| 超低氧车轮钢中TiN夹杂析出的热力学分析及控制 |
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| 引用本文： | 杨俊,王新华,龚志翔,姜敏,汪国才,黄福祥.超低氧车轮钢中TiN夹杂析出的热力学分析及控制[J].北京科技大学学报,2010,32(9). |
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| 作者姓名： | 杨俊 王新华 龚志翔 姜敏 汪国才 黄福祥 |
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| 作者单位： | 1. 北京科技大学冶金与生态工程学院,北京,100083
2. 马鞍山钢铁股份有限公司技术中心,马鞍山,243011 |
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| 基金项目： | 国家重点基础研究发展计划资助项目 |
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| 摘 要： | 通过对高速车轮钢中TiN夹杂物析出进行热力学分析,得到了车轮钢的液相线和固相线温度及1873K时Ti、N的活度.对TiN生成反应和钢中Ti、N溶度积进行了计算.结果表明:TiN只能在固相中生成,但在本车轮钢Ti、N含量下,固相中也没有TiN生成的条件,只有在钢液凝固前沿,由于Ti、N在两相区的富集,TiN夹杂物的生成反应得以进行.因此,在生产中,适当提高连铸二冷的冷却速率,使钢液快速凝固,减少凝固前沿Ti、N的富集时间,可减少纯TiN的析出.对本实验车轮钢中TiN夹杂的检测结果进行计算分析可知,在正常生产时铸坯冷却速率条件下,将钢中Ti的质量分数控制在3.5×10-5以下、N的质量分数控制在3.1×10-5以下,理论上可以消除TiN夹杂物的析出,改善车轮钢的疲劳性能,提高车轮的使用寿命.
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| 关 键 词： | 铁路车轮 炼钢 氮化钛 夹杂物 热力学 溶度积 |
Precipitation thermodynamics analysis and control of titanium nitride inclusions in extra-low oxygen wheel steel |
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| YANG Jun,WANG Xin-hua,GONG Zhi-xiang,JIANG Min,WANG Guo-cai,HUANG Fu-xiang.Precipitation thermodynamics analysis and control of titanium nitride inclusions in extra-low oxygen wheel steel[J].Journal of University of Science and Technology Beijing,2010,32(9). |
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| Authors: | YANG Jun WANG Xin-hua GONG Zhi-xiang JIANG Min WANG Guo-cai HUANG Fu-xiang |
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| Institution: | YANG Jun1),WANG Xin-hua1),GONG Zhi-xiang2),JIANG Min1),WANG Guo-cai2),HUANG Fu-xiang1)1) School of Metallurgical , Ecological Engineering,University of Science , Technology Beijing,Beijing 100083,China2) Technology Center of Ma'anshan Iron , Steel Company Limited,Ma'anshan 243011,China |
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| Abstract: | The liquidus and solidus temperatures and the Ti and N activities of high speed wheel steel at 1 873 K were obtained by thermomechanically analyzing the precipitation of TiN inclusions.The formation reaction of TiN and the solubility product of Ti and N in the steel were calculated,and the results show that TiN inclusions only form in solid phase,but under the chemical composition of this wheel steel,TiN inclusions can not be produced in solid phase.Only in a solidification front,the formation reaction of T... |
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| Keywords: | railway wheels steelmaking titanium nitride inclusions thermodynamics solubility product |
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