首页|Effect of FeSi additive in dual-chamber sample cup on thermal analysis characteristic values and vermiculating rate of compacted graphite iron
Effect of FeSi additive in dual-chamber sample cup on thermal analysis characteristic values and vermiculating rate of compacted graphite iron
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国家科技期刊平台
NETL
NSTL
万方数据
维普
Thermal analysis plays a key role in the online inspection of molten iron quality.Different solidification process of molten iron can be reflected by thermal analysis curves,and silicon is one of important elements affecting the solidification of molten iron.In this study,FeSi75 was added in one chamber of the dual-chamber sample cup,and the influences of FeSi75 additive on the characteristic values of thermal analysis curves and vermiculating rate were investigated.The results show that with the increase of FeSi75,the start temperature of austenite formation TAL firstly decreases and then increases,but the start temperature of eutectic growth TSEF,the lowest eutectic temperature TEU,temperature at maximum eutectic reaction rate TEM,and highest eutectic temperature TER keep always an increase.The temperature at final solidification point TES has little change.The FeSi75 additive has different influences on the vermiculating rate of molten iron with different vermiculation,and the vermiculating rate increases for lower vermiculation molten iron while decreases for higher one.According to the thermal analysis curves obtained by a dual-chamber sample cup with 0.30wt.%FeSi75 additive in one chamber,the vermiculating rate of molten iron can be evaluated by comparing the characteristic values of these curves.The time difference ΔtER corresponding to the highest eutectic temperature TER has a closer relationship with the vermiculating rate,and a parabolic regression curve between the time difference ΔtER and vermiculating rate η has been obtained within the range of 65%to 95%,which is suitable for the qualified melt.
FeSi75 additivecharacteristic valuevermiculating ratethermal analysiscompacted graphite iron
De-quan Shi、Ze-yu Liu、Gui-li Gao、Yi-cheng Feng
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School of Materials and Chemistry,University of Shanghai for Science and Technology,Shanghai 200093,China
School of Materials Science and Chemical Engineering,Harbin University of Science&Technology,Harbin 150040,China
School of Mechanical and Energy Engineering,Shanghai Technical Institute of Electronics and Information,Shanghai 201411,China
国家科技期刊平台
NSTL
万方数据
维普
