ICS 77.080.01 CCS H 11 团 体 标 准 T/CSTM 00012E —2021 Iron and steel --Characterization of distribution of multi- element contents and status--Original position statistic distribution analysis method of laser induced breakdown spectroscopy 钢铁多元素成分及状态分布表征 激光诱导击穿光谱原位统计分布分析方法 (English Translation) Issued by Chinese Society for Testing & Materials ，ZhongguancunIssue d date: 2021 -11-10 Implementation date : 2022 -02-10 CSTMhQÆSÑ^Ou( 全国团体标准信息平台 T/CSTM 00012E —2021 Foreword This English document was translated from T/CSTM 00012 -2017 by CSTM/FC99 (The integrated field technical committee of Chinese Society for Testing & Materials ). In case of any doubt about the contents of English translatio n, the Chinese original shall be considered authoritative. This document is drafted refer to the rules given in the GB/T 1.1 -2020 (Directives for standardization -Part 1: Rules for the structure and drafting of standardizing documents ). Attention is drawn to the possibility that some of the elements of this standard may be the subject of patent rights. The issuing body of this document shall not be held responsible for identifying any or all such patent rights. This document was proposed by CSTM/ FC99 ( The integrated field technical committee of Chinese Society for Testing & Materials ). This document was prepared by CSTM/ FC99 (The integrated field technical committee of Chinese Society for Testing & Materials ). CSTMhQÆSÑ^Ou( 全国团体标准信息平台 T/CSTM 00012E —2021 Iron and steel --Characterization of distribution of multi -element contents and status --Original position statistic distribution analysis method of laser induced breakdown spectroscopy Warning—People using this document should have practical work experienc e in formal laboratory. In this document, not all possible safety issues are pointed out. The user is responsible for taking appropriate safety and health measures, and ensuring compliance with the conditions stipulated by relevant national laws and regula tions. 1 Scope This document specifies a method to characterize the multi -element contents and status in iron and steel by original position statistic distribution analysis method of laser -induced breakdown spectroscopy . This document is applicable to characterize the content distribution, location distribution and state distribution of multi -element in iron and steel. The content frequency statistical distribution, segregation statistical distribution, apparent density statistical dis tribution, statistic fitting degree statistical distribution and the type, content and particle size statistical distribution of inclusions can be characterized. 2 Normative references The following document is referred to in the text in such a way that so me or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB/T 21834 -2008 Medium and low alloy steel -Determination of the distribution of multi -element contents -Original position statistic distribution analysis me thod 3 Theory The original position statistic distribution analysis is performed by laser -induced breakdown spectroscopy (LIBS) on the relative motion sample. The excited emission spectra are dispersed into characteristic spectral line . The emission line intensities of the selected reference line and the analysis line are measured. Th e calibration curve is setup by the standard samples. According to the intensities and the calibration curve, the elements content of the scanning area is obtained. The excitation location information is synchronously obtained. By statistical distribution analysis, various information used to evaluate the distribution of elements within the scanning area is obtained, such as content CSTMhQÆSÑ^O