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Method for preparing metallographic specimen of spring-like parts

A technology for metallographic samples and parts, applied in the field of testing and testing, can solve problems such as backwater, sample contamination, and the operator's inability to inspect the microstructure normally, and achieve the effect of high surface quality and tight bonding

Active Publication Date: 2018-03-30
CHINA HANGFA GUIZHOU LIYANG AVIATION POWER CO LTD
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Problems solved by technology

Due to the presence of microscopic pores in the hot-mounted sample, it is easy to cause the phenomenon of "water return" during the observation process after sample preparation, resulting in contamination of the sample, making it impossible for the operator to check its microstructure normally; at the same time, due to the current preparation method The sample preparation process only uses 1000# sandpaper for grinding, so in the subsequent polishing process, there will be a phenomenon that scratches cannot be completely removed

Method used

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  • Method for preparing metallographic specimen of spring-like parts

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Embodiment Construction

[0020] Below the present invention is described in further detail a kind of preparation method of metallographic sample of spring class parts, and its concrete steps are as follows:

[0021] (1) Cutting: If the maximum diameter of the part is > 30mm, wire cutting must be used for sampling, and the sampling position is the position to be inspected of the part.

[0022] (2) Clean the sample after cutting with alcohol and dry it with hot air.

[0023] (3) Configure the cold mounting powder Versocit-2Power and the corresponding cold mounting liquid Versocit-2liquid according to a certain ratio (the configuration ratio is 3.5:1, mass ratio) to make it fluid. After the solution is prepared, the sample mounting of the spring parts is carried out. When mounting the sample, the surface to be tested is placed below.

[0024] (4) After the cold-mounted sample is completely solidified, take out the sample and mark the sample accordingly.

[0025] (5) Use 180# alumina sandpaper to polish...

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Abstract

The invention discloses a method for preparing a metallographic specimen of spring-like parts. The method comprises the following steps: inlaying the specimen, grinding, polishing and corroding, wherein the specimen is in a cold inlaid manner, and 1200# silicon carbide abrasive paper is adopted in the final accurate grinding process during grinding. The metallographic specimen of spring-like partsprepared by the method disclosed by the invention has high surface quality, a 'backwater' phenomenon is avoided, any microscopic pore does not exist, the parts are tightly combined with the inlay, the working efficiency can be indirectly improved, and the truth of the detection result is improved.

Description

technical field [0001] The invention belongs to the technical field of testing and testing, and in particular relates to a method for preparing metallographic samples of spring parts. Background technique [0002] Springs are mainly used in the accessory system of the engine. Due to their complex structure and high hardness, it is difficult to prepare metallographic samples. At present, the method of preparing metallographic samples of spring parts is mainly to prepare samples by hot-mounting epoxy resin, then grind and polish the samples, and finally corrode. Due to the presence of microscopic pores in the hot-mounted sample, it is easy to cause the phenomenon of "water return" during the observation process after sample preparation, resulting in contamination of the sample, making it impossible for the operator to check its microstructure normally; at the same time, due to the current preparation method The sample preparation process only involves grinding with 1000# sand...

Claims

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Application Information

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IPC IPC(8): G01N1/36G01N1/28G01N1/32G01N1/30G01N1/34
CPCG01N1/286G01N1/30G01N1/32G01N1/34G01N1/36G01N2001/364
Inventor 熊勇陈昌达肖青云李巍
Owner CHINA HANGFA GUIZHOU LIYANG AVIATION POWER CO LTD
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