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High-entropy alloy arc-laser composite additive manufacturing method

A high-entropy alloy and additive manufacturing technology, used in manufacturing tools, additive processing, laser welding equipment, etc., can solve the problems of rough microstructure, long production cycle, and defective structure of high-entropy alloys, and achieve heat input. Accurately controllable, low porosity, and improved stability

Inactive Publication Date: 2020-02-18
FOSHAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In summary, the preparation methods of high-entropy alloys in the prior art mainly include methods such as melting and casting, powder metallurgy, spraying and coating, and the microstructure of the high-entropy alloy produced by the method is relatively rough, the structure is defective, and the production cycle is long , the cost is relatively high

Method used

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  • High-entropy alloy arc-laser composite additive manufacturing method
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Examples

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Effect test

Embodiment 1

[0038] A method for high-entropy alloy arc-laser composite additive manufacturing, including using low-power fiber laser and MIG arc as a composite heat source, melting high-entropy alloy welding wire on a substrate to carry out surfacing welding according to a specified path, and the surfacing layer is superimposed layer by layer Forming the required high-entropy alloy structural parts specifically includes the following steps:

[0039] S1. The low-power pulsed laser and the MIG arc are combined to form a composite heat source. The arc is in front and the laser is in the back. The high-entropy alloy welding wire is sent as the melting electrode through the MIG welding torch, and both the laser gun and the MIG welding torch are located above the substrate. The angle between the laser gun and the MIG welding torch is α, and the distance between the light wires is L;

[0040] Specifically, in step S1, the angle α between the laser gun and the MIG welding torch is 25°-40°, and th...

Embodiment 2

[0051] A method for high-entropy alloy arc-laser composite additive manufacturing, including using low-power fiber laser and MIG arc as a composite heat source, melting high-entropy alloy welding wire on a substrate to carry out surfacing welding according to a specified path, and the surfacing layer is superimposed layer by layer Forming the required high-entropy alloy structural parts specifically includes the following steps:

[0052] S1. The low-power pulsed laser and the MIG arc are combined to form a composite heat source. The arc is in front and the laser is in the back. The high-entropy alloy welding wire is sent as the melting electrode through the MIG welding torch, and both the laser gun and the MIG welding torch are located above the substrate. The angle between the laser gun and the MIG welding torch is α, and the distance between the light wires is L;

[0053] Specifically, in step S1, the angle α between the laser gun and the MIG welding torch is 25°-40°, and th...

Embodiment 3

[0065] A method for high-entropy alloy arc-laser composite additive manufacturing, including using low-power fiber laser and MIG arc as a composite heat source, melting high-entropy alloy welding wire on a substrate to carry out surfacing welding according to a specified path, and the surfacing layer is superimposed layer by layer Forming the required high-entropy alloy structural parts specifically includes the following steps:

[0066] S1. The low-power pulsed laser and the MIG arc are combined to form a composite heat source. The arc is in front and the laser is in the back. The high-entropy alloy welding wire is sent as the melting electrode through the MIG welding torch, and both the laser gun and the MIG welding torch are located above the substrate. The angle between the laser gun and the MIG welding torch is α, and the distance between the light wires is L;

[0067] Specifically, in step S1, the angle α between the laser gun and the MIG welding torch is 25°-40°, and th...

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Abstract

The invention provides a high-entropy alloy arc-laser composite additive manufacturing method. The method comprises the steps that a low-power optical fiber laser and an MIG arc are adopted as a composite heat source, a high-entropy alloy welding wire is melted on a substrate according to a specified path for surfacing, and surfacing layers are stacked layer by layer to form a required high-entropy alloy structural member. According to the high-entropy alloy arc-laser composite additive manufacturing method, the low-power pulse laser is used, the energy consumption is low, and the electric energy is saved; the direct-current dual-pulse MIG has the advantages of being stable welding arc, smooth in droplet transition, accurate and controllable in heat input, good in welding seam formation, low in joint porosity and reliable in mechanical property; the method can combine the characteristics of low cost, high efficiency, high precision, high performance and the like, and can meet the requirements of additive manufacturing for complex structural parts; in addition, supplement welding wire can be additionally arranged, the stability of the welding process can be further increased, the forming speed is greatly improved, the precision and performance of the formed test part can be greatly improved, and the generation of air holes can be reduced.

Description

technical field [0001] The invention relates to the field of high-entropy alloy additive manufacturing, in particular to a method for high-entropy alloy arc-laser composite additive manufacturing. Background technique [0002] High-entropy alloy is a new type of metal material. It is composed of five or more metal elements in equimolar mass ratio or approximately equimolar mass. It also has excellent mechanical properties at low and high temperatures, and has a high Excellent thermal stability and high temperature oxidation resistance, has a wide range of application prospects. [0003] After a massive search by the applicant, it was found that the high-entropy alloy additive manufacturing method in the prior art, such as the preparation method of a high-entropy alloy powder and high-entropy alloy coating for laser cladding disclosed by the publication number CN103290404B, this technical solution laser After cladding, it is easy to obtain good coating quality. It has many e...

Claims

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Application Information

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IPC IPC(8): B23K26/342B23K26/348B33Y10/00
CPCB33Y10/00B23K26/342B23K26/348
Inventor 陈峯王凯何宽芳丁东红卢清华
Owner FOSHAN UNIVERSITY
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