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材料工程  2017, Vol. 45 Issue (7): 27-33    DOI: 10.11868/j.issn.1001-4381.2016.001558
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正三棱锥形夹杂物诱导晶内铁素体形核模型研究
张彩军, 高立娜, 胡闻佳, 朱立光
华北理工大学 冶金与能源学院, 河北 唐山 063009
Intra-granular Ferrite Nucleation Model Induced by Normal Triple Prism Inclusions
ZHANG Cai-jun, GAO Li-na, HU Wen-jia, ZHU Li-guang
College of Metallurgy and Energy, North China University of Science and Technology, Tangshan 063009, Hebei, China
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摘要 通过建立晶内铁素体形核模型,结合数学推导发现,基底相为不规则形状的夹杂物比基底相为球形夹杂物形核功小,易诱导铁素体形核。根据数学模型分析球形夹杂物诱导晶内铁素体形核的影响因素。结果表明:夹杂物尺寸过小时不利于诱导晶内铁素体形核,其尺寸增加到0.15μm后,对铁素体的形核影响反而不大;夹杂物与钢液的润湿角越小,越易诱导铁素体形核;夹杂物与钢液的润湿角为70°~90°时,球形夹杂物易诱导正三棱锥形铁素体析出,而润湿角小于70°时,易诱导球形铁素体析出;析出相为正三棱锥形铁素体形核模型的形核率比析出相为球形铁素体模型的形核率高。通过实验验证了不规则夹杂物可以诱导铁素体形核,且夹杂物尺寸大于0.15μm后,对铁素体的形核影响不大。
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张彩军
高立娜
胡闻佳
朱立光
关键词 晶内铁素体球形夹杂物形核模型正三棱锥形    
Abstract:By establishing the intra-granular ferrite nucleation model and conducting a series mathematical calculation, it was found that the nucleation energy of inclusion in irregular shape is lower than that in spherical shape, which is easier to induce the ferrite nucleation. Moreover, the influence factors of intra-granular ferrite nucleation induced by spherical inclusions were also analyzed. The results show that it is adverse to the nucleation of ferrite when the inclusion size is too small, while it has little effect when the size is larger than 0.15μm. Besides, the smaller of the wetting angle, the easier of the nucleation. When the wetting angle is between 70° and 90°, the ferrite is easily induced by spherical inclusions in the form of normal triangular pyramid. However, when the wetting angle is less than 70°, the ferrite is precipitated in the form of spherical. The precipitation rate of ferrite in the form of triangular pyramid is higher than that of spherical. A group of experiments were also verified that irregular inclusions could induce the nucleation of ferrite, while it had little effect when the size is larger than 0.15μm.
Key wordsintra-granular ferrite    spherical inclusion    nucleation model    normal triangular pyramid
收稿日期: 2016-12-28      出版日期: 2017-07-21
中图分类号:  TG142  
通讯作者: 朱立光(1965-),男,教授,博士,研究方向:凝固理论与铸坯质量控制,联系地址:河北省唐山市曹妃甸区唐山湾生态城渤海大道21号华北理工大学(063210),E-mail:zhulg@ncst.edu.cn     E-mail: zhulg@ncst.edu.cn
引用本文:   
张彩军, 高立娜, 胡闻佳, 朱立光. 正三棱锥形夹杂物诱导晶内铁素体形核模型研究[J]. 材料工程, 2017, 45(7): 27-33.
ZHANG Cai-jun, GAO Li-na, HU Wen-jia, ZHU Li-guang. Intra-granular Ferrite Nucleation Model Induced by Normal Triple Prism Inclusions. Journal of Materials Engineering, 2017, 45(7): 27-33.
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http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2016.001558      或      http://jme.biam.ac.cn/CN/Y2017/V45/I7/27
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