Analysis of Non-metallic Inclusions in Steel

The existence of non-metallic inclusions in steel is inevitable. How to correctly judge and identify the properties of non-metallic inclusions is very important. The types of non-metallic inclusions in steel were identified by optical microscope, scanning electron microscope and energy dispersive spectrometer according to the optical and morphological characteristics of non-metallic inclusions. The grade of inclusions shall be evaluated according to relevant standards, and the composition and source of inclusions were accurately confirm in combination with the qualitative and quantitative analysis results of inclusions composition energy spectrum. It provided a scientific basis for improving the production process of steelmaking and continuous casting, reducing the number of harmful inclusions, improving the purity of steel and producing high-quality steel.