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Aluminum alloy chemical-milling solution and milling method using same

An aluminum alloy and solution technology, applied in the field of metal processing, can solve the problems of high chemical milling temperature, large chemical milling rate range, large difference in surface roughness, etc., and achieves high chemical milling speed, convenient process parameter control, and surface roughness. small effect

Inactive Publication Date: 2013-04-03
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although the above alkaline chemical milling solution can be used for milling processing of various aluminum alloys, there are problems with high chemical milling temperature (75-110°C), large chemical milling rate range (0.010-0.070mm / min), surface Large difference in roughness (Ra=0.8~4.0μm), etc., especially when the depth of chemical milling exceeds 5mm, the roughness of the material surface increases significantly

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0017] (1) According to the volume of the prepared solution and 180g / L NaOH, 20g / L NaOH 2 S, 40g / LTEA, 10g / L EDTA, 20g / LNa 2 S 2 o 3 ·5H 2 0. The amount of 30g / L Al weighs each component of the solution; first add 1 / 3 volume of water in the chemical milling tank, and then add NaOH, NaOH and NaOH under stirring conditions. 2 S, EDTA, and then add Na dissolved in water in advance 2 S 2 o 3 ·5H 2 O, TEA and pure aluminum, make up the remaining water, and stir well.

[0018] (2) Heat the chemical milling solution to 85°C, then grind, clean and degrease successively with 200#-2000# water sandpaper (10g / L NaOH+30g / LNa at 70°C 2 SiO 3 9H 22219 aluminum alloy after pretreatment such as washing in O+664 detergent system for 2 minutes), flowing water washing, light emitting (soaking in room temperature, 300g / L nitric acid solution for 5 minutes), flowing water washing, hot air drying at 60-80°C, etc. In , the milling treatment was performed at a solution stirring speed of 100...

experiment approach 2

[0021] (1) According to the volume of the prepared solution and 160g / L NaOH, 15g / L NaOH 2 S, 30g / LTEA, 20g / L EDTA, 15g / LNa 2 S 2 o 3 ·5H 2 0. The amount of 40g / L Al weighs each component of the solution; first add 1 / 3 volume of water in the chemical milling tank, and add NaOH, NaOH and NaOH successively under stirring conditions. 2 S, EDTA, and then add Na dissolved in water in advance 2 S 2 o 3 ·5H 2 O, TEA and pure aluminum, make up the remaining water, and stir well.

[0022] (2) Heat the chemical milling solution to 90°C, then grind, clean, and chemically degrease successively with 200#-2000# water sandpaper (10g / L NaOH+30g / LNa at 70°C 2 SiO 3 9H 2 LY12 aluminum alloy after pretreatment such as washing in O+664 detergent system for 2min), flowing water washing, light emitting (soaking in room temperature, 300g / L nitric acid solution for 5min), flowing water washing, hot air drying at 60-80°C, etc. In , the milling treatment was carried out at a solution stirring...

experiment approach 3

[0025] (1) According to the volume of the prepared solution and 200g / L NaOH, 30g / L NaOH 2 S, 50g / LTEA, 25g / L EDTA, 30g / LNa 2 S 2 o 3 ·5H 2 0. The amount of 20g / L Al weighs each component of the solution; first add 1 / 3 volume of water in the chemical milling tank, and then add NaOH, NaOH and NaOH under stirring conditions. 2 S, EDTA, and then add Na dissolved in water in advance 2 S 2 o 3 ·5H 2 O, TEA and pure aluminum, make up the remaining water, and stir well.

[0026] (2) Heat the chemical milling solution to 95°C, then grind, clean and degrease successively with 200#-2000# water sandpaper (10g / L NaOH+30g / LNa at 70°C 2 SiO 3 9H 2 2195 aluminum alloy after pretreatment such as washing in O+664 detergent system for 2 minutes), flowing water washing, light emitting (soaking in room temperature, 300g / L nitric acid solution for 5 minutes), flowing water washing, hot air drying at 60-80°C, etc. In , the milling treatment was carried out at a solution stirring speed of ...

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Abstract

The invention discloses an aluminum alloy chemical-milling solution and a milling method using the same. The milling method comprises the following steps of preparing the milling solution by utilizing right amounts of analytically pure NaOH, Na2S, triethanolamine, ethylenediamine tetraacetic acid, Na2S2O3, technical pure Al and deionized water; then, putting a pretreated duralumin or duralumin alloy into the solution, and performing milling treatment at a right temperature and a right stirring speed; and after reaching a milling depth, taking out a test-piece, checking a roughness of the surface of the aluminum alloy after suffering from the milling, and calculating a milling speed. The milling solution designed through the technical solution not only is applicable to a milling process of the duralumin or duralumin alloy, but also has the advantages of high milling speed and less surface roughness, and process parameters can be convenient to control.

Description

technical field [0001] The invention belongs to the field of metal processing, and more specifically relates to a new aluminum alloy chemical milling solution and milling process, which is mainly used for chemical milling processing of duralumin and superhard aluminum alloy. Background technique [0002] Chemical milling refers to immersing the part of the metal material to be processed in an appropriate chemical medium (solution). Due to the corrosion reaction between the surface of the workpiece and the chemical solution, the material is continuously dissolved and removed, thereby obtaining the required shape and shape of the part. size. Since chemical milling is a special processing technology with no tools, no chips, no stress, and no coordination problems between workpieces, it can process extra-thin, easily deformed, and large-area parts, and can reduce structural weight and process equipment. Shorten the production cycle. Therefore, the application range of chemical...

Claims

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Application Information

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IPC IPC(8): C23F1/36C23F1/04
CPCC23F1/04C23F1/36
Inventor 王吉会李娜李秋实
Owner TIANJIN UNIV
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