ISO4967-2013在实际应用中的常见问题和修订建议

Common problems and improvement suggestions of ISO4967-2013 in practical application

对ISO-4967-2013《钢中非金属夹杂物含量的测定》进行深入剖析,从标准图谱、夹杂物类型和系列的划分、级别评定和检验方法等方面存在的问题,与ASTM E45-2018a对比,提出完善明确同一视场中粗系和细系夹杂物并存情况的评定方法、消除DS类夹杂物和超尺寸D类夹杂物评定的分歧以及标准评级图片错误修正和完善等具体建议,以规范评定方法,消除歧义,推进标准修订工作,提高夹杂物评级的科学性与准确度。

ISO4967-2013 Steel-Determination of Content of Nonmetallic Inclusions was deeply analyzed.The existing problems in standard spectrum diagram,classification of type and series of inclusions,rating and inspection method were compared with ASTM E45-2018 a.Some specific suggestions were proposed,e.g.,the evaluation method of coexisting coarse and fine inclusions in the same field of view should be improved and clear,the divergence in evaluation of DS inclusions and oversized D inclusions,as well as the revision and modification of incorrect images for standard rating.The study was to standardize the evaluation method and eliminate the ambiguity,thus advancing the revision of standards,and improving the scientificity and accuracy of inclusion rating.