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Electric pulse treatment method for improving defect or structure state of selective laser melting additive manufacturing titanium alloy

A technology of laser selective melting and additive manufacturing, which is applied in the field of electrical pulse processing to improve the defects or microstructure of titanium alloys by laser selective melting and additive manufacturing. Efficiency, significant organizational impact, defects, and the effect of improving organizational status

Active Publication Date: 2021-08-06
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Hot isostatic pressing is an available method to optimize the defects and microstructure of additive manufacturing, but this method requires heating and pressing, and also requires a certain amount of processing time, which is costly and prone to grain growth, thereby reducing its strength

Method used

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  • Electric pulse treatment method for improving defect or structure state of selective laser melting additive manufacturing titanium alloy
  • Electric pulse treatment method for improving defect or structure state of selective laser melting additive manufacturing titanium alloy
  • Electric pulse treatment method for improving defect or structure state of selective laser melting additive manufacturing titanium alloy

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Embodiment Construction

[0023] The present invention is described in detail below in conjunction with accompanying drawing.

[0024] The present invention utilizes a high-energy pulse current device (for this device, refer to the relevant content in the patent with the application number 201811364353.4 and the invention title "An electric pulse processing device and method for reducing the fatigue crack growth rate of iron and steel materials"), using a single high-energy pulse The huge energy released by the current is manufactured by additively manufacturing titanium alloys ( figure 1 ) to improve its defects and organizational status. The electric pulse technology can be used for the research and application of the defect and structure optimization of additive manufacturing titanium alloy.

[0025] Using the above device to conduct electric pulse treatment on the Ti-6Al-4V titanium alloy sample for additive manufacturing, and compare and analyze the effect with the Ti-6Al-4V sample without electr...

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Abstract

The invention discloses an electric pulse treatment method for improving the defect or structure state of selective laser melting additive manufacturing titanium alloy, and belongs to the technical field of additive manufacturing material optimization. The method is characterized in that the additive manufacturing titanium alloy is subjected to electric pulse treatment, and the defect or the structure state of the titanium alloy is improved to a certain extent, wherein in the treatment process of optimizing the structure state of the titanium alloy through the electric pulse, the electric pulse discharging waveform is a damping wave, the discharging period is 400 ns, and the treatment voltage and the treatment frequency are 6 kV-1 times, 7 kV -1 times, 7.5 kV -1 times, 8 kV -1 times and 8.5 kV -1 times correspondingly; and in the treatment process of optimizing the defect state of the titanium alloy through the electric pulse, the electric pulse discharge waveform is a damping wave, the discharging period is 400 ns, and the treatment voltage and treatment frequency are 3.5 kV-3 times. The electric pulse treatment method can be used for research and application of defect and structure optimization of the additive manufacturing titanium alloy.

Description

technical field [0001] The invention relates to the technical field of microstructure and mechanical property optimization of materials manufactured by laser selective melting, in particular to an electric pulse processing method for improving defects or tissue states of titanium alloys manufactured by laser selective melting and additive manufacturing. Background technique [0002] Selective laser melting (SLM) additive manufacturing technology is a kind of 3D printing technology. Different from traditional removal and cutting technology, additive manufacturing technology is based on CAD modeling for slicing processing. By layering materials The technology of manufacturing solid parts by additive method is a "bottom-up" material additive manufacturing method [Lu Bingheng, Li Dichen, Additive Manufacturing (3D Printing) Technology Development, Machinery Manufacturing and Automation, 42(2013) 1-4 ; Junfeng Li, Zhengying Wei, Bingheng Lu, Research progress on selective laser m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/18C22F3/00B22F10/60B22F10/64B22F10/28
CPCC22F1/183C22F3/00B22F3/24B22F2003/248Y02P10/25
Inventor 阳华杰贲丹丹高佳宝孟令晓邵琛玮张哲峰
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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