球墨铸铁熔体中活性Mg含量的测定方法  

Determination Method of the Active Mg Content in the Melt of Ductile Iron

作　　者：徐振宇[1] 李大勇[1] 马旭梁[1] 王利华[1] XU Zhen-yu;LI Da-yong;MA Xu-liang;WANG Li-hua(School of Material Science and Engineering,Harbin University of Science and Technology,Harbin 150040,China)

机构地区：[1]哈尔滨理工大学材料科学与工程学院,黑龙江哈尔滨150040

出　　处：《哈尔滨理工大学学报》2018年第4期99-102,共4页Journal of Harbin University of Science and Technology

基　　金：国家自然科学基金(51474082)

摘　　要：为了实现球墨铸铁球化效果炉前快速评价与动态调控,在热分析样杯内添加适量化学试剂FeS、Fe_2O_3与Te的混合物获取铁水试样的变性冷却曲线,通过Mg含量炉前光谱分析结果与其冷却曲线上的相关凝固特征参数回归分析获得预测方程,实现了球化铁水中活性Mg含量的炉前快速测定。实验结果表明,Mg质量分数在0.025%~0.06%范围内,Mg含量预测值与相应热分析凝固特征参数显著相关。在120个统计样本内,Mg质量分数回归公式的预报误差80%以上在±0.004%范围内,满足在线控制要求。In order to realize the fast evaluation and the dynamic adjustment and control of nodularization effectiveness for ductile iron preparation in the front of furnace,a mixture of the chemical reagent FeS,Fe2O3 and Te of moderate amounts in use was added in the thermal analysis sample cup for a modified cooling curve of the testing melt.Then,the quick testing method of active Mg content in nodularized melt was studied,of which the prediction equation for Mg content calculation was obtained by regression analysis between the spectrum analysis results of Mg and the related solidification characteristic parameters on the cooling curve in this paper.The experimental results show that the testing method is reasonable.Within the scope of the Mg content of 0.025%~0.06%,the predicted value Mg%of magnesium content is correlated with corresponding thermal analysis solidification characteristic parameters significantly,so the calculated results are reliable.For the 120 statistical sample data,more than 80%of the prediction error is within±0.004%for the regression formula of the Mg content,meeting the control requirements on line.

关 键 词：球墨铸铁 活性Mg含量 热分析 测试样杯 回归分析 

分 类 号：TG143.5[一般工业技术—材料科学与工程]