公开(公告)号：US20250146998A1

公开(公告)日：2025-05-08

申请号：US18791281

申请日：2024-07-31

Applicant: Guilin University of Technology

Inventor： Jialong Shen ,  Jianing Zhao ,  Chen Zhang ,  Xi Liu ,  Yufeng Chen ,  Zhengbing Meng ,  Yibing Li

IPC: G01N33/204 ,  G01N27/02

Abstract: Disclosed is a measurement method for characterizing ferrite grain size and phase fraction of duplex stainless steel, including the steps of: conducting heat treatment on industrial pure iron and duplex stainless steel respectively; conducting wire cutting on the samples to obtain the samples to be tested; measuring ferrite grain diameters and phase fractions of the samples to be tested; testing the samples to be tested based on an improved U-shaped sensor probe to obtain test data; constructing a response relational database; obtaining the information of the sample of arbitrary ferrite grain size and phase fraction. The present invention adopts an innovative electromagnetic characterization method to measure single microcomponents in the steel and iron materials, which can be applied to the measurement of smaller samples and improve the measurement efficiency.