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Sample preparation method of high-purity aluminum bus metallographic sample

A busbar gold and sample technology is applied in the field of sample preparation of high-purity aluminum busbar metallographic samples, and achieves the effect of simple sample preparation method, solving the difficulty of grain boundary corrosion, and avoiding structure change.

Inactive Publication Date: 2019-09-06
XINJIANG JOINWORLD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The object of the present invention is to provide a sample preparation method for metallographic samples of high-purity aluminum busbars, which solves the metallographic sample preparation, electrolytic polishing and anode coating of extruded high-purity aluminum busbars with a purity of more than 99.998% for microalloying and technical problems in the erosion process

Method used

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  • Sample preparation method of high-purity aluminum bus metallographic sample
  • Sample preparation method of high-purity aluminum bus metallographic sample
  • Sample preparation method of high-purity aluminum bus metallographic sample

Examples

Experimental program
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Effect test

Embodiment 1

[0075] The specific operation steps are as follows:

[0076] (1) Sample preparation: the bus bar has a high-purity aluminum base with a purity of 99.998 or more, with 40-60ppm Ni added, and Fe, Si, and Cu elements less than 10ppm (ug / g);

[0077] Cut two sections of busbar, the diameter of which is 5mm. The length of the first section is 50mm, and the length of the second section is 70mm. After bending the second section of bus bar 90° along the length of 20mm, place it upright with the first section in the cold mounting mold (such as figure 2 shown). Cast the cold mounting solution into the mold and take it out after the solution is solidified for grinding sample preparation.

[0078] (2) Coarse grinding: place 400# silicon carbide water sandpaper on the polishing machine, and set the speed at 300 rpm. Roughly grind the cold-mounted sample with water on a polishing machine until the height is close to the diameter of the generatrix of the bending section, that is, the bo...

Embodiment 2

[0086] The specific operation steps are as follows:

[0087] (1) Metallographic sample preparation of high-purity aluminum busbar: high-purity aluminum-based busbar with a purity of more than 99.998, added with 40-60ppmNi elements, and containing less than 10ppm (ug / g) of Fe, Si, and Cu elements;

[0088] Cut two sections of busbar, the diameter of which is 6mm. The length of the first section is 60mm, and the length of the second section is 80mm. After bending the second section of busbar 90° along the length of 20mm, place it vertically in the cold mounting mold at the same time as the first section (such as figure 2 shown). Cast the cold mounting solution into the mold and take it out after the solution is solidified for grinding sample preparation.

[0089] (2) Coarse grinding: place 400# silicon carbide water sandpaper on the polishing machine, and set the speed at 350 rpm. Roughly grind the cold-mounted sample with water on a polishing machine until the height is clos...

Embodiment 3

[0097] The specific operation steps are as follows:

[0098] (1) Sample preparation: the bus bar has a high-purity aluminum base with a purity of 99.998 or more, with 40-60ppm Ni added, and Fe, Si, and Cu elements less than 10ppm (ug / g);

[0099] Cut two sections of busbar, the diameter of which is 3mm. The length of the first section is 55mm, and the length of the second section is 75mm. After bending the second section of busbar 90° along the length of 20mm, place it vertically in the cold mounting mold at the same time as the first section (such as figure 2 shown). Cast the cold mounting solution into the mold and take it out after the solution is solidified for grinding sample preparation.

[0100] (2) Coarse grinding: place 400# silicon carbide water sandpaper on the polishing machine, and set the speed at 250 rpm. Roughly grind the cold-mounted sample with water on a polishing machine until the height is close to the diameter of the generatrix of the bending section...

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Abstract

The invention relates to a sample preparation method of a high-purity aluminum bus metallographic sample. The sample preparation method comprises: step one, preparing a sample by using a cold mosaic method; step two, carrying out rough grinding; step three, carrying out fine grinding; step four, carrying out electrolytic polishing; step five, carrying out anode coating or electrolytic etching treatment on the sample after electrolytic polishing; and step six, carrying out tissue organization by using an optical microscope. The sample preparation method is suitable for a high-purity aluminum-based sample with the purity of more than 99.998%. The surface reaches a mirror surface effect by electrolytic polishing. The e grain boundary corrosion of the high-purity aluminum is accelerated by cooperating with the anode coating or electrolytic erosion process to realize a good corrosion effect; the grain boundary of the prepared metallographic sample is clear; the contrast comparison of the coating sample is clear; and a problem of difficult grain boundary corrosion of the high-purity aluminum bus is solved.

Description

technical field [0001] The invention belongs to the technical field of metallographic sample preparation, and in particular relates to a method for preparing a metallographic sample of a high-purity aluminum busbar. Background technique [0002] Metallography is a discipline that studies the organization of metal materials. Early metallography mainly carried out microstructure analysis with the help of optical microscope, and now it has been developed to use modern electron microscope technology for research. However, optical microscopes are still commonly used metallographic observation equipment in most colleges, research institutions and factories. High-purity aluminum and high-purity aluminum-based alloys with a purity of more than 99.998% have less impurities, good corrosion resistance, and difficult grain boundary corrosion during metallographic sample preparation. Moreover, high-purity aluminum and high-purity aluminum-based alloys are soft, and scratches are easily...

Claims

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Application Information

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IPC IPC(8): G01N21/84G01N1/28G01N1/32G01N1/36
CPCG01N1/286G01N1/32G01N1/36G01N21/84G01N2001/366
Inventor 马小红徐亚军乔晶王秀娟张丽娟
Owner XINJIANG JOINWORLD CO LTD
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