摘要
铁合金是指炼钢时作为脱氧剂、合金添加剂等加入铁水中使钢具备某种特性或达到某种要求的冶金产品,是铁与一种或几种元素组成的合金,主要用于钢铁冶炼,其成分直接影响冶炼质量。铁合金成分分析主要包括湿法分析和仪器分析。目前主要采用的铁合金分析方法存在不足,包括操作复杂、分析周期长、样品消解必须完全等,而一些铁合金消解不完全,给仪器分析造成困难。采用粉末压片法制样,形成一定厚度的光滑平整的压片试样,可直接在X射线荧光光谱仪上测量,并分别测定硅铁、锰铁、硅锰合金、铬铁、钼铁、钒铁、铌铁粉末混合后的主次元素含量,利用不同制造商提供的标准样品制作工作曲线,通过曲线线性情况,验证矿物效应影响不显著;将初始试样研磨后分别通过最大孔径为150,104,74,53μm的筛网,再与一定比例的微晶纤维素和硬脂酸混匀后,经压样机压片制成粉末压片试样,压片试样在X射线荧光光谱仪上测量,验证主次元素荧光强度,最终确定当组成试样的粉末最大粒径小于74μm时,粉末压片试样的荧光强度趋于稳定,粒度效应对分析结果的影响可以基本消除,能满足不同种类铁合金中对主次元素含量的检测要求。
Ferroalloys refer to metallurgical products added to molten iron as deoxidizers,alloy additives,etc.during steelmaking.Their compositions directly affect the smelting quality and steel characteristics.The composition analysis methods of ferroalloys mainly include wet analysis and instrumental analysis.Currently used ferroalloy analysis methods have the shortcomings including complex operations,long analysis cycles,and the need for complete sample digestion.Some ferroalloys have incomplete digestion,which makes analysis difficult.We use the powder compression method to form smooth and flat compression samples,which can be directly detected by X-ray fluorescence instrument.The primary and secondary element contents of silicon iron,manganese iron,silicon manganese alloy,chromium iron,molybdenum iron,vanadium iron,and niobium iron powder after mixing are measured separately.Working curves are made compareing with the standard samples from different manufacturers,and the mineral effect is verified to be insignificant via caculating the linearity of the curves.Grind the initial sample and through the maximum apertures of 150,104,74,53μm,respectively.After mixing the powder sample with the adhesive,powder tablets are molded and then detected on the X-ray fluorescence instrument.It is determined that when the maximum particle size of the powder is less than 74μm,the fluorescence intensity of the tablet samples tends to stabilize,and the effect of particle size on the analysis results can be basically eliminated.This research can meet the detection requirements for the content of primary and secondary elements in different types of ferroalloys.
作者
卜兆杰
苏加强
黄健强
寇德祥
王晓旋
杨建刚
BU Zhaojie;SU Jiaqiang;HUANG Jianqiang;KOU Dexiang;WANG Xiaoxuan;YANG Jiangang(LS Test Technology Co.,Ltd.,Lanzhou 730300 China;Lanzhou Research Institute of Industry,Lanzhou 730050,China)
出处
《中国材料进展》
CAS
CSCD
北大核心
2023年第8期681-684,共4页
Materials China
关键词
快速分析
粉末压片
铁合金
光谱法
rapid analysis
power pressed method
ferroalloy
spectrometry
