硅锰合金电阻法定硅  

Determination of silicon content in Si-Mn ferroalloys by measuring resistivity

作　　者：曾世林[1,2] 储少军[1] 李婧[1] 陈佩仙[1] 陈忠健[2] 

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083 [2]中钢集团广西铁合金有限公司,广西546102

出　　处：《北京科技大学学报》2010年第8期993-997,共5页Journal of University of Science and Technology Beijing

摘　　要：根据准二元合金随其中某种合金元素含量的不同,其合金电阻率发生单值变化的规律,提出了一项硅锰合金电阻法定硅的检测技术.实验结果表明,硅锰合金中硅含量与电阻率变化的关系可表示为[Si%]=-12.51+2×107ρ-4×1012ρ2,当合金中硅的质量分数小于6%时,合金中锰铁比对其电阻率变化的影响不大,定硅误差为0.005%～0.178%.用于电阻率测量的合金样品适合的尺寸为6.00～6.50mm、长1cm左右,可以避免试样中夹渣、裂隙等缺陷对电阻测量精度的影响.ABSTRACT Determining the content of silicon in Si-Mn ferroalloys was investigated by a novel resistivity measurement technique, which is based on the single-valued change of electrical resistivity with the content of one alloy element in a quasi-binary alloy. The relationship between silicon content and electrical resistivity in Si-Mn alloys was obtained by a series of experiments. It can be expressed as [Si%]=-12.51＋2×10^7ρ-4×10^12ρ^2, When the content of silicon in Si-Mn alloys is less 6%, the ratio of Mn to Fe has little influence on the electrical resistivity. Furthermore, the error in determining the silicon content can be controlled within 0. 005% to 0. 178%. To avoid the effect of some factors including slag inclusions, voids and other defects on the measuring accuracy, samples applied to measure the electrical resistivity are 6.00 to 6.50 mm in diameter and about 1 cm in length.

关 键 词：铁合金 电阻率 硅含量 检测技术 

分 类 号：TF125.1[冶金工程—粉末冶金]