Metallographic sample preparation method of aluminum alloy

A technology for metallographic sample preparation and aluminum alloy, which is applied in the preparation, sampling, and measuring devices of samples for testing, and can solve problems such as the lack of a guiding sample preparation theory and the inapplicability of aluminum alloys

Pending Publication Date: 2021-12-03
CHINALCO MATERIALS APPL RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Patent CN110672398A discloses an automatic grinding and polishing sample preparation process for titanium alloys, but does not propose a guiding sample preparation theory, and is not suitable for aluminum alloys with relatively low hardness

Method used

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  • Metallographic sample preparation method of aluminum alloy
  • Metallographic sample preparation method of aluminum alloy
  • Metallographic sample preparation method of aluminum alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The 8021-H112 state (Hv=32), 1050-O state (Hv=22) aluminum alloys were subjected to cold mounting sample preparation, and the specifications were obtained as Samples with a height of 20 mm, and then the samples after cold mounting were subjected to grinding and polishing experiments using an automatic grinding and polishing machine.

[0036] First, use an automatic grinding and polishing machine for three-stage automatic grinding, that is, use 400 mesh, 800 mesh and 2000 mesh water-grinding sandpaper for automatic grinding step by step. Then, use an automatic polishing machine for three-stage automatic polishing, that is, use a polishing liquid and a polishing cloth with a 9 μm abrasive grain, a polishing liquid and a polishing cloth with a 3 μm abrasive grain, and a polishing liquid and a polishing cloth with a 0.02 μm abrasive grain. Perform automatic polishing. Finally, the polished aluminum alloy samples were rinsed with water and absolute ethanol in turn and drie...

Embodiment 2

[0040] The 6061-T6 state (Hv=75), 6013-homogeneous state (Hv=71), 6082-cast state (Hv=80), 6110-cast state (Hv=60), 5754-O state (Hv=60 ), 3004-O state (Hv=54), 7075-cast state (Hv=72), ZL101A-cast state (Hv=93) aluminum alloys for cold mounting sample preparation, and the specifications are Samples with a height of 20 mm, and then the samples after cold mounting were subjected to grinding and polishing experiments using an automatic grinding and polishing machine.

[0041] First, use an automatic grinding and polishing machine for three-stage automatic grinding, that is, use 400 mesh, 800 mesh and 2000 mesh water-grinding sandpaper for automatic grinding step by step. Then, use an automatic polishing machine for three-stage automatic polishing, that is, use a polishing liquid and a polishing cloth with a 9 μm abrasive grain, a polishing liquid and a polishing cloth with a 3 μm abrasive grain, and a polishing liquid and a polishing cloth with a 0.02 μm abrasive grain. Perfor...

Embodiment 3

[0045] The 7075-H112 state (Hv=169), 2524-T3 state (Hv=149), 6110-T6 state (Hv=120) aluminum alloys were subjected to cold mounting sample preparation, and the specifications were obtained as Samples with a height of 20 mm, and then the samples after cold mounting were subjected to grinding and polishing experiments using an automatic grinding and polishing machine.

[0046] First, use an automatic grinding and polishing machine for three-stage automatic grinding, that is, use 400 mesh, 800 mesh and 2000 mesh water-grinding sandpaper for automatic grinding step by step. Then, use an automatic polishing machine for three-stage automatic polishing, that is, use a polishing liquid and a polishing cloth with a 9 μm abrasive grain, a polishing liquid and a polishing cloth with a 3 μm abrasive grain, and a polishing liquid and a polishing cloth with a 0.02 μm abrasive grain. Perform automatic polishing. Finally, the polished aluminum alloy samples were rinsed with water and absolu...

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Abstract

The invention discloses a metallographic sample preparation method of aluminum alloy. The Vickers hardness of the aluminum alloy is in a range of 10-200, and the automatic grinding sample preparation process parameters of the aluminum alloy are as follows: the loading load is 5-20 N, the rotating speed of a moving head is 40-60 rpm, the rotating speed of a grinding disc is 150-200 rpm, the grinding time is 1-3 min, 400-mesh, 800-mesh and 2000-mesh waterproof abrasive paper is used in a matched manner, and water is added for step-by-step grinding; the technological parameters of automatic polishing and sample preparation are as follows: the loading load is 15-30N, the rotating speed of a moving head is 40-60rpm, the rotating speed of a grinding disc is 100-150rpm, the polishing time is 3-15min, and polishing liquid and polishing cloth with 9 mu m, 3 mu m and 0.02 mu m abrasive particles are used in a matched manner to perform step-by-step polishing. According to the method provided by the invention, the problems of low sample preparation efficiency, unstable sample preparation quality and high consumption of valuable consumables caused by no matched guide process when various marks of aluminum alloys are subjected to sample preparation by using an automatic grinding and polishing machine are solved, and the aluminum alloy metallographic samples can be prepared with high efficiency and high quality.

Description

technical field [0001] The invention relates to the technical field of metallographic sample preparation, in particular to a method for metallographic sample preparation of aluminum alloys. Background technique [0002] Metallographic sample preparation of aluminum alloy is an important basic test before microstructure observation of aluminum alloy. The quality and efficiency of sample preparation have a crucial impact on the progress of scientific research. Traditional aluminum alloy metallographic sample preparation needs manual grinding and polishing step by step with sandpaper, polishing paste and polishing cloth. The effect depends heavily on personal experience, and it takes a lot of energy to prepare a large number of samples. [0003] With the continuous advancement of technology, metallographic sample preparation is also moving from manual to automatic. The new generation of metallographic sample preparation equipment represented by automatic grinding and polishin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28G01N1/32
CPCG01N1/286G01N1/32G01N2001/2866
Inventor 杨书瑜韩逸朱冉冉钱维锋张惠琳
Owner CHINALCO MATERIALS APPL RES INST CO LTD
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