抄録
Metal heat treating is the fundamental technology to support most of the industrial field as automobile and aircraft. Since the quality of the heat treatment cannot be determined from the appearance, microscopic examination by means of the metallographic test specimen prepared from the products and components that require strength is performed. To acquire the real structure of the part, the cross section of the metallographic specimen shall be mirror surface finish without harmful scratches or edge rounding. These metallographic specimens are prepared by a few number of skillful inspector. Since the number of skillful inspector for grinding technique of metallographic sample is less, successor education is rely on not the systematic education but the on job training basis. The purpose of this study is to clarify the expert's characteristics of polishing process based on the eye movement analysis and ground surface finish. As a result, the expert made pressure adjustments and cleaning the rotating clothe surface and supplying alumina as needed while performing the grinding and polishing. The variation of the width for scratches by the expert was less than that by the non-expert.
