球墨铸铁缩松分析计算模型的建立  

An Evaluation Model of Porosity of Spheroidal Graphite Iron

作　　者：郑洪亮 郝良品[1] 万国庆[2] 田卫星[1] 田学雷[1] 

机构地区：[1]山东大学材料液态结构及其遗传性教育部重点实验室,山东济南250061 [2]济南二机床集团有限公司铸造分公司,山东济南250022

出　　处：《铸造》2007年第2期158-161,共4页Foundry

摘　　要：用系列试验铸件研究了主要工艺因素(碳当量、孕育量以及铸件模数)对球墨铸铁件缩松产生的影响规律。结果表明,在试验选择的范围内,随着碳当量增大、孕育量增加,缩松面积率减小;对亚共晶和共晶成分的球铁,模数的减小会导致缩松面积率的增大;对过共晶球铁,缩松面积率随模数增大而减小。通过对试验数据的回归分析,建立了球墨铸铁缩松面积率计算模型。为球墨铸铁缩松的预测模拟计算提供了依据。It was studied that the effect of carbon equivalent, inoculation and casting modulus on porosity of spheroidal graphite iron using a series of castings. It reveals that bigger carbon equivalent and more inoculation will reduce the porosity. And to the hypoeutectic and eutectic spheroidal graphite iron, the smaller of the casting modulus will cause the bigger of the area ratio of the porosity but to the hypereutectic spheroidal graphite iron the result becomes opposite. A regression model has been developed with the parameters of carbon equivalent, inoculation and cooling rate at the eutectic temperature. The model provides a new method to quantify the porosity of the spheroidal graphite iron.

关 键 词：球墨铸铁 缩松 计算模型 

分 类 号：TG255[金属学及工艺—铸造]