Method for accomplishing pseudo color reinforced metallographic microstructure based on digital image technology

A microstructure and digital image technology, which is applied in microscopes, image data processing, image data processing, etc., can solve the problems of unstable effects, environmental pollution, expensive equipment, etc., and achieve the effect of easy popularization, no pollution, and easy operation

Inactive Publication Date: 2006-12-13
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to overcome the existing color metallographic method or environmental pollution, expensive equipment; or cumbersome process, complex technology; or unstable effect, color confusion, difficult to be accepted and mastered by metallographic analysis personnel. A color metallographic identification method based on modern digital image technology that can be quickly converted on a computer, displayed accurately, has high phase contrast, is low in cost, easy to learn, easy to use, and easy to popularize

Method used

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  • Method for accomplishing pseudo color reinforced metallographic microstructure based on digital image technology
  • Method for accomplishing pseudo color reinforced metallographic microstructure based on digital image technology
  • Method for accomplishing pseudo color reinforced metallographic microstructure based on digital image technology

Examples

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Embodiment 1

[0055] Example 1: Figure 4a It is a grayscale image (500×) of the quenched structure of high-speed steel W18Cr4V. White massive carbides and white bone-like carbides (eutectic ledeburite) are distributed on the gray martensite-retained austenite matrix. There are quenched troostite and quenched sorbite (eutectoid product of 6 phases) in the form of black lumps, in which the gray difference between the martensite-retained austenite matrix and the carbide is small, and it is difficult to distinguish by gray; Figure 4b yes Figure 4a False-color image of , in which massive and skeletal primary carbides are rendered in dark red, martensite-retained austenite is rendered in light red, and the color difference is obvious; the blue area is black tissue, and the dark blue quenched The troostite and the lake-blue quenched sorbite are magically separated, and the orange dots are secondary carbides; the martensite-retained austenite is red at a rough glance, but there are still shades...

Embodiment 2

[0056] Example 2: Figure 5a It is a grayscale image (500×) of the quenched and burnt structure of Cr12 steel. Black acicular coarse tempered martensite is distributed on the gray coarse-grained austenite matrix, and white massive granular carbides are accumulated at the black grain boundaries. Eutectic ledeburite produced by overburning; Figure 5b Figure 5a The pseudo-color image of the blue grain boundary outlines the coarse austenite grains into an orange-red matrix, and the distributed eutectic ledeburite carbides turn into deep red, and the carbides and austenite are separated by color; on the matrix The distributed tempered martensite turns dark blue.

Embodiment 3

[0057] Example 3: Figure 6a It is a grayscale image (400×) of the quenched and medium-temperature tempered structure of cast steel ZG50 shrinkage porosity. On the gray tempered troostite matrix, there are white massive (quenched and heated) undissolved ferrites, and there are a lot of ( Unhardened) black mass quenched troostite and white reticular proeutectoid ferrite; Figure 6b yes Figure 6a False-color images of tempered troostite become lake blue, undissolved ferrite dark red, quenched troostite dark blue, pro-eutectoid ferrite red or orange; tempered troostite Body and quenched troostite are clearly distinguished in the false color image.

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Abstract

Disclosed is a method for enhancing metal phase microscopic structure with fake color. The method comprises designing a matching relation model of the metal phase gray grades versus fake colors; compiling a metal phase fake color system operated on computer; inputting the gray grades digital image of the metal phase microscopic structure into computer, selecting whether to perform gray histogram equalizing process according to the quality of the contrast of the original image gray grade; performing fake color conversion on the metal phase image with proper gray contrast, and forming and displaying the fake color digital image to distinguish and identify the metal phase microscopic structure.

Description

technical field [0001] The invention belongs to the technical field of metallographic analysis, and relates to a method for using digital image processing technology to convert the metallographic grayscale difference into a pseudo-color enhancement of the metallographic microstructure of the color tone difference. Phase pseudo-color system implementation. Background technique [0002] As we all know, metals are mostly composed of a variety of crystal materials (structures) with different types of crystal structures (phases). The microstructure analysis is generally carried out by observing the metal phases on the etched surface of metallographic samples and the morphology and grayscale of their tissue sections. identification. The surface of the metallographic sample must be ground and polished into a mirror surface, and then a suitable metallographic etchant is used to corrode the originally smooth surface into an uneven microscopic relief. , The grain boundary is most li...

Claims

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Application Information

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IPC IPC(8): G01N33/48G01N21/84G01B9/04G02B21/00G02B27/00G06T1/00G06K9/00G06F17/00
Inventor 厉树忠韩国才厉为刘进张锂张媛
Owner NORTHWEST NORMAL UNIVERSITY
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