Aiming at adscititious magnetic field effect GTAW arc, decrease the maximum welding
residual which by arc shape be changed, avoid the temperature excessive focus on welding pool,
reduce temperature gradient and so on. Arc heat source model of GTAW under the magnetic field
was established, also consider physical properties of materials varying with the temperature and the
influence transformation, through the method of killing or activating elements treatment such as
melting or solidification by welding pool, 3D FEM simulation analysis for the temperature gradient
and residual stress size distribution to GTAW welded joints compared to on magnetic field or not.
The results show that maximum weld longitudinal residual stress and transverse residual stress were
respectively reduced by 12.3% and 13.6% when compared to no magnetic field, also have blind
hole measuring method measure welding residual stress, Test measurement and simulation values
were basically consistent.
Aiming at adscititious magnetic field effect GTAW arc, decrease the maximum weldingresidual which by arc shape be changed, avoid the temperature excessive focus on welding pool,reduce temperature gradient and so on. Arc heat source model of GTAW under the magnetic fieldwas established, also consider physical properties of materials varying with the temperature and theinfluence transformation, through the method of killing or activating elements treatment such asmelting or solidification by welding pool, 3D FEM simulation analysis for the temperature gradientand residual stress size distribution to GTAW welded joints compared to on magnetic field or not.The results show that maximum weld longitudinal residual stress and transverse residual stress wererespectively reduced by 12.3% and 13.6% when compared to no magnetic field, also have blindhole measuring method measure welding residual stress, Test measurement and simulation valueswere basically consistent.
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