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Polishing method for metallographic sample of aluminum alloy

A technology for metallographic samples and aluminum alloys, which is applied in the field of metallographic sample casting of aluminum alloys, can solve the problems of poor quality of metallographic pictures, waste of medicines, easy to be scratched, etc., and achieve less surface scratches and save time. , the effect of reducing the impact

Inactive Publication Date: 2014-12-24
WENZHOU RUIMING IND
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Problems solved by technology

[0002] At present, the sandpaper used in the metallographic sample throwing method of aluminum alloy before product testing is ordinary sandpaper, which is easy to be scratched; the throwing of the small sample (i.e. the body test bar) has to be inlaid and then thrown. , Need to add medicines, it takes more time and consumes more medicines
If you use ordinary sandpaper for rough polishing, and then use polishing cloth for fine polishing, it will take about 30 minutes to polish the sample, and the quality of the metallographic picture produced by polishing is poor and there are many scratches on the surface

Method used

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Effect test

Embodiment Construction

[0006] The metallographic sample throwing method of the aluminum alloy used in the aluminum alloy casting industry is as follows: first, the metallographic sample of the aluminum alloy is roughly thrown on the water sandpaper, and when the water sandpaper is used, the sandpaper must be soaked with water, In the process of throwing, water needs to be added continuously, generally throwing for 3-5 minutes; then use a small sample (a test rod with a diameter of 6mm) to throw a metal mold (select a small cylindrical mold according to the size of the test rod—the material is steel) on the metallographic sample (the metal mold needs to be parallel to the sample and clamped), usually for 3-5 minutes; Fine polishing (generally 4-6 minutes), metallographic polishing agent (generally diamond spray polishing agent) can be sprayed during the polishing process to make the surface of the sample polished smooth; finally, magnesium oxide solution is used for continuous polishing (generally It...

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Abstract

The invention discloses a polishing method for a metallographic sample of aluminum alloy in the aluminum alloy casting industry. The polishing method comprises the steps of firstly, performing coarse polishing on a metallographic sample of aluminum alloy on a piece of waterproof abrasive paper, wherein when the waterproof abrasive paper is used, the abrasive paper is required to be soaked with water, and water is continuously added in a polishing process; performing coarse polishing on the metallographic sample by virtue of a metal die for polishing a small-size test piece, and then performing fine polishing on a polished fabric; and finally, performing continuous polishing with a magnesium oxide solution. According to the polishing method, the metal die instead of chemicals is directly used, so that the technology is simplified, the time is shortened, and the polishing efficiency is improved; by the use of the magnesium oxide solution for polishing, the surface polishing quality of a metallographic sample picture is obviously improved, the number of scratches on the surface is relatively small, and an influence of bad peripheral factors on the test sample is weakened, so that an internal tissue structure of the metallographic sample and defects in the metallographic sample can be conveniently observed, a product can be improved, and the quality of the product is improved.

Description

technical field [0001] The invention relates to a metallographic throwing method of a metal, in particular to a metallographic sample throwing method of an aluminum alloy. Background technique [0002] At present, the sandpaper used in the metallographic sample throwing method of aluminum alloy before product testing is ordinary sandpaper, which is easy to be scratched; the throwing of the small sample (i.e. the body test rod) has to be inlaid and then thrown. 1. It needs to add medicines, which takes more time and consumes more medicines. If ordinary sandpaper is used for rough polishing, and then polishing cloth is used for fine polishing, it takes about 30 minutes to polish the sample, and the quality of the metallographic picture produced by polishing is poor and there are many scratches on the surface. Contents of the invention [0003] The object of the present invention is to overcome the above-mentioned deficiencies, and provide a metallographic sample throwing me...

Claims

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Application Information

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IPC IPC(8): G01N1/32
Inventor 叶锦瑞韩玉明杨秋菊吴程陈自江
Owner WENZHOU RUIMING IND
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