蠕墨铸铁铁液状态的定量化测评  

Quantitative Measurement of Compacted Graphite Cast Iron Melt Quality

作　　者：孙兴见[1] 李言祥[1] 陈祥[1] 

机构地区：[1]先进成形制造教育部重点实验室清华大学机械工程系,北京100084

出　　处：《铸造》2007年第1期59-61,64,共4页Foundry

摘　　要：高质量蠕墨铸铁的最佳生产方式是在炉前预处理(蠕化和孕育)后,对铁液状态进行快速准确测评,并根据测评结果进行快速调整,实现铁液状态的闭环控制。在本研究中,用热分析曲线整体形状表征蠕墨铸铁铁液状态,当热分析曲线之间的差别很小时,相同凝固条件下试样组织的蠕化率差别可忽略。热分析曲线整体形状法与定量金相、模式识别和数据库技术相结合,能够实现蠕墨铸铁铁液状态的定量化预测,为铁液状态的闭环控制奠定基础。The closed-loop control of melt quality is the best method for the production of high quality CGI. In this process, after pre-treating, the melt quality of compacted graphite iron is assessed rapidly and precisely, some corrective adjustment treatments can be carded out when needed to meet production requirements. In this paper, the freezing segment of a cooling curve is picked out as the token of melt quality. When two curves are closely similar, the microstructure differences of corresponding samples under the same cooling condition can be neglected. Therefore, freezing parts of cooling curves integrated with quantitative metallography, pattern recognition and database technology can be used to quantitatively predict CGI melt quality, paving the way for closed-loop control of CGI melt quality.

关 键 词：蠕墨铸铁 铁液状态 蠕化率 

分 类 号：TG255[金属学及工艺—铸造]