Metallographic specimen preparation method

A metallographic sample and nitrous alcohol technology, which is applied in the field of material microstructure detection, can solve the problems of wear marks on the polished surface, influence of metallographic inspection results, poor polishing effect, etc., so as to achieve short polishing time and improve polishing effect. , the preparation method is simple and quick effect

Active Publication Date: 2014-04-30
GUANGXI YUCHAI MASCH CO LTD
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Problems solved by technology

The conventional method of polishing the sample is not good. Although the polishing time is long, there are still visible and obvious wear marks on the polished surface.
Due to the existence of wear marks on the sample, it will affect the judgment of metallographic inspection results

Method used

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  • Metallographic specimen preparation method

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Embodiment Construction

[0018] A specific embodiment of the present invention will be described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiment. It should be understood that the "upper", "lower", "left", "right", "front" and "reverse" mentioned in the following embodiments of the present invention are all based on the directions shown in the figures, These words used to limit the direction are only for convenience of description, and do not mean to limit the specific technical solution of the present invention.

[0019] The metallographic sample preparation method of the present invention is simple and fast. By adding nitric acid alcohol solution etching process before polishing, the abrasive particles and metal abrasive particles left on the grinding surface are dissolved, and the sample after polishing will not leave obvious The grinding marks improve the polishing...

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Abstract

The invention discloses a metallographic specimen preparation method. The metallographic specimen preparation method particularly comprises the following steps: firstly, sampling a metallographic specimen; secondly, inserting the metallographic specimen; thirdly, polishing the metallographic specimen; fourthly, carrying out acid etching and washing on a to-be-polished surface of the metallographic specimen, namely putting the to-be-polished surface into nital for etching and washing with water; and finally, polishing the metallographic specimen. The metallographic specimen preparation method is simple and rapid; abrasive material particles and metal abrasive dust particles on the polished surface are dissolved by adding the nital etching procedure before polishing; obvious polishing marks cannot be left on the polished specimen, and thus the polishing effect of the metallographic specimen is improved; the polishing time of the metallographic specimen is shorter than before, and the polishing efficiency is improved.

Description

technical field [0001] The invention relates to the field of material microstructure detection, in particular to a method for preparing a metallographic sample. Background technique [0002] The inspection of metallographic microstructure needs to be polished to form a metallographic sample before inspection. The quality of the polishing directly affects the inspection effect. The purpose of sample polishing is to remove the grinding marks left on the grinding surface of the sample, Get a mirror-like surface ready for displaying tissue. [0003] The usual metallographic sample preparation process is: sample sampling (cutting) - sample inlay (when the sample is too small or has special requirements) - sample polishing - sample polishing. After the above several processes, the inspection of the metallographic structure of the sample can only be carried out when the surface to be inspected reaches the brightness. The polishing effect of the sample in this conventional method ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28
Inventor 杨美全马晓霞谢卫军曾泳霖
Owner GUANGXI YUCHAI MASCH CO LTD
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