Preparation method of metallographic samples

A metallographic sample and metallographic detection technology, which is applied in the field of metallographic sample preparation, can solve the problems of affecting the smoothness of the detection surface, affecting the observation clarity, and easily generating bubbles in the mounting, so as to improve the polishing effect and shorten the Polishing time, the effect of shortening the grinding time

Inactive Publication Date: 2018-11-27
JIANGSU SCIENCE TEST TECHNOLOGY SERVICE CO LTD
View PDF11 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Metallographic analysis is a method for people to study the size, shape, distribution, quantity and properties of metal and alloy microstructures through metallographic microscopy. Due to the different research materials, the preparation methods of metallographic samples are various, and improper operations may form "pseudo-organizations" leading to erroneous analysis
In order to show the details of the structure clearly and not to cause any structural changes on the surface of the sample during the sample preparation process, the procedure can usually be divided into several main processes such as sampling, mounting, and polishing. The sample has been polished for a long time, and there are metal particles and grinding marks on the polished surface, which affects the smoothness of the detection surface and seriously affects the results of metallographic inspection.
[0003] Chinese Patent Publication No. CN 103759993 U discloses a method for preparing a metallographic sample. The specific operations include: first, sampling the metallographic sample; secondly, inlaying the metallographic sample; again, polishing the metallographic sample; Acid etching and rinsing of the surface to be polished of the phase sample: put the surface to be polished into the nitric acid alcohol solution for etching and rinse with water; finally, the metallographic sample is polished, although the nitric acid alcohol solution is added before polishing. The abrasive particles and metal abrasive particles left on the grinding surface will not leave obvious grinding marks on the polished sample, which improves the surface smoothness of the metallographic sample, but it is easy to generate air bubbles during the mounting process , which affects the clarity of observation. After the sample is mounted, it is difficult to remove the mounted sample from the mold, which may easily cause the mounted sample to be scrapped.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of metallographic samples

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0039] Embodiment: a kind of preparation method of metallographic sample, as figure 1 shown, including the following steps:

[0040] S1. Sampling: Cut samples at the edge of the sample and at the center of the sample respectively. The cutting direction should be parallel to the metallographic detection surface of the sample. According to the thickness of the sample, the sample should be treated as follows:

[0041] (1) When the thickness of the sample is less than 30mm, directly use the cut surface as the metallographic detection surface;

[0042] (2) When the thickness of the sample is between 30-50mm, cut the obtained sample into 2 samples at 2 / 3 of the thickness direction, and use the cut-off surface as the metallographic detection surface;

[0043] (3) When the thickness of the sample is greater than 50mm, cut the obtained sample into three equal parts in the thickness direction, and use the cut-off surface as the metallographic detection surface;

[0044] S2. Inlaying: ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
Login to view more

Abstract

The invention discloses a preparation method of metallographic samples. The preparation method includes the following steps: S1, a step of sampling, namely a step of cutting samples at the edge and center of a sample object; S2, a step of inlaying, namely a step of slowly guiding flows of colloid into an inlaying die through galvanized iron wires for curing; S3, a step of grinding; S4, a step of polishing; and S5, a step of corrosion, namely a step of corroding a metallographic detected surface with a corrosion solution. The method can effectively prevent bubbles from forming in the metallographic samples, improve the polishing effect, shorten the polishing time, facilitate metallographic observation of the metallographic detection surface, and improve the detection accuracy.

Description

technical field [0001] The invention belongs to the technical field of material detection, in particular to a method for preparing a metallographic sample. Background technique [0002] Metallographic analysis is a method for people to study the size, shape, distribution, quantity and properties of metal and alloy microstructures through metallographic microscopy. Due to the different research materials, the preparation methods of metallographic samples are various, and improper operations may form "pseudo-structures" and lead to erroneous analysis. In order to show the details of the structure clearly and not to cause any structural changes on the surface of the sample during the sample preparation process, the procedure can usually be divided into several main processes such as sampling, mounting, and polishing. The polishing time of the sample is longer, and there are metal particles and grinding marks on the polished surface, which affect the smoothness of the detection...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/06G01N1/32G01N1/36
CPCG01N1/06G01N1/32G01N1/36G01N2001/364
Inventor 朱烨林茂广邵江艳
Owner JIANGSU SCIENCE TEST TECHNOLOGY SERVICE CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products