Preparation method of aluminium alloy metallographic sample

A metallographic sample and aluminum alloy technology, which is applied in the field of aluminum alloy metallography, can solve the problems of difficulty in polishing, reducing the surface clarity of aluminum alloy metallographic samples, and easy to produce scratches on the surface, so as to improve the surface clarity. degree, shorten the preparation time, and eliminate the effect of partial phase dissolution or bulge

Inactive Publication Date: 2014-12-10
中山市江润金属压铸有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, due to the relatively low hardness of the aluminum alloy material, it is difficult to polish, and the surface of the aluminum alloy metallographic sample is prone to scratches, which reduces the clarity of the surface of the aluminum alloy metallographic sample.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0023] The invention discloses a method for preparing an aluminum alloy metallographic sample. The method comprises the following steps: the first step, sampling: cutting out the sample with a band sawing machine to obtain a preliminary sample; the second step, rough grinding: grinding with a grinding and polishing machine The initial sample is 30-40s, and the rough grinding sample is obtained, and the grinding and polishing machine adopts 320# water grinding sandpaper, and the rotating speed is 300-500r / min; the third step, fine grinding: use the grinding and polishing machine to grind the rough Grind the sample for 40 to 160 seconds to obtain a finely ground sample. The grinding and polishing machine uses 1500# metallographic sandpaper with a rotating speed of 1000 to 1500r / min; the fourth step, rough polishing: use a polishing machine to polish the finely ground sample until there is no Impurities are visible to the naked eye, and a rough polishing sample is obtained. The sp...

Embodiment 1

[0028] A method for preparing an aluminum alloy metallographic sample, comprising the steps of:

[0029] a Sampling: Cut out the initial sample with a length of 10 mm and a width of 10 mm with a band saw;

[0030] b Coarse grinding: Grinding the initial sample for 30 seconds with a grinding and polishing machine to obtain a rough grinding sample. The grinding and polishing machine uses 320# water grinding sandpaper, and the rotating speed is 300r / min;

[0031] c Fine grinding: use a grinding and polishing machine to grind the coarse grinding sample for 40 seconds to obtain a fine grinding sample. The grinding and polishing machine uses 1500# metallographic sandpaper, and the rotating speed is 1020r / min;

[0032] d Rough polishing: Use a polishing machine to polish the finely ground sample until no impurities are visible to the naked eye to obtain a rough polishing sample. The speed of the polishing machine is 1050r / min;

[0033] e Fine polishing 1: Use a polishing machine to ...

Embodiment 2

[0039] A method for preparing an aluminum alloy metallographic sample, comprising the steps of:

[0040] a Sampling: Cut out the initial sample with a length of 10 mm and a width of 10 mm with a band saw;

[0041] b Rough grinding: Grinding the initial sample for 35 seconds with a grinding and polishing machine to obtain a coarse grinding sample. The initial sample is rotated 45° for every 10 seconds of grinding.

[0042]c Fine grinding: use a grinding and polishing machine to grind the coarse grinding sample for 100s to obtain a fine grinding sample, and the coarse grinding sample is rotated 45° for every 20s of grinding, the grinding and polishing machine adopts 1500# metallographic sandpaper, and the rotating speed is 1220r / min;

[0043] d Rough polishing: the finely ground sample is sprayed with a polishing agent and a diamond spray with a particle size of 1.5 μm. Use a polishing machine to polish the finely ground sample until no impurities are visible to the naked eye to...

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PUM

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Abstract

The invention provides a preparation method of an aluminium alloy metallographic sample. The preparation method disclosed by the invention comprises the following steps of sampling, coarsely grinding, finely grinding, coarsely polishing, finely polishing for the first time, electrolyzing, finely polishing for the second time, performing acid pickling on the surface and corroding. Compared with related technologies, the preparation method of the aluminium alloy metallographic sample disclosed by the invention has the benefits that the preparation time of the aluminium alloy metallographic sample is shortened; the preparation efficiency is increased; scratches are effectively eliminated; the surface definition of the aluminium alloy metallographic sample is increased; the problem that a part of phases is corroded, lost or raised is effectively solved; false observation is effectively avoided; and the accuracy for metallographic analysis is high.

Description

【Technical field】 [0001] The invention relates to the technical field of aluminum alloy metallography, in particular to a method for preparing an aluminum alloy metallographic sample. 【Background technique】 [0002] The performance of aluminum alloy depends on its composition and microstructure, among which, the influence of microstructure on aluminum alloy is more direct. In the field of aluminum alloy material manufacturing, it is very common and effective to use high-magnification metallographic microscopes to observe the microstructure of aluminum alloys, especially the metamorphic effect. Engineers and technicians can predict and judge the properties of metals by observing and analyzing high-magnification imaging, and To analyze the causes of various failures and damages, this process of detection and analysis is usually called metallographic analysis. [0003] The most important work of metallographic analysis is to prepare metallographic samples, because once the met...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/32
Inventor 李贻成冯中慧
Owner 中山市江润金属压铸有限公司
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