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双室样杯中FeSi添加剂对蠕铁热分析特征值及蠕化率的影响
Influence of FeSi in Double-chamber Sample Cup on Thermal Analysis Characteristic Values and Vermiculating Rate
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- DOI:
- 作者:
- 姜爱龙 刘泽宇 刘庆义 李娜娜 徐振宇 石德全
JIANG Ailong;LIU Zeyu;LIU Qingyi;LI Nana;XU Zhenyu;SHI Dequan
- 作者单位:
- 潍柴动力股份有限公司 哈尔滨理工大学材化学院
Weichai Power Co.,Ltd.,Weifang 261061,China;School of Materials Science&Chemical Engineering,Harbin University of Science&Technology,Harbin 150040,China
- 关键词:
- 蠕墨铸铁 FeSi添加剂 热分析特征值 蠕化率 双室样杯
vermiculating graphite cast iron FeSi additive characteristic values for thermal analysis vermiculating rate double-chamber sample cup
- 摘要:
- 热分析技术在蠕墨铸铁生产的铁液质量检测中起到关键作用。铁液凝固过程的变化可通过热分析特征值中体现出来。硅是影响蠕墨铸铁凝固的重要元素,将FeSi添加到双室热分析样杯的单室中,研究不同FeSi含量对蠕铁铁液热分析特征值和蠕化率的影响。结果表明,随着样杯中FeSi添加剂的增加,奥氏体初始形成温度TAL呈现先减小后增加的趋势,TSEF、TEU、TEM和TER均呈上升趋势,TES则随FeSi加入量的增加而变化不大。FeSi添加剂对不同预蠕化水平铁液的蠕化率有不同的影响,低蠕化水平铁液的蠕化率随FeSi加入量增加而增加,而高蠕化水平铁液的蠕化率则是随FeSi加入量增加而降低。随蠕铁蠕化率的增加,对应于双室铁液共晶最高温度TER的时间差先增加后减少,二者近似于抛物线的关系。
Silicon is an important element affecting the solidification of vermicular graphite cast iron.FeSi was added into a single chamber of a two-chamber sample cup to study the influence of different FeSi content on the characteristic value and vermicular rate of molten iron during thermal analysis.The results show that with the increase of FeSi additive,the initial austenite formation temperature TAL firstly decreases and then increases,while and TSEF,TEU,TEM and TER all increase,while TES has little change with the increase of FeSi additive.The effect of FeSi additive on the vermicular rate of molten iron at different pre-vermicular levels is different.The vermicular rate of molten iron at low vermicular level increases with the addition of FeSi,while the vermicular rate of molten iron at high vermicular level decreases with the addition of FeSi.With the increase of vermicular rate,corresponding to the time difference of the maximum temperature TER of two-compartment molten iron eutectic increases first and then decreases,the relationship between the two is similar to a parabola.