Quantitative detection method for primary silicon phases in hypereutectic aluminum-silicon alloy

Abstract

The invention discloses a quantitative detection method for primary silicon phases in a hypereutectic aluminum-silicon alloy. The method comprises the steps that a test sample to be detected is intercepted, ground flush and polished, and then images of the whole polished surface are continuously and exhaustively collected with overlapping in sequence by means of a camera accompanied with a microscope, the images are spliced by means of image software in sequence, overlapping is processed, and the area of each primary silicon phase is clicked on by means of a magic wand tool; all the primary silicon phases in the whole section are saved in the same image, statistics and quantitative processing to the primary silicon phases are conducted by using image processing software and data processing and analysis software, thus the size information of each primary silicon phase, the statistical information of all the primary silicon phases and the total area of the whole detected section are obtained, and the content of the primary silicon phases is the ratio of the total area of the primary silicon phases to the total area of the whole detected section. The method achieves quantitative detection of the primary silicon phases in the whole section to be detected, and is more accurate in detection result.

Description

technical field [0001] The invention relates to a quantitative detection method for primary silicon phases in a hypereutectic aluminum-silicon alloy, and belongs to the technical field of quantitative detection of metallographic structures. Background technique [0002] Hypereutectic Al-Si alloy has excellent physical and chemical properties, such as light density, low thermal expansion coefficient, good dimensional stability, thermal conductivity, wear resistance, corrosion resistance, etc., and is often used to manufacture lightweight wear-resistant parts. , transportation, machining and other fields, especially in the automotive industry are widely used. During the solidification process of the hypereutectic aluminum-silicon alloy, due to liquid shrinkage and solidification shrinkage, large and concentrated shrinkage cavities or small and scattered shrinkage porosity are formed at the final solidification part of the casting. Before smelting, the hypereutectic aluminum-s...

AI Technical Summary

Problems solved by technology

However, with the method mentioned in this document, before stitching images, not only need to adjust the brightness and contrast of each image to be stitched, but also need steps such as cropping, cutting, pasting, and saving of photos, and then splicing, splicing The previous image processing process is complicated; in addition, it is required that the two adjacent images to be stitched should have a certain degree of overlapping area, and the optimal value of the overlapping degree is 50%. Under such a large overlapping degree requirement, the same section to be inspected Under the condition of area, the number of images to be collected is large, and the workload of image processing before stitching is heavy

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