Chemical milling solution for aluminum-lithium alloy

A technology of aluminum-lithium alloy and solution, applied in the field of aluminum-lithium alloy milling solution, can solve the problems of scrapped, coarse parts, affecting the production and delivery period, etc., and achieve the effect of small surface roughness and good milling effect

Inactive Publication Date: 2012-01-25
SHENYANG AIRCRAFT CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The 5A90 material is currently the most widely used aluminum-lithium alloy in China. Although it has been used for many years, the current chemical milling process still uses the same bath composition and process parameters as conventional aluminum alloys. Stripes always appear on the surface of the chemical milling area after chemical milling. Defects such as corrosion pits or rough surfaces have greatly affected the quality of aluminum-lithium alloy chemical milling parts, resulting in a large number of such parts being scrapped, and also greatly affecting the production delivery schedule

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] NaOH 160g, Na 2 S 20g, triethanolamine 45g, dissolved aluminum Al 3+ 30g and the balance of water to make a 1000ml solution.

[0009] In the chemical milling process, the solution temperature is controlled at 90±2°C.

Embodiment 2

[0011] NaOH 140g, Na 2 S 13g, triethanolamine 40g, dissolved aluminum Al 3+ 19g and the balance of water to make a solution of 1000ml.

[0012] In the chemical milling process, the solution temperature is controlled at 80±2°C.

Embodiment 3

[0014] NaOH 180g, Na 2 S 22g, triethanolamine 50g, Al 3+ 60g and the balance of water to make a solution of 1000ml.

[0015] In the chemical milling process, the solution temperature is controlled at 100±2°C.

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PUM

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Abstract

The invention relates to chemical milling solution for an aluminum-lithium alloy. The solution is characterized in that: 1000ml of solution is prepared by 140 to 180g of NaOH, 13 to 22g of Na2S, 40 to 50g of triethanolamine, 19 to 60g of Al<3+> and the balance of water. The aluminum-lithium alloy which is milled by the chemical milling solution has high surface accuracy, does not have chemical milling transition region defects and completely meets technical requirements.

Description

technical field [0001] The invention relates to an aluminum-lithium alloy chemical milling solution, which is used for processing the aluminum-lithium alloy chemical milling process. Background technique [0002] Adding active elements such as lithium and magnesium to aluminum-lithium alloy has excellent properties such as high specific strength and light weight. It is a new type of material that is widely used in the world's aviation industry. On a certain series of airliners, more than 70% of the skin panels are made of aluminum-lithium alloy materials. With the development of the aviation industry, aluminum-lithium alloy materials will be more and more widely used. [0003] The 5A90 material is currently the most widely used aluminum-lithium alloy in China. Although it has been used for many years, the current chemical milling process still uses the same bath composition and process parameters as conventional aluminum alloys. Stripes always appear on the surface of the ch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F1/04C23F1/36
Inventor 李博
Owner SHENYANG AIRCRAFT CORP
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