火花源原子发射光谱法分析钢中酸溶铝的准确性探讨  

Research of accuracy for determination of acid-soluble aluminum in steel by spark source atomic emission spectrometry

作　　者：张毅[1] 赵涛[1] 朱莉[1] 缪乐德[1] 

机构地区：[1]宝山钢铁股份有限公司研究院,上海201900

出　　处：《冶金分析》2009年第5期24-30,共7页Metallurgical Analysis

摘　　要：在用火花源原子发射光谱法分析钢中酸溶铝时发现,无论是采用峰值积分法还是脉冲分布分析法,酸溶铝的分析结果与湿法分析结果之间时常出现偏差,且这种偏差表观上没有一定的规律性。本文针对这种偏差现象进行了理论分析和实验验证,证实了这种偏差现象与样品中AlN析出物的粒径大小存在的关系:AlN析出物的粒径越大,酸溶铝分析偏差越大;当AlN析出物的粒径小于300 nm时,酸溶铝分析偏差可以小到可忽略的程度。因此,采用火花源原子发射光谱法分析钢中酸溶铝应该注意样品中的元素组成和成分含量,并通过氮含量和微合金化元素含量判断该法准确分析酸溶铝的可行性。When acid-soluble aluminum （Als） in steel is analyzed by spark source atomic emission spectrometry, the result often deviates from that obtained by wet method, whether peak integration method spectrum （PIMS） or pulse discrimination analysis （PDA） is used. Besides, these deviations usually show no regularity. In this thesis, the relation between the deviations and the particle size of AlN precipitate in steel was demonstrated by experiments and theoretical analysis. It is proved that the bigger the particle size of AlN precipitate in steel is, the larger the deviation of AlN analysis results will be. The deviation of Als analysis results could be overlooked when the particle size of AlN precipitate is smaller than 300 nm. Therefore, when spark source atomic emission spectrometry is used to analyze Als in steel, element composition and content should be paid attention to,and the feasibility of accurate analysis of acid-alaminium with the method should be evaluated through contents of nitrogen and alloying elements.

关 键 词：火花源原子发射光谱法 酸溶铝 峰值积分法 脉冲分布分析法 

分 类 号：TG115.3[金属学及工艺—物理冶金]