Hypereutectic/hypoeutectic Al-Si alloy metamorphic grading method based on image processing technology

Abstract

The present invention discloses a hypereutectic / hypoeutectic Al-Si alloy metamorphic grading method based on an image processing technology. The method comprises the steps of: performing size uniformity, gray-scale processing, filtering processing, adaptive binarization processing, foreground and background conversion, filtering processing, cavity filling processing and area noise reduction in order to perform image processing, performing statistics of the total area of the communication areas of the foreground as a foreground area, and dividing the image into a hypereutectic alusil alloy or ahypoeutectic alusil alloy according to the ratio of the foreground area and the area of the image after processing; and performing metamorphic grading of the original image of the hypereutectic / hypoeutectic alusil alloy images. The hypereutectic / hypoeutectic Al-Si alloy metamorphic grading method performs accurate shape description and accurate pixel figure metering of an Al-Si alloy metallographic structure such as the eutecticum and primary silicon geometrical parameters and distribution to take as the classification grade standard so as to greatly improve the grading accuracy and the reliability in the actual application scene.

Description

Technical field [0001] The present invention relates to the technical field of image processing, in particular to a method for metamorphic / hypoeutectic Al-Si alloy modification and classification based on image processing technology. Background technique [0002] As a traditional metal material, cast aluminum alloy is widely used in aviation, aerospace, automobile, machinery and other industries due to its low density, high specific strength, and high thermal conductivity. Among them, Al-Si alloy has excellent mechanical properties and casting properties. , Good corrosion resistance, wear resistance and heat resistance and occupy a large proportion. There are coarse polygonal primary crystal silicon and long needle-like eutectic silicon in the cast Al-Si alloy structure, which severely split the alloy matrix, significantly reducing the mechanical properties, especially the plasticity and wear resistance, and the alloy's cutting performance . Therefore, improving the size and sh...

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Problems solved by technology

Therefore, this method of qualitative judgment is relatively subjective, and it is easy to introduce human errors in metallographic analysis.

At the same time, traditional quantitative metallographic methods mostly use manual calculations, relying on experimenters to eliminate objects that are not expected to be measured in the image based on experience, observe and measure with the naked eye, and then calculate and measure the results. Although it has the advantages of simplicity, economy and intuition, However, the measurement results are completely dependent on the experience and subjective judgment of the measurer, which will produce a large number of human errors, and the efficiency is extremely low, which cannot adapt to the rapid development of scientific research and production.

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