External field assisted high-entropy alloy laser additive manufacturing device and method thereof

Abstract

The invention belongs to the field of laser additive manufacturing, and particularly relates to an external-field-assisted high-entropy alloy laser additive manufacturing device and method.The external-field-assisted high-entropy alloy laser additive manufacturing device comprises a metal substrate, a magnetic field unit located around the metal substrate, a magnetic field control unit, a laser and a laser additive manufacturing coaxial powder feeder; the magnetic field unit comprises electromagnets A1, A3, A2 and A4 which are respectively arranged in the front direction, the rear direction, the left direction and the right direction of the metal substrate; the magnetic field control unit comprises a PLC (Programmable Logic Controller), an electromagnetic relay and a working power supply, the electromagnetic relay is respectively connected with the electromagnets A1, A2, A3 and A4, the PLC controls the electromagnetic relay to realize the on-off among the electromagnets A1, A2, A3 and A4, a dynamic reciprocating electromagnetic field is formed around the metal substrate, and the working power supply is connected with the electromagnetic relay. And electromagnetic force is generated through regular changes of the dynamic magnetic field to regulate and control fluid movement in the molten pool, the turbulence effect in the molten pool is improved, the fluidity of the WTaNbMo refractory high-entropy alloy molten pool is improved, the defects of looseness and air holes can be reduced, and important application value is achieved.

Description

technical field [0001] The invention relates to the field of laser additive manufacturing, in particular to an external field assisted high-entropy alloy laser additive manufacturing device and method thereof. Background technique [0002] Laser additive manufacturing (laser 3D printing) is an efficient additive manufacturing technology. It uses laser beams to act on the surface of metal substrates to pre-coat metal surfaces or powder materials fed in synchronously, so that the materials and metal substrates The surface melts and solidifies during the subsequent cooling process to form a low dilution rate alloy layer with good metallurgical bonding on the surface of the metal substrate to achieve the purpose of material surface repair or additive manufacturing. Laser additive manufacturing can realize the preparation of complex parts and improve the utilization rate of materials. Compared with traditional forging methods, laser additive manufacturing solidifies faster, and ...

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Problems solved by technology

However, the control performance of the single static magnetic field disclosed in the above research is limited in the laser cladding manufacturing process, and it is necessary to further improve and improve the magnetic field-assisted form of laser cladding of refractory high-entropy alloys to meet its requirements in laser cladding. Application requirements during cladding

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