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Technology for masking electrolytic machining of TC4 titanium alloy through sodium nitrate electrolyte solution

A processing technology and electrolyte technology, applied in the direction of electric processing equipment, processing working medium, electrochemical processing equipment, etc., can solve the problem of using harmful electrolyte

Active Publication Date: 2015-03-25
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention aims to improve the problem of using harmful electrolyte and mixed electrolyte in TC4 titanium alloy mask electrolytic machining

Method used

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  • Technology for masking electrolytic machining of TC4 titanium alloy through sodium nitrate electrolyte solution
  • Technology for masking electrolytic machining of TC4 titanium alloy through sodium nitrate electrolyte solution
  • Technology for masking electrolytic machining of TC4 titanium alloy through sodium nitrate electrolyte solution

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Effect test

Embodiment 1

[0030] Embodiment 1, the selected processing parameters are: electrolyte temperature 35°C, electrolyte concentration 9% at 20°C, electrolyte pressure 0.3MPa, processing voltage 25V. Process according to the above-mentioned embodiment, the processing time is 6 minutes, and the processing result is as follows Figure 4 shown. The obtained pore diameter exceeds the tolerance requirement, and nodules of electrolytic products appear on the inner wall of the pore, and the morphology of the pore is extremely poor.

Embodiment 2

[0031] In the second embodiment, the selected processing parameters are: electrolyte temperature 40°C, electrolyte concentration 15% at 20°C, electrolyte pressure 0.6MPa, processing voltage 35V. Process according to the above-mentioned embodiment, the processing time is 5 minutes and 35 seconds, and the processing result is as follows Figure 5 shown. The obtained pore diameter meets the tolerance requirements, and the shape of the hole is good, but the roundness of the hole is not ideal.

Embodiment 3

[0032] Embodiment 3, the selected processing parameters are: electrolyte temperature 45°C, electrolyte concentration 10% at 20°C, electrolyte pressure 0.5MPa, processing voltage 30V. Process according to the above-mentioned embodiment, the processing time is 5 minutes and 10 seconds, and the processing result is as follows Figure 6 shown. The obtained hole diameter meets the tolerance requirement, and the quality of the hole meets the actual engineering requirements.

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Abstract

The invention discloses a technology for masking electrolytic machining of TC4 titanium alloy through a sodium nitrate electrolyte solution, and belongs to the technical field of electrolytic machining. A double-cathode single-face machining mode or a double-cathode double-face masking electrolytic machining mode is adopted. The technology for masking electrolytic machining of TC4 titanium alloy through the sodium nitrate electrolyte solution is characterized in that the temperature range of the NaNO3 electrolyte solution is 40-50 DEG C in the electrolytic machining process, the concentration of the NaNO3 electrolyte solution is 10%-20% under the temperature condition of 20 DEG C, it is guaranteed that the pressure of a machining area is 0.4-0.6 MPa when the NaNO3 electrolyte solution is used, and the machining voltage is 30-40 V when the NaNO3 electrolyte solution is used. By the adoption of the machining technology, the non-toxic and harmless NaNO3 solution is used as the electrolyte solution for electrolytic machining of TC4 titanium alloy, a traditional electrolytic machining environment of TC4 titanium alloy is improved, and therefore the technology is of great significance.

Description

Technical field [0001] The invention discloses a processing technique for electrolytically processing TC4 titanium alloy with a sodium nitrate electrolyte mask, and belongs to the technical field of electrolytic processing. Background technique [0002] TC4 titanium alloy is widely used in aviation, aerospace, chemical industry, electric power and other fields because of its high specific strength, good corrosion resistance and high heat resistance. The excellent mechanical properties of titanium alloy also make its cutting performance poor. In addition, a considerable number of titanium alloy parts have complex shapes and high surface precision requirements. Therefore, with the continuous development of electrolytic machining technology, the machining of titanium alloys with complex shapes and thin-wall variability has shown greater advantages. [0003] Electrolytic machining is to use the principle of electrochemical anodic dissolution of metal in electrolyte to obtain pa...

Claims

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Application Information

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IPC IPC(8): B23H3/00B23H3/08B23H9/00
CPCB23H3/00B23H3/04B23H3/08
Inventor 李寒松王国乾曲宁松
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS