. 175
Author(s):  
Finley ◽  
Leng ◽  
Ellis
Keyword(s):  
Spot Welding

Development of an Induction-Free Current Sensor for Application in Spot-Welding Current Control

2012 ◽  
Vol 132 (1) ◽  
pp. 58-66
Author(s):  
Yoshiaki Takasaki ◽  
Tatsunori Munesada ◽  
Toshikatsu Sonoda
Keyword(s):  
Spot Welding ◽  
Welding Current ◽  
Current Control ◽  
Current Sensor ◽  
Free Current

THERMOMECHANICAL ANALYSIS OF THE RESISTANCE SPOT-WELDING PROCESS

2018 ◽  
Vol 10 (5) ◽  
pp. 449-455 ◽  
Author(s):  
Habib Lebbal ◽  
Lahouari Boukhris ◽  
Habib Berrekia ◽  
Abdelkader Ziadi
Keyword(s):  
Resistance Spot Welding ◽  
Spot Welding ◽  
Welding Process ◽  
Thermomechanical Analysis ◽  
Resistance Spot

Monitoring of YAG laser spot welding

2000 ◽  
Author(s):  
Daisuke Yamada ◽  
Shunro Yoshioka ◽  
Toshiyuki Miyazaki ◽  
Tadashi Misu ◽  
Yasuyuki Shirai
Keyword(s):  
Spot Welding ◽  
Laser Spot ◽  
Yag Laser ◽  
Laser Spot Welding
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