火花源原子发射光谱法测定钢中超低氮  

Determination of ultra-low nitrogen in steel by spark source atomic emission spectrometry

作　　者：黄子鉴[1] 康宝军[1] 赵竞泽[1] 宋立伟[1] 张翔辉[1] 

机构地区：[1]鞍山钢铁股份有限公司质量检验中心,辽宁鞍山114021

出　　处：《冶金分析》2008年第10期23-26,共4页Metallurgical Analysis

摘　　要：研究了火花源原子发射光谱法测定低合金钢中超低氮的方法。对取样、制样深度对稳定性的影响、对分析条件的选择进行了探讨。结果表明，取样时控制脱氧剂加入量不超过0．35％且选用多刀头铣刀盘，铣样深度为1．4mm；在氩气的质量分数不小于99．9995％，冲洗时间为8S，预燃时间为3．3s，采用高能预燃高能测量光源方式等优化的分析条件下，可有效测定低合金成品钢中质量分数为0．0010％-0.0080％的超低氮。该方法对随机选取的样品进行测定，结果与氧氮仪的分析结果吻合，偏差符合相关规定的要求。The method of determining the ultra-low nitrogen in low alloy steel by spark source atomic emission spectrometry has been researched. The influences of sampling method and sampling depth on stability and the selection of analysis conditions have been discussed. The results indicated that ultralow nitrogen （0.0010%-0.008%, ω/%） in low alloy steel could be determined accurately under such optimized analytical conditions as follow：the addition of deoxidizing agent was less than 0.35%, multi-head milling cutter should be chosen and the milling depth was 1.4 mm while sampling, the mass percentage of argon was no less than 99.999 5%（w/%）, the washing time was set as 8s, the precombustion time was set as 3. 3 s and energetic precombustion energetic measure optical source mode is adopted. The proposed method was applied to determine the samples selected randomly, the results were consistent with those obtained by oxygen and nitrogen analyzer, and the deviation satisfied the relevant specifications.

关 键 词：火花源原子发射光谱 超低氮 低合金钢 

分 类 号：TG115.3[金属学及工艺—物理冶金]