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

Gold phase tissue method for displaying martensite-austenite phase of steel

A technology of metallographic structure and martensite, which is applied in the field of steel materials, can solve the problems of poor imaging effect, inability to effectively establish the correlation between structure and performance, and inability to display the structure and percentage of each phase of the structure, and achieve a significant Remarkable image effect, high safety, simple operation

Inactive Publication Date: 2019-04-09
BAOTOU IRON & STEEL GRP
View PDF2 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is that the method for displaying the metallographic structure of the steel martensite-austenite phase in the prior art has poor imaging effect and cannot display the structure of each phase in the structure and percentage content, it is impossible to effectively establish the correlation between organization and performance

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
  • Gold phase tissue method for displaying martensite-austenite phase of steel
  • Gold phase tissue method for displaying martensite-austenite phase of steel
  • Gold phase tissue method for displaying martensite-austenite phase of steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The weight percentage is 0.8~1.2% Na 2 S 2 o 5 .5H 2 O solution and picric acid alcohol solution with a weight percentage of 2% to 3% are mixed at a volume ratio of 1:1 to obtain a corrosion solution; the steel sample containing the metallographic structure of Q550D is polished, and the sample is flattened with a grinder The surface is finally ground with coarse to fine sandpaper (sandpaper numbers are 240, 320, 500, 600 in turn), and after grinding, use metallographic polishing agent (the main component is diamond) to polish on the polishing machine, and water to moisten The wet agent is sprayed on the flannelette for wetting, and the steel sample is pressed and polished on the flannelette. The mechanical polishing time is 1 to 10 minutes; the polished steel sample is immersed in the corrosive agent in parallel, and the polished surface (for metallographic observation) Surface) facing down, the steel sample is immersed in the corrosive agent to a depth of 2 to 4mm, ...

Embodiment 2

[0025] The weight percentage is 0.8~1.2% Na 2 S 2 o 5 .5H 2 O solution and picric acid alcohol solution with a weight percentage of 2% to 3% are mixed at a volume ratio of 1:1 to obtain a corrosion solution; the steel sample containing the X80 metallographic structure is polished, and the sample is flattened with a grinder The surface is finally ground with coarse to fine sandpaper (sandpaper numbers are 240, 320, 500, 600 in turn), and after grinding, use metallographic polishing agent (the main component is diamond) to polish on the polishing machine, and water to moisten The wet agent is sprayed on the flannelette for wetting, and the steel sample is pressed and polished on the flannelette. The mechanical polishing time is 1 to 10 minutes; the polished steel sample is immersed in the corrosive agent in parallel, and the polished surface (for metallographic observation) Surface) facing down, the steel sample is immersed in the corrosive agent to a depth of 2 to 4mm, dippe...

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
depthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a gold phase tissue method for displaying martensite-austenite phases of steel. The method comprises the following steps of: immersing a to-be-tested sample into a mixed corrosive liquid of a certain proportion of Na<2>S<2>O<5>.5H<2>O aqueous solution and a picric acid alcohol solution; washing and blow-drying; and observing the tissue morphology of the sample by a microscope. According to the gold phase tissue method for displaying the martensite-austenite phases of the steel, the multiphase tissue in the steel particularly the M-A (Martensite Austenite island) islandsphases in the tissue can be corroded by using a specific steel sample corrosion liquid; the visualization effect is remarkable, and the analysis of the distribution, the shape, and the size of the M-A islands in the steel are very good; and quantitative analysis can be performed, the correlation between the percentage content of the multiphase tissue and the steel performance can be effectively established, and the control of the actual production is facilitated.

Description

technical field [0001] The invention relates to the technical field of iron and steel materials, in particular to a metallographic structure method for displaying the martensite-austenite phase of iron and steel. Background technique [0002] With the development of material science, the requirements for the analysis of material microstructure are getting higher and higher, and people's eyes distort many real tissue states when identifying phases. The internal structure of metal materials is directly and closely related to material properties such as hardness, strength, and ductility, and metallographic observation is the most effective method for studying the internal structure of metal materials. The amount of phase content in the structure will directly affect the final performance of the steel, so it is very necessary to display the amount of hard phase and soft phase in the structure. The quantitative evaluation of the hard phase in multi-phase steel is a deeper researc...

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): G01N21/84
CPCG01N21/84G01N2021/8411
Inventor 冯岩青涛雅卜向东宋振东
Owner BAOTOU IRON & STEEL GRP
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