Method for improving anisotropy of additive manufacturing titanium alloy through pulse current

A technology of additive manufacturing and pulse current, which is applied in the direction of additive manufacturing, additive processing, and process efficiency improvement, and can solve the problems of complex process, long time consumption, and high energy consumption.

Active Publication Date: 2021-08-13
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the deficiencies of traditional heat treatment to eliminate the anisotropy of additive manufacturing titanium alloys, such as long time consumption, high energy consumpt

Method used

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  • Method for improving anisotropy of additive manufacturing titanium alloy through pulse current
  • Method for improving anisotropy of additive manufacturing titanium alloy through pulse current
  • Method for improving anisotropy of additive manufacturing titanium alloy through pulse current

Examples

Experimental program
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Effect test

specific Embodiment approach 1

[0028] (1) Ti6Al4V alloy components were prepared by laser direct deposition technology. Clean the deposited surface and remove the metal particles adhering to it.

[0029] (2) Cut the above-mentioned Ti6Al4V alloy member along the deposition direction to obtain a cuboid member with a length of 45 mm, a height of 15 mm, and a thickness of 3 mm.

[0030] (3) Fix the above-mentioned workpiece through a pure copper fixture, and then connect the two ends of the pulse power supply with a pure copper wire to keep the complete contact between the fixture and the workpiece, and avoid excessive resistance at the joint;

[0031] (3) Place the clamped component horizontally on the pulse current workbench;

[0032] (4) Parameters are set, and a pulse current of 130V / 350Hz is applied to the above-mentioned components. Cut off the power supply of the device after 20s counted from the power on.

[0033] (5) Remove the workpiece after cooling to room temperature.

[0034] figure 1 It is ...

specific Embodiment approach 2

[0039] The difference between this embodiment and Embodiment 1 is that the alloy is prepared by laser selective melting deposition technology in step (1).

specific Embodiment approach 3

[0041] The difference between this embodiment and Embodiment 1 is that the alloy is prepared by electron beam additive manufacturing technology in step (1).

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Abstract

The invention provides a method for improving anisotropy of an additive manufacturing titanium alloy through pulse current, and solves the problems of high energy consumption, high time consumption, difficulty in popularization and poor effect on large components in an existing post-treatment technology. The method comprises the following steps: (1) the surface of the additive manufacturing alloy component is cleaned; (2) the alloy is fixed through a clamp and then connected to the two ends of a pulse power source, and the clamp and the workpiece keep complete contact; (3) the clamped component is horizontally placed on a specific device, and is kept horizontal; (4) the voltage, the frequency and the action time are adjusted, and the additive manufacturing titanium alloy is treated through pulse current; and (5) the pulse power source is turned off, and the component is taken down after being cooled to the room temperature. The method has the advantages of being simple in process, rapid in implementation, capable of easily achieving batch production, capable of being applied to large workpiece treatment, wide in application range and the like, and can be applied to additive manufacturing of the titanium alloy, stainless steel, an aluminum alloy, a high-temperature alloy and the like and corresponding components.

Description

technical field [0001] The invention belongs to the field of forming and processing materials for laser additive manufacturing, and in particular relates to a processing method for improving the anisotropy of the microstructure and performance of titanium alloys manufactured by using pulse current. Background technique [0002] Titanium alloys have the characteristics of high specific strength, good corrosion resistance, and high heat resistance, and are often used to manufacture important load-bearing components such as beams, joints, and bulkheads in important structures. These components have high requirements on the mechanical properties and anisotropy of properties of alloys. [0003] Titanium alloys have high resistance to deformation during cold working, and it is difficult to obtain parts with complex shapes. Additive manufacturing technology provides a solution for the processing of complex-shaped titanium alloy parts. Through high-power laser / electron beam and ot...

Claims

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Application Information

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IPC IPC(8): C22F3/00B22F10/60B33Y40/20
CPCC22F3/00B22F3/24B33Y40/20Y02P10/25
Inventor 佟运祥王福斌王建东姜风春李莉
Owner HARBIN ENG UNIV
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