Method for quantitative evaluation of metal powder

The method addresses the limitations of existing image-based evaluation by using AI segmentation to create a 3D polygon image from 2D slices, ensuring robust and precise assessment of metal powder properties and gas pores.

JP2025121673APending Publication Date: 2025-08-20DAIDO STEEL CO LTD
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Patent Information

Application Number
JP2024017268
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Filing Date
2024-02-07
Publication Date
2025-08-20

AI Technical Summary

Technical Problem

Existing methods for quantitatively evaluating metal powders used in additive manufacturing rely on image processing parameters, which lack robustness and fail to account for three-dimensional continuity, making accurate evaluation of powder particles and gas pores challenging.

Method used

A method involving slicing a metal powder layer to obtain two-dimensional images, segmenting powder regions using an AI model, connecting these regions in a stacking direction to form a voxel 3D image, and converting it into a polygon 3D image for quantitative evaluation, independent of image processing parameters.

Benefits of technology

Enables stable and accurate quantitative evaluation of metal powder particles and gas pores without relying on image processing parameters, providing comprehensive three-dimensional analysis.

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Abstract

To provide a method for quantitative evaluation of metal powder with which quantitative evaluation of powder particles can be conducted stably and accurately without depending on an image processing parameter.SOLUTION: A method for quantitative evaluation of metal powder includes: slicing a metal powder layer to acquire a plurality of two-dimensional images 11; dividing a powder cross-section Pc in each of the two-dimensional images 11 into segments of powder regions 21 by using an AI model for segmentation, and subsequently connecting the segments of powder regions 21 to each other in a lamination direction orthogonal to a slice direction to obtain a segmented voxel three-dimensional image; converting the voxel three-dimensional image into a polygon three-dimensional image along the contour of the voxel three-dimensional image; and calculating a quantitative evaluation value of the metal powder from the polygon three-dimensional image.SELECTED DRAWING: Figure 1
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Citation Information

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