Method for detecting carbide in steel

A carbide and steel technology, applied in the direction of electrochemical variables of materials, etc., can solve the problems of long life evaluation time of materials, complicated experimental devices, and unsuitable for industrial field detection, etc., to achieve rapid testing and result analysis, simple sample preparation, and testing. fast effect

Active Publication Date: 2020-12-25
SUN YAT SEN UNIV
View PDF1 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The detection method of the present invention can solve the problems that other detection methods have a long time f

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
  • Method for detecting carbide in steel
  • Method for detecting carbide in steel
  • Method for detecting carbide in steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0050] The content of the present invention will be described in further detail below through specific examples. Unless otherwise specified, the raw materials, reagents or devices used in the examples can be obtained from conventional commercial channels, or can be obtained through prior art methods. Unless otherwise specified, experiments or testing methods are conventional methods in the art.

[0051] Taking the detection of carbide content in P92 heat-resistant steel tempered at different times as an example, the detection method of the embodiment of the present invention will be described below.

[0052] In order to illustrate that the tempered samples contain carbides, the microscopic morphology of the samples tempered at different times was observed by scanning electron microscopy (SEM). P92 steel samples for comparison. attached figure 1 Shown is the scanning electron micrograph of carbide-containing P92, with figure 2 Shown is the SEM image of carbide-free P92.

...

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
Areaaaaaaaaaaa
Login to view more

Abstract

The invention discloses a method for detecting carbide in steel. The method comprises the following steps of 1), preparing a steel sample into a working electrode, and then assembling an electrochemical testing device of a three-electrode system; 2), placing the working electrode in alkali liquor by adopting the electrochemical testing device, and carrying out potentiodynamic polarization scanningto obtain a polarization curve of the current density to the electrode potential; 3), drawing a current density and polarization time curve according to the polarization curve, integrating peaks on the current density and polarization time curve, and calculating the dissolved electric quantity of the carbide in the steel sample according to the integral area of the peaks; and 4), calculating thecontent of the carbide in the steel sample according to the dissolved electric quantity of the carbide. The method for detecting the carbide in the steel has the advantages of simple sample preparation, high test speed, small damage to the surface of the sample and the like, and the detection equipment is small in size, convenient to carry and suitable for field detection of the carbide content ofthe steel.

Description

technical field [0001] The invention relates to the technical field of material detection, in particular to a method for detecting carbides in steel. Background technique [0002] The ultra-supercritical unit and its power generation technology is one of the mature and advanced clean coal power generation technologies in the world, and it is also an important direction in the current clean coal power generation technology. Due to its excellent structural stability and good high-temperature strength, steel has become one of the best candidate materials for thick-walled parts of ultra-supercritical units, and has been widely used in ultra-supercritical units that have been put into production and are under construction. Due to the long-term operation in the harsh environment of high temperature, the material will inevitably produce different degrees of creep damage. Creep will cause changes in the microstructure of metal materials, which will cause plastic deformation of the ...

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
IPC IPC(8): G01N27/26
CPCG01N27/26
Inventor 徐健颜佳音袁随吴云龙郭琦
Owner SUN YAT SEN UNIV
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

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap