Method for detecting sphericity degree of powder

By calculating powder sphericity using composite shape descriptors, the problem that existing testing standards cannot accurately reflect the true sphericity of powder is solved, improving the scientific nature and accuracy of testing, and enhancing the quality and performance of additively manufactured parts.

CN121324210AActive Publication Date: 2026-01-13INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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Patent Information

Application Number
CN202511902705.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-12-17
Publication Date
2026-01-13
Estimated Expiration
2045-12-17

AI Technical Summary

Technical Problem

Existing powder sphericity testing standards cannot accurately reflect the true sphericity of powders, leading to a decline in the quality and performance of formed parts during additive manufacturing, especially a significant reduction in fatigue performance.

Method used

A composite shape descriptor (mesoscopic shape descriptor × geometric shape factor) is used to calculate powder sphericity. By randomly sampling powder particles, the contour descriptor is obtained, the geometric shape factor and mesoscopic descriptor are calculated, the number of powder particles of different morphology types is classified and counted, the average sphericity value of each morphology type is calculated, and finally the weighted average sphericity value is obtained.

Benefits of technology

This improves the scientific rigor and accuracy of powder sphericity testing, ensuring that the test results are closer to the actual state of the powder, reducing defects in molded parts, and enhancing the mechanical properties of the molded parts.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention relates to a powder sphericity detection method, relates to the technical field of powder property detection, and solves the problem of poor accuracy of an existing powder sphericity detection method. The detection method comprises the following steps: randomly extracting powder to be detected, and obtaining a contour descriptor of each powder particle; calculating a geometrical shape factor and a mesoscopic descriptor of each powder particle according to the contour descriptor of each powder particle; classifying the powder to be detected according to the section morphology of the powder particles, and counting the number of the powder particles in the powder with different section morphology types; according to the number of the powder particles in the powder of each section morphology type and the geometrical shape factor and the mesoscopic descriptor of each powder particle, calculating the average sphericity value of the powder of each section morphology type; and calculating the final sphericity degree of the powder to be measured based on the average sphericity degree value of the section morphology type powder. According to the invention, scientificity and accuracy of a powder sphericity detection result can be ensured.
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Citation Information

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