Progress in detection technologies of non-metallic inclusions in steel
YAO Conglin1, YANG Hao2, ZHANG Mi'na3, CHEN Changyong*2,4
1. Engineering Technology Research Center,Zhongye Changtian International Engineering Co., Ltd., Changsha 410205,China; 2. School of Metallurgy,Northeastern University,Shenyang 110819,China; 3. Ningbo Institute of Materials Technology & Engineering,Chinese Academy of Sciences, Ningbo 315201,China; 4. Department of Industrial and Systems Engineering, The Hong Kong Polytechnic University,Hong Kong 999077,China
Abstract：The non-metallic inclusion in steel is one of defects that have the greatest hazard to steel structures and properties.The detection of inclusions in steel is critical to the production of high-quality steels.In this paper,the new detection methods for inclusions developed in recent years were briefly summarized.Then several advanced technologies were screened for the deep discussion,including ASPEX scanning electron microscope automatic analysis,micro-computed tomography(Micro-CT),continuous slice scanning electron micropy analysis(SBFSEM), transmission electron microscope(TEM) analysis,focused ion beam three-dimensional atom probe-atom probe tomography(FIB-3DAP-APT),laser-induced breakdown spectroscopy(LIBS),original position statistical distribution-spark mapping analysis for large samples(OPA-SMALS),and suspension steelmaking inclusion observation.The latest application progress of these technologies was analyzed,and the advantages and disadvantages were summarized via mutual comparison.Moreover,the influence of electron beam energy selection on the detection results during the inclusion composition analysis by scanning electron microscope was also introduced.Finally,the direction for further improvement and development of various detection technologies in future was pointed out.
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