Effect of inner wall profile of field shaper on connection quality of magnetic pulse assisted semi-solid brazing joint
Aiming at the problems such as uneven removal effect of interfacial oxide film and significant difference of diffused layer depth when connecting Cu and Al tubes with equal inner diameter magnetic field shaper with magnetic pulse assisted semi-solid brazing process,the effects of inner wall profile and structural parameters of magnetic field shaper on interfacial impact stress and shear rheological rate of brazing metal were analyzed by numerical simulation.In order to achieve the uniformity in interface impact and axial shear rheological dis-tribution within the joint area,the shaped structure parameters of the field shaper were optimized,and the corresponding field shapers were manufactured.A series of brazing experiments were carried out under specific process parameters.The results show that compared with the conventional field shaper with equal inner diameter,the optimized field shaper can remove the surface oxide film of the base mate-rial better.The interface diffusion reaction is promoted and the connection defects are reduced,the diffusion layer thickness increases and the distribution is more uniform,and the joint performance is effectively improved.
magnetic pulsesemi-solid brazingfield shaperinterface defectshear rheologydiffusion layeroxide film
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NSTL
万方数据
维普
