In order to investigate the effect mechanism of longitudinal magnetic field on the Al/Steel cold metal transfer(CMT) welding process, the morphology and temperature distribution of weld arc and the flow behavior of molten pool are simulated by ANSYS software in present work. The results show that the external magnetic field (EMF) could change the movement of arc plasma, and ultimately affected the arc shape as well as the heat conduction behavior from weld arc to the molten pool and base plate. With application of EMF, the peak temperature of molten pool decreases, and the high-temperature zone moves from the center of molten pool to the lateral, which decreases the reaction temperature and retention time of high-temperature at the front interface of Al/steel joint. Besides that, the application of EMF also changes the flow behavior of molten pool. The flow behavior inside the molten pool changes from the single circulation into a double circulation flow characteristics by application of EMF. With the increase of core exciting current, the flow rate of inside molten pool is increase.
LIU Yibo
,
ZHANG Hongming
,
SUN Qingjie
,
LI Junzhao
,
FENG Jicai
. Effect of Magnetic Field on the Weld Temperature Field and Flow Behavior of Molten Pool in Al/Steel CMT Welding Process[J]. Journal of Mechanical Engineering, 2018
, 54(2)
: 48
-54
.
DOI: 10.3901/JME.2018.02.048
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