样杯添加剂对蠕墨铸铁热分析曲线及试样组织的影响  

Effect of Additives in Sample Cup on Thermal Analysis Curve and Microstructure of Vermicular Graphite Iron

作　　者：姜爱龙 刘泽宇 李娜娜 刘庆义 宋洪达 徐振宇[2] 石德全[2] JIANG Ai-long;LIU Ze-yu;LI Na-na;LIU Qing-yi;SONG Hong-da;XU Zhen-yu;SHI De-quan(Weichai Power Co.,Ltd.,Weifang 261061,Shandong,China;School of Materials Science&Chemical Engineering,Harbin University of Science&Technology,Harbin 150040,Heilongjiang,China)

机构地区：[1]潍柴动力股份有限公司,山东潍坊261061 [2]哈尔滨理工大学材化学院,黑龙江哈尔滨150040

出　　处：《铸造》2022年第5期569-573,共5页Foundry

摘　　要：采用单室加入添加剂的砂型双室热分析样杯,研究了75FeSi和FeS_(2)添加剂对蠕铁铁液冷却曲线和石墨形态的影响,为蠕墨铸铁热分析样杯添加剂的优选奠定理论依据。结果表明,加入75FeSi后,样杯试样中球状石墨数量逐渐增加,蠕化率逐渐减小。随75FeSi含量的增加,石墨尺寸先减小后增大,共晶再辉温度呈现逐渐减小趋势,冷却曲线从亚共晶逐渐向共晶转变。样杯中添加0.05%FeS_(2)时,冷却曲线转变为灰铸铁凝固形式,继续增加FeS_(2)含量对冷却曲线形态影响不大,石墨由蠕虫状转变为片状。FeS_(2)含量由0.05%增加到0.10%时,石墨由D型和E型转变为以A型为主+B型为辅;当FeS_(2)含量达到0.20%时,石墨形态呈现短厚状。0.45%的75FeSi或0.05%的FeS_(2)对于Φ30 mm×40 mm的双室样杯是较为合适的加入量。The effects of 75FeSi and FeS_(2) additives on the cooling curves and graphite shape of vermicular graphite iron were studied by using the double-chamber thermal analysis sample cups with additive in one chamber.This provided a theoretical basis for optimizing additives of the cups.The results showed that the numbers of spherical graphite increased and the vermiculating rate decreased after adding 75FeSi.With the increase of the 75FeSi content,the graphite size decreased at first and then increased,and the eutectic recalescence temperature decreased gradually,and the cooling curve gradually changed from hypoeutectic to eutectic.When 0.05%FeS_(2) was added to the cup,the cooling curve changed into the solidification mode of gray cast iron.The continuous increase of the FeS_(2) had little effect on the shape of the cooling curve,and the graphite changed from vermicular to flake.When the content of FeS_(2) increased from 0.05%to 0.10%,the graphite changed from D-type and E-type to A-type.When the content of the FeS_(2) reached 0.20%,the graphite became short and thick.The 0.45%75FeSi or 0.05%FeS_(2) is an appropriate addition content forΦ30 mm×40 mm double-chamber sample cup.

关 键 词：蠕墨铸铁 FESI FeS_(2) 双室热分析样杯 冷却曲线 

分 类 号：TG143.49[一般工业技术—材料科学与工程]