基于灰色关联理论的球墨铸铁原铁液冶金状态评价模型

发布时间：2018-06-12 15:34

本文选题：球墨铸铁 + 原铁液冶金状态　；参考：《机械工程学报》2017年22期

【摘要】：准确、全面评价原铁液的综合冶金质量状态是有效实施球墨铸铁球化孕育处理的基础和保障。基于灰色系统中的关联度理论,研究球墨铸铁原铁液冶金质量状态综合表征参数体系和评价模型的建立方法,并分析所建评价模型的有益效果及应用条件。其步骤主要包括:建立原铁液冶金质量状态综合评价参数体系;构建原铁液冶金质量状态评价灰色关联模型。根据模型计算的关联度综合评价值确定原铁液冶金质量状态等级,并参考各评价参数具体关联系数值,制定冶金状态调整方案。实验室模拟应用结果显示,利用评价参数体系灰色关联度值可以综合评判原铁液的相对冶金质量状态。单个评价参数点的灰色关联系数可表征该参数与该生产条件下最优值的接近程度,并不完全决定最终球化效果。在稳定的生产条件下,评价模型预报球墨铸铁原铁液四个质量等级的准确率可达90%以上。
[Abstract]:It is the foundation and guarantee to evaluate the comprehensive metallurgical quality of the original iron liquid accurately and comprehensively to effectively carry out the inoculation treatment of nodular cast iron. Based on the theory of correlation degree in grey system, the parameter system and evaluation model for the comprehensive characterization of metallurgical quality of nodular cast iron in molten iron were studied, and the beneficial effects and application conditions of the evaluation model were analyzed. The main steps are as follows: to establish a comprehensive evaluation parameter system for the metallurgical quality of molten iron and to build a grey relational model for the evaluation of the metallurgical quality of molten iron. According to the comprehensive evaluation value of the correlation degree calculated by the model, the grade of metallurgical quality of original molten iron was determined, and the adjustment scheme of metallurgical state was formulated with reference to the specific relational values of each evaluation parameter. The results of laboratory simulation show that the relative metallurgical quality of molten iron can be evaluated synthetically by using the grey correlation degree of evaluation parameter system. The grey correlation coefficient of a single evaluation parameter point can indicate the degree of proximity between the parameter and the optimal value under the production conditions, and does not completely determine the final spheroidization effect. Under stable production conditions, the accuracy of the evaluation model for predicting the four quality grades of nodular cast iron molten iron can reach more than 90%.
【作者单位】：哈尔滨理工大学材料科学与工程学院;
【基金】：国家自然科学基金资助项目(51474082)
【分类号】：TG255

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