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<p>Electromagnetic nondestructive testing offers significant advantages for detecting grinding burns in ferromagnetic components, but the transmission mechanism linking grinding burns to magnetic response signals remains unclear, limiting quantitative detection precision. This study investigates G95Cr18 bearing steel using electron backscatter diffraction, magnetic force microscopy, and vibrating sample magnetometry to characterize microstructure and magnetization characteristics across grinding burn severities. Results show that with increasing burn severity, surface deformation regions expand, grain size decreases, grain boundaries multiply, dislocation distribution homogenizes, and magnetic domain structures become more disordered. Concurrently, saturation magnetization declines, coercivity rises, and magnetization difficulty increases significantly. This work elucidates the mechanism through which grinding burns alter ferromagnetic material macro-micro properties, establishing a theoretical foundation for quantitative magnetic evaluation of grinding burns.</p>

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The effect of grinding burns on microstructure and magnetization characteristics of G95Cr18 bearing steel

  • 期刊论文

  • 发表日期：

    2026年1月15日

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  • Ruotian Wang,
  • Xiangyi Hu,
  • Xiaoqiang Wang,
  • Haoying Wei,
  • Xuyang Bai

摘要

Electromagnetic nondestructive testing offers significant advantages for detecting grinding burns in ferromagnetic components, but the transmission mechanism linking grinding burns to magnetic response signals remains unclear, limiting quantitative detection precision. This study investigates G95Cr18 bearing steel using electron backscatter diffraction, magnetic force microscopy, and vibrating sample magnetometry to characterize microstructure and magnetization characteristics across grinding burn severities. Results show that with increasing burn severity, surface deformation regions expand, grain size decreases, grain boundaries multiply, dislocation distribution homogenizes, and magnetic domain structures become more disordered. Concurrently, saturation magnetization declines, coercivity rises, and magnetization difficulty increases significantly. This work elucidates the mechanism through which grinding burns alter ferromagnetic material macro-micro properties, establishing a theoretical foundation for quantitative magnetic evaluation of grinding burns.