摘要
TCH600氧氮分析仪和样品的制备过程都影响着钢中氧氮含量的测定结果。一般载气不纯、试剂失效都会使氧氮含量分析结果偏高;坩埚与电极接触不好或者使用性能差的稳压电源以及空白值不稳定都会使氧氮分析结果不稳定;钢样品制备时取提桶样测氧含量好于饼状样,测氮含量两者分析结果相差不大;横向切割的氧氮棒氧化物和氮化物分布不均匀,测得的氧含量偏高;油污使氧含量分析结果明显升高,对氮含量分析结果无影响,对送到分析实验室的光洁氧氮棒如果进行氧分析一定要进行锉刀打磨和清洗;在避免样品油污汗渍的情况下,无水乙醇与丙酮的清洗效果相差不大,可以用无水乙醇做清洗剂。
The determination results of oxygen and nitrogen contents in steel samples are influenced by TCH600 instrument and sample preparation.Generally carrier gas impurity and disabled reagent increase the determination results.Bad contact between crucible and electrode slice or poor performance of power supply and unstable blank could all cause results instability.In process of preparation steel sample,the block-shaped sample is better than disk-shaped sample for detecting oxygen and they are the same for detecting nitrogen.Eccentric cutting is better than radial cutting and centric cutting.Oil dirt affects oxygen detecting result and has nothing to do with nitrogen detecting results.If only oxygen needs to be determined,the steel samples must be filed and cleaned.When avoiding sample polluted by oil ethyl alcohol,the cleaning effect is equal to acetone.
出处
《实验技术与管理》
CAS
北大核心
2016年第7期33-39,共7页
Experimental Technology and Management
关键词
钢样品
氧氮含量测定
影响因素
TCH600
steel sample
determination of oxygen and nitrogen contents
influencing factors
TCH600
