標準號：BS EN 10247-2007
中文標準名稱：使用標準圖片對鋼的非金屬夾雜物含量的顯微圖檢驗
英文標準名稱：Micrographic examination of the non-metallic inclusion content of steels using standard pictures
標準類型：H11
發布日期：2007/5/31 12:00:00
實施日期：2007/5/31 12:00:00
中國標準分類號：H11
國際標準分類號：77.040.99
引用標準：EN ISO/IEC 17025
適用范圍：This European Standard defines a method of microscopic non-metallic inclusion assessment using picturecharts.The method does not apply to particles of a length less than 3,0 μm or a width smaller than 2,0 μm. Definedby a product standard or agreement between the involved parties for certain special products, inclusions witha width below 2,0 μm can only be evaluated according to their length. Elongated inclusions with a lengthabove 1 410 μm are counted separately and are beyond the upper application limit of this standard. Globularinclusions with a diameter of 3,0 μm and above are included in the assessment.It is assumed, if particles are elongated or if there are stringers of particles, that they are parallel to eachother. Other arrangements are not covered by this standard. This European Standard applies to samples witha microscopic precipitation approaching random distribution.From the data of measurements obtained by this method, evaluation according to other standards can beestablished.This European Standard does not apply to free cutting steels.NOTE The basic principle of this European Standard allows the determination of non-metallic inclusion content byimage analysis techniques.