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

A laser additive and high-entropy alloy technology, applied in additive manufacturing, additive processing, etc., can solve problems such as limited control performance, and achieve the effects of concise device structure, reduced pores, and reduced internal residual stress

Pending Publication Date: 2022-06-28
JIANGSU UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

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

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Experimental program
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Effect test

Embodiment 1

[0054] Dry the WTaNbMo refractory high-entropy alloy powder in a vacuum oven at 100°C for 1 hour, and take it out for use. The In718 substrate is cut and polished, pickled to clean the oil on the surface of the In718 substrate, and placed in the magnetic field unit 6, and the direction and frequency of the magnetic field are adjusted by the PLC controller 9. After the laser beam is focused, the magnetic field unit is turned on, and the WTaNbMo bulk material is prepared by coaxial powder feeding, and the argon gas protection is turned on at the same time. In the laser processing process, the experimentally optimized laser preparation process parameters using a disk laser (TruLaser Cell3000) are shown in the table below.

[0055]

[0056] The macroscopic morphology of the cross-section of the single-layer WTaNbMo refractory high-entropy alloy obtained after laser additive manufacturing is as follows: Figure 5 shown, combined with Figure 6-7 The EDS surface scan and the po...

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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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F12/90B22F10/28B22F12/40B22F12/50B33Y10/00B33Y30/00B33Y70/00C22C30/00
CPCB22F12/90B22F12/40B22F12/50B22F10/28B33Y30/00B33Y10/00B33Y70/00C22C30/00B22F2202/05Y02P10/25
Inventor 赵悦蒋鹏程李瑞峰张晓强李涛涛
Owner JIANGSU UNIV OF SCI & TECH
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