Abstract
Various techniques for producing fixed joints in solid using electromagnetic fields are considered; basic diagrams, physics, features, and technical capabilities of each method are described. It is shown that thin-walled tubular irregular structures can be obtained under the magnetic-pulse moulding welding that joins the combined actions of induced currents passing through the overlap zone and magnetic pressure for apposing the weldable edges and for shaping in accordance with the matrix configuration. Obtaining joints from dissimilar materials and structures of different thicknesses is implemented due to shock pulse capacitor welding with magnetic pulse drive. The series connection of the weldable parts enables to synchronize the current flow and force impact on the weld junction. Depending on the combination of the weldable products, three techniques of shock pulse capacitor welding with magnetic pulse drive are proposed. To intensify the quality improvement of the female connectors obtained, it is proposed to use the magnetic-pulse welding in vacuum instead of the diffusion welding. Preheating of the complete unit in vacuum allows for the pre-activation of the connectable surfaces. A unique feature of the implemented diagram is a remote action on the telescopic joints of dissimilar alloys heated in vacuum to the pre-melting temperatures through a quartz glass.
Highlights
The application of electromagnetic pressure to intensify the processes of connecting materials in the solid phase is promising
A typical process of the magnetic-pulse welding (MPW) is carried out using a glancing collision that provides the appearance of a cleaning cumulative jet and a mutual deformation of the connectable juvenile surfaces
Detonation in explosive is replaced by energy of the electromagnetic field [1]
Summary
The application of electromagnetic pressure to intensify the processes of connecting materials in the solid phase is promising. A typical process of the magnetic-pulse welding (MPW) is carried out using a glancing collision that provides the appearance of a cleaning cumulative jet and a mutual deformation of the connectable juvenile surfaces. The process is similar to the explosion bonding, but a different energy source is used. Magnetic pulse welding (MPW) can produce high-quality connections of similar and dissimilar metals in the air or inert medium. A typical MPW process cannot produce tubular irregular parts, connect core parts with sheet dissimilar materials, or obtain long joints of emission coatings with cathode bases. 2 closed-loop parts, dissimilar joints from parts of different thickness, and shell structures. All these advanced technologies are developed at Don State Technical University, Russia
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