Abstract：The representative and accuracy of inclusion analysis are two significant issues in characterizing non-metallic inclusions in low alloy steel. In this paper, a synthetical characterization method is proposed: Firstly, the target inclusions to be characterized are defined according to different products and technology; then, the target inclusions are analyzed synthetical through one or more appropriate characterization methods; lastly, the amount and size distribution of inclusions per unit area or volume could be calculated out with the number and size of inclusion particles within a particular field. Practical application example indicates that, through the synthetical characterization of target inclusions from the aspects of morphology, chemical composition, precipitation manner, quantity and size distribution, etc, the relationship between the characterization results and the improvement of products property & technology could be discovered and the characterization properties of the target inclusions could be determined, which provides effective support for the research and development of products and technology.
