Experimental method for electric pulse auxiliary regulation and control additive manufacturing near-[Beta] type titanium alloy metallographic structure

A technology of additive manufacturing and experimental method, applied in the field of additive manufacturing, which can solve the problems of high energy consumption, limited service life, long processing time, etc.

Inactive Publication Date: 2019-08-30
WUHAN UNIV OF TECH
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Problems solved by technology

[0002] Additive manufacturing (3D printing technology) is a technology based on digital models, using bondable materials such as powder metal, and using layer-by-layer printing to construct physical objects. It does not require machining or molds, and only uses computer software to make any Shaped parts can greatly shorten the product development cycle, reduce production costs, and improve efficiency. However, a large number of columnar β phases formed in the process of additively manufacturing near-β-type titanium alloys restrict the overall performance of the alloy, which not onl...

Method used

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  • Experimental method for electric pulse auxiliary regulation and control additive manufacturing near-[Beta] type titanium alloy metallographic structure
  • Experimental method for electric pulse auxiliary regulation and control additive manufacturing near-[Beta] type titanium alloy metallographic structure
  • Experimental method for electric pulse auxiliary regulation and control additive manufacturing near-[Beta] type titanium alloy metallographic structure

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Embodiment Construction

[0015] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0016] An experimental method for electric pulse-assisted regulation and control of additive manufacturing near-β-type titanium alloy phase structure, comprising steps:

[0017] 1) Preparation of experimental samples;

[0018] Using Ti55531 powder as raw material, a cubic titanium alloy is obtained through additive manufacturing, and then a cylindrical titanium alloy sample with flat ends (diameter Φ=4.5mm, height h=10mm) is processed by wire cutting, and finally passed 240# The oxide layer on the surface of the titanium alloy sample was removed by sanding.

[0019] 2) Experimental process;

[0020] The two ends of the polished titanium alloy sample were respectively in full contact with the two electrodes of the electric pulse treatment equipment, and the current and action time of the electric pulse treatment equipment were adjusted (current 70A, ac...

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Abstract

The invention discloses an experimental method for an electric pulse auxiliary regulation and control additive manufacturing near-[Beta] type titanium alloy metallographic structure. The experimentalmethod comprises the following steps that: 1) through additive manufacturing, obtaining a cubic titanium alloy, processing a cylindrical titanium alloy sample of which two end surfaces are flat, and finally, polishing to remove an oxidation layer on the surface of the titanium alloy sample; 2) independently enabling tow end surfaces of the polished titanium alloy sample to be in complete contact with two electrodes of electric pulse processing equipment, regulating the current and the acting time of the electric pulse processing equipment, and carrying out electric pulse processing on the titanium alloy sample; and 3) cutting the titanium alloy sample subjected to the electric pulse processing, through a hot inlay method to prepare a metallographic specimen, polishing, buffing, cleaning and corroding the surface of the metallographic specimen, and utilizing a metallographic microscope and a field emission scanning electron microscopy to represent and analyze the change of an [Alpha] phase and a [Beta] phase before and after electric pulse processing. By use of the method, the additive manufacturing near-[Beta] type titanium alloy metallographic structure is changed and verified with small energy consumption and short time consumption, and the combination property of the additive manufacturing near-[Beta] type titanium alloy is improved.

Description

technical field [0001] The invention belongs to the field of additive manufacturing, and in particular relates to an experimental method for electric pulse-assisted regulation and additive manufacturing of near-β-type titanium alloy phase structure. Background technique [0002] Additive manufacturing (3D printing technology) is a technology based on digital models, using bondable materials such as powder metal, and using layer-by-layer printing to construct physical objects. It does not require machining or molds, and only uses computer software to make any Shaped parts can greatly shorten the product development cycle, reduce production costs, and improve efficiency. However, a large number of columnar β phases formed in the process of additively manufacturing near-β-type titanium alloys restrict the overall performance of the alloy, which not only limits additive manufacturing. The service life of formed parts also restricts the development of additive manufacturing techn...

Claims

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Application Information

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IPC IPC(8): G01N21/84G01N23/2251C22F1/18B33Y80/00
CPCB33Y80/00C22F1/183G01N21/84G01N23/2251G01N2223/071
Inventor 华林谢乐春郭豪杰
Owner WUHAN UNIV OF TECH
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