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Chemical milling solution and chemical milling process suitable for Al-Mg-Sc alloy

A chemical milling and solution technology, applied in the field of aluminum alloy processing, can solve the problem that there is no chemical milling process of Al-Mg-Sc alloy.

Pending Publication Date: 2022-08-02
SOUTHWEST ALUMINUM GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] With the development of Al-Mg-Sc alloy in recent years, the strength of Al-Mg-Sc alloy sheet can reach the level of Al-Cu-Mg alloy, and its corrosion resistance and welding performance are better, so it can be used as aircraft skin material. The research on chemical milling of Al-Mg-Sc alloy has not been reported, and there is no chemical milling process suitable for Al-Mg-Sc alloy

Method used

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  • Chemical milling solution and chemical milling process suitable for Al-Mg-Sc alloy
  • Chemical milling solution and chemical milling process suitable for Al-Mg-Sc alloy
  • Chemical milling solution and chemical milling process suitable for Al-Mg-Sc alloy

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Experimental program
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Effect test

Embodiment 1

[0035] 1) Configure the milling solution: first add 180g / L sodium hydroxide, stir evenly, add 20g / L aluminum shavings, completely dissolve, stir evenly, and finally add 40g / L triethanolamine and 10g / L sodium sulfide, stir Uniform, water bath heating temperature 90 ℃;

[0036] 2) Hang the Al-Mg-Sc alloy plate test piece with a thickness of H=5.00 mm vertically and immerse it in the chemical milling solution, take it out after chemical milling for 10 minutes, pickle to remove surface corrosion products, blow dry, and measure the thickness h of the test piece after chemical milling =4.36mm, through the thinning thickness of the test piece before and after the corrosion and the milling time, the single-sided milling speed of the Al-Mg-Sc alloy plate in the solution is calculated v=(H-h)÷2÷t=0.032mm / min; the chemical milling speed v is within the range of 0.025-0.035mm / min of the conventional requirement, indicating that the formulation of the chemical milling process is very in l...

Embodiment 2

[0040] 1) Configure the milling solution: first add 200g / L sodium hydroxide, stir evenly, add 30g / L aluminum shavings, after complete dissolution, stir evenly, finally add 40g / L triethanolamine, 10g / L sodium sulfide, stir Uniform, water bath heating temperature 90 ℃;

[0041] 2) Hang the Al-Mg-Sc alloy plate test piece with a thickness of H=5.00 mm vertically and immerse it in the chemical milling solution, take it out after chemical milling for 10 minutes, pickle to remove surface corrosion products, blow dry, and measure the thickness h of the test piece after chemical milling =4.31mm, through the thinning thickness of the test piece before and after the corrosion and the milling time, the single-sided milling speed of the Al-Mg-Sc alloy plate in the solution is calculated v=(H-h)÷2÷t=0.0345mm / min;

[0042] 3) According to the milling speed, calculate the time t=5×1 / 4÷0.0345=36min required to mill the 5.0mm sheet to 1 / 4 thickness;

[0043] 4) According to the calculated t...

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Abstract

The invention provides a chemical milling solution suitable for an Al-Mg-Sc alloy. The chemical milling solution is composed of 150-200 g / L of sodium hydroxide, 10-50 g / L of aluminum, 30-50 g / L of triethanolamine and 5-15 g / L of sodium sulfide. The invention further provides a chemical milling method using the chemical milling solution. According to the chemical milling solution suitable for the Al-Mg-Sc alloy, the corrosive agent and the corrosion inhibitor are selected, so that the surface appearance and roughness of a chemical milling surface of the Al-Mg-Sc alloy subjected to chemical milling are excellent, and the requirements of aerospace materials can be met.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy processing, in particular to a chemical milling solution and a chemical milling process suitable for Al-Mg-Sc alloys. Background technique [0002] Chemical milling is abbreviated as chemical milling, which is to expose the parts of metal materials that need to be processed to chemical media for corrosion, and protect the parts that do not need to be processed to obtain the required shape and size of the parts. Chemical milling is essentially different from general mechanical processing. It uses the principle of chemical or electrochemical corrosion to process parts. Through the effective control of chemical milling fluid, the matrix material is removed from the predetermined position, range and depth on the workpiece, so that the To obtain the required machining size and accuracy, the machined parts can be etched over the entire surface, or selectively, multi-step or tapered. Chemical mil...

Claims

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Application Information

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IPC IPC(8): C23F1/04C23F1/36
CPCC23F1/04C23F1/36
Inventor 冯旺杨鹏彦
Owner SOUTHWEST ALUMINUM GRP
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