Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Low-density steel original austenite grain boundary display method and application

A technology of austenitic grain boundaries and low-density steel, which is applied in the preparation of test samples, etc., can solve problems such as unsatisfactory display effects, achieve improved display effects, low requirements for corrosion reagents and corrosion parameters, and are very easy to implement Effect

Pending Publication Date: 2021-02-02
QINGDAO UNIV
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned technologies are currently able to display the grain boundaries of some conventional traditional steel materials very well, but for some new steels, their corrosion resistance is significantly different from that of traditional steels. These traditional techniques for displaying original austenite grain boundaries often show The effect is not ideal, and new etching techniques still need to be explored to reveal grain boundaries

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
  • Low-density steel original austenite grain boundary display method and application
  • Low-density steel original austenite grain boundary display method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The method for displaying prior austenite grain boundaries in low-density steel, the specific steps are as follows:

[0032] (1) Put tin in a crucible, heat and keep warm for an appropriate time to melt all the tin;

[0033] (2) Polish one of the planes of the steel sample to be polished on 240#, 600#, 1000# metallographic sandpaper from coarse to fine, and keep a certain angle with the pattern plane when polishing 240#; replace the sandpaper each time Before ensuring that there is no scratch on the surface of the sample perpendicular to the polishing direction, when changing the sandpaper, the sample is rotated at an angle of 90 degrees, after being polished by 1000# sandpaper, water grinding is carried out on 1500# sandpaper, and after polishing by 1500# sandpaper, it is polished and polished. Blow dry until there are no scratches or stains;

[0034] (3) Quickly immerse the polished sample in step (2) in molten tin and keep it warm at 1050°C for 2 hours, then take ou...

Embodiment 2

[0038] The method for displaying prior austenite grain boundaries in low-density steel, the specific steps are as follows:

[0039] (1) Put tin in a crucible, heat and keep warm for an appropriate time to melt all the tin;

[0040] (2) Polish one of the planes of the steel sample to be polished on 240#, 600#, 1000# metallographic sandpaper from coarse to fine, and keep a certain angle with the pattern plane when polishing 240#; replace the sandpaper each time Before ensuring that there is no scratch on the surface of the sample perpendicular to the polishing direction, when changing the sandpaper, the sample is rotated at an angle of 90 degrees, after being polished by 1000# sandpaper, water grinding is carried out on 1500# sandpaper, and after polishing by 1500# sandpaper, it is polished and polished. Blow dry until there are no scratches or stains;

[0041] (3) Quickly immerse the polished sample in step (2) into molten tin and keep it warm at 1050°C for 2.5 hours, then tak...

Embodiment 3

[0045] The method for displaying prior austenite grain boundaries in low-density steel, the specific steps are as follows:

[0046] (1) Put tin in a crucible, heat and keep warm for an appropriate time to melt all the tin;

[0047] (2) Polish one of the planes of the steel sample to be polished on 240#, 600#, 1000# metallographic sandpaper from coarse to fine, and keep a certain angle with the pattern plane when polishing with 300#; replace the sandpaper each time Before ensuring that there is no scratch on the surface of the sample perpendicular to the polishing direction, when changing the sandpaper, the sample is rotated at an angle of 90 degrees, after being polished by 1000# sandpaper, water grinding is carried out on 1500# sandpaper, and after polishing by 1500# sandpaper, it is polished and polished. Blow dry until there are no scratches or stains;

[0048] (3) Quickly immerse the polished sample in step (2) in molten tin and keep it warm at 1100°C for 2 hours, then ta...

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

No PUM Login to View More

Abstract

The invention belongs to the technical field of metallographic preparation, and relates to a low-density steel original austenite grain boundary display method and application. The method comprises the following specific steps: immersing a polished steel sample into molten tin, carrying out heat preservation for austenitizing treatment, taking out the steel sample, quenching to room temperature, and removing tin on the surface of the steel sample; and carrying out corrosion treatment on the tin-removed steel sample by using a nitric acid alcohol solution, and carrying out surface cleaning to obtain the sample for displaying the original austenite grain boundary. The display of the original austenite grain boundary is clearer, and the method has a better effect on non-corrosion-resistant steel such as Fe-Mn-Al-C-X low-density steel and the like.

Description

technical field [0001] The invention belongs to the technical field of metallographic preparation, and in particular relates to a method and application of a low-density steel original austenite grain boundary display method. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] The size of prior austenite grains has a very important influence on the mechanical properties of steel, so the display technology of prior austenite grain boundaries has always been one of the key research tasks in the field of steel. It is of great significance to explore how to quickly and clearly display the prior austenite grain boundaries for the study of steel. [0004] At present, the corrosion...

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): G01N1/32G01N1/34G01N1/44
CPCG01N1/32G01N1/34G01N1/44
Inventor 李俊儒郭芳辉张鹏飞王海龙杨国何田李欣琳程联军
Owner QINGDAO UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com