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

12 Cites 1 Cited by

AI-Extracted Technical Summary

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 ...

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

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.

Application Domain

Preparing sample for investigation

Technology Topic

Superficial massHigh surface +4

Image

Examples

Experimental program(1)

Example Embodiment

[0020] In the following, the present invention will be further described in detail for a method for preparing metallographic samples of spring parts, and the specific steps are as follows:

[0021] (1) Cutting: If the maximum diameter of the part is more than 30mm, it must be sampled by wire cutting, and the sampling position is the part to be inspected.

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

[0023] (3) The cold mounting powder Versocit-2Power and the corresponding cold mounting liquid Versocit-2liquid are configured in a certain ratio (the configuration ratio is 3.5:1, mass ratio) to make them fluid. After the solution is configured, mount the spring parts. When mounting, 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) Grind off the burrs around the sample with 180# alumina sandpaper, and rough-grind the surface to be observed. After grinding, the surface to be tested must be flat.

[0026] (6) Roughly grind the observed surface with 320# alumina along the grinding marks 90° until the previous grinding marks disappear.

[0027] (7) Roughly grind the observation surface with 500# aluminum oxide along the grinding mark 90°, until the previous grinding mark disappears.

[0028] (8) Along the grinding mark 90°, use 800# alumina to perform fine grinding on the observation surface until the previous grinding mark disappears.

[0029] (9) Along the grinding mark 90°, use 1000# alumina to perform fine grinding on the observation surface until the previous grinding mark disappears.

[0030] (10) Along the grinding mark 90°, use 1200# alumina to perform fine grinding on the observation surface until the previous grinding mark disappears.

[0031] (11) Finish polishing the sample with 5μm diamond suspension polishing solution.

[0032] (12) Finish polishing the sample with 3μm diamond suspension polishing solution.

[0033] (13) Side light inspection to observe whether there are polishing scratches on the polished surface of the sample; if there are, repeat steps (10),

[0034] (11) and (12), if not, proceed to one step.

[0035] (14) Rinse the sample with clean water, soak in alcohol for 2 minutes, and then blow dry the sample with heat.

[0036] (15) Use copper sulfate corrosion solution (CuSO 4 (5g)+HCL(20ml)+C 2 H 5 OH (100ml)] corrodes the sample; when the surface of the sample is dark gray and the grain size can be observed by the side light, stop the corrosion.

[0037] (16) Rinse the sample with clean water and soak in alcohol for 2 minutes, then blow dry the sample with heat to complete the sample preparation. .

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

Description & Claims & Application Information

We can also present the details of the Description, Claims and Application information to help users get a comprehensive understanding of the technical details of the patent, such as background art, summary of invention, brief description of drawings, description of embodiments, and other original content. On the other hand, users can also determine the specific scope of protection of the technology through the list of claims; as well as understand the changes in the life cycle of the technology with the presentation of the patent timeline. Login to view more.

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

Classification and recommendation of technical efficacy words

Tightly bound
Improve surface quality

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

AI-Extracted Technical Summary

Problems solved by technology

Abstract

Image

Examples

Example Embodiment

PUM

Description & Claims & Application Information

Similar technology patents

Cavity gas back pressure and temperature control device

Method for Repairing Display Device and Apparatus for Same

Method for eliminating surface cracks of ultra-wide high-nitrogen austenitic stainless steel medium thick plate

Preparation method of large slenderness ratio and high-toughness magnesium alloy capillary

Manufacturing method of thin-strip continuous casting high magnetic induction non-oriented silicon steel

Classification and recommendation of technical efficacy words

Preparation method of super-hydrophobic surface of glass

Touring time optimization method for tourist attractions

Preparation method for polydopamine-modified polyamide composite forward osmosis membrane

An electrode of quantum dot sensitization solar battery and the corresponding preparation method

Voice activity detection method as well as relevant device and equipment

Producing a flexographic printing plate

Oil-spraying sesame-scattering machine

Electrostatographic cleaning blade member and apparatus

Protective slag for Austenic stainless steel plate wand crystallizer

Method for processing composite shot blasting considering both surface peening and polishing