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A method for improving the anisotropy of additively manufactured titanium alloys using pulsed current

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

Active Publication Date: 2022-05-20
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 consumption, and complicated process, the present invention provides a process for improving the performance anisotropy of additive manufacturing titanium alloy components by using pulse current

Method used

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  • A method for improving the anisotropy of additively manufactured titanium alloys using pulsed current
  • A method for improving the anisotropy of additively manufactured titanium alloys using pulsed current
  • A method for improving the anisotropy of additively manufactured titanium alloys using pulsed current

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Experimental program
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Effect test

specific Embodiment approach 1

[0027] (1) Ti6Al4V alloy components were prepared by laser direct deposition technology. Clean the deposited surface to remove metal particles adhering to it.

[0028] (2) The above-mentioned Ti6Al4V alloy member was cut along the deposition direction to obtain a rectangular parallelepiped member with a length of 45 mm, a height of 15 mm, and a thickness of 3 mm.

[0029] (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;

[0030] (3) Place the clamped component horizontally on the pulse current workbench;

[0031] (4) Set parameters and apply a pulse current of 130V / 350Hz to the above components. Turn off the power of the device after 20s counted from the start of power-on.

[0032] (5) Remove the workpiece after it cools to room temperature.

[0033] figure 1 For...

specific Embodiment approach 2

[0037] The difference between this embodiment and the first embodiment is that in step (1), the alloy is prepared by using the laser selective melting deposition technology.

specific Embodiment approach 3

[0038] The difference between this embodiment and Embodiment 1 is that in step (1), the alloy is prepared by electron beam additive manufacturing technology.

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Abstract

The invention provides a method for improving the anisotropy of additively manufactured titanium alloys by using pulse current, which solves the problems of the existing post-processing technology, which consumes a lot of energy, takes a lot of time, is difficult to popularize, and has poor effect on large-scale components. The method is as follows: (1) Clean the surface of the additively manufactured alloy component. (2) Fix the above-mentioned alloy through the fixture, and then connect both ends of the pulse power supply to keep the fixture in complete contact with the workpiece; (3) Place the clamped component horizontally on a specific device to maintain the level; (4) Adjust Voltage, frequency and action time, use the pulse current to process the additive manufacturing titanium alloy; (5) turn off the pulse current, and remove the component after cooling to room temperature. The invention has the advantages of simple process, fast implementation, easy mass production, can be applied to large-scale workpiece processing, and has a wide application range, and can be applied to additive manufacturing of titanium alloys, stainless steel, aluminum alloys, high-temperature alloys, etc., and corresponding components.

Description

technical field [0001] The invention belongs to the field of laser additive manufacturing material forming and processing, in particular to a processing method for improving the anisotropy of microstructure and performance of titanium alloy 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 the alloys. [0003] Titanium alloys have high resistance to cold working deformation, and it is difficult to obtain parts with complex shapes. Additive manufacturing technology provides a solution for the machining of complex-shaped titanium alloy parts. The titanium alloy powder that is synchronously transported is melted by high-energy beams such as h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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