Applicability of Several Estimation Methods of Inclusions in Steel

The cooperative research was conducted on conventional and new estimation technique of inclusions to understand their merits and demerits. Three kinds of samples examined here were Al-killed ultra low carbon steel, high carbon bearing steel and stainless steel. They were analyzed by conventional extraction and two new methods: electron beam melting and photo scattering method.The results were evaluated from the viewpoint of quantity and size distribution of inclusions to determine both the applicability and shortcomings of each technique.