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材料导报  2024, Vol. 38 Issue (24): 23080216-6    https://doi.org/10.11896/cldb.23080216
  金属与金属基复合材料 |
镁钛对包晶钢凝固过程中包晶转变收缩的影响
曹磊1, 杨依铭1, 王国承1,2,*
1 辽宁科技大学材料与冶金学院,辽宁 鞍山 114051
2 辽宁省高校冶金工程重点实验室,辽宁 鞍山 114051
Effect of Mg-Ti on Peritectic Transformation and Shrinkage During Solidification of Peritectic Steel
CAO Lei1, YANG Yiming1, WANG Guocheng1,2,*
1 School of Materials and Metallurgy, University of Science and Technology Liaoning, Anshan 114051, Liaoning, China
2 Liaoning Provinceial Key Laboratory of Metallurgy Engineering , Anshan 114051, Liaoning, China
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摘要 采用高温共聚焦激光扫描显微镜对包晶钢和含镁钛的包晶钢凝固过程中包晶转变现象进行原位观察。结果表明,在L → δ相变过程中,含镁钛的包晶钢从L相中析出的δ相的数量和尺寸均小于不含镁钛的包晶钢。在包晶反应阶段,含镁钛的包晶钢包晶反应开始温度比不含镁钛的包晶钢降低了12.3 ℃,降低了γ相的生成温度,抑制了γ相的长大。包晶转变收缩会导致表面粗糙度增大,通过表面粗糙度测定发现,含镁钛的包晶钢比不含镁钛的包晶钢表面粗糙度降低了10%。凝固收缩特性指数(RV)计算发现,平衡凝固和非平衡凝固条件下含镁钛的包晶钢的凝固特性指数比不含镁钛的包晶钢分别降低2.79%和3.25%。因此,镁钛处理是一种能有效降低包晶转变收缩,从而减轻表面裂纹发生的策略。
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曹磊
杨依铭
王国承
关键词:  包晶钢  包晶相变  原位观察  镁钛处理    
Abstract: Using a high-temperature confocal laser scanning microscope, in-situ observation of the peritectic transformation phenomenon during the soli-dification process of peritectic steel and peritectic steel containing Mg-Ti was carried out. During the phase transition from L to δ, the number and size of δ phase precipitated from the L phase in peritectic steel containing Mg-Ti were smaller than those in peritectic steel without Mg-Ti. In the peritectic reaction stage, the starting temperature of the peritectic reaction of peritectic steel containing Mg-Ti was 12.3 ℃ lower than that of peritectic steel without Mg-Ti, which reduced the formation temperature of phase γ and inhibited its growth. The shrinkage of peritectic transformation should lead to an increase in surface roughness. Through surface roughness measurement, it was found that the surface roughness of peritectic steel containing Mg-Ti was reduced by 10% compared to peritectic steel without Mg-Ti. The solidification shrinkage characteristic index (RV) calculation found that under equilibrium and non-equilibrium solidification conditions, the solidification shrinkage characteristic index of peritectic steel containing Mg-Ti decreased by 2.79% and 3.25% compared to peritectic steel without Mg-Ti, respectively. Therefore, Mg-Ti treatment is an effective strategy to reduce peritectic transformation shrinkage, and thus alleviates the occurrence of surface cracks.
Key words:  peritectic steel    peritectic phase transition    in situ observation    Mg-Ti treatment
出版日期:  2024-12-25      发布日期:  2024-12-20
ZTFLH:  TG142.33  
基金资助: 国家自然科学基金(52174318)
通讯作者:  * 王国承,辽宁科技大学教授,博士生导师。2013 年7 月至今,辽宁科技大学冶金工程系教授,在国际冶金领域最早提出和论证金属熔体中固体生成的二步形核理论,将二步形核理论和第一性原理计算预测应用于钢中夹杂物/析出相形成的非平衡过程,揭示原子-分子-团簇-颗粒尺度的形核和长大行为;提出钢中夹杂物结构无序化调控细化技术,发现高铝钢中氧化铝夹杂物环状聚集新形态。多相分配高效脱磷和少渣冶炼新工艺应用于 80 吨转炉。钢中夹杂物/析出物无损伤提取和分析技术先后应用于多家研究所和钢铁企业。先后主持国家自然科学基金、省级和企业等课题 10 余项;以第一或通信作者发表论文 60 余篇,其中 SCI 收录论文 30 余篇。先后为Scientific Reports、MMTB、Steel Research International、Journal of Iron and Steel Research International、《钢铁》等国内外期刊审稿。 wang_guocheng@163.com   
作者简介:  曹磊,2017年7月、2020年3月分别于辽宁科技学院和辽宁科技大学获得工学学士学位和硕士学位。现为辽宁科技大学材料与冶金学院博士研究生,在王国承教授的指导下进行研究。目前主要研究领域为Fe-Mn-Al-C系高铝钢精炼和夹杂物的控制、液-固复合铸造、镁钛处理低碳钢和包晶钢材表面质量的提升。
引用本文:    
曹磊, 杨依铭, 王国承. 镁钛对包晶钢凝固过程中包晶转变收缩的影响[J]. 材料导报, 2024, 38(24): 23080216-6.
CAO Lei, YANG Yiming, WANG Guocheng. Effect of Mg-Ti on Peritectic Transformation and Shrinkage During Solidification of Peritectic Steel. Materials Reports, 2024, 38(24): 23080216-6.
链接本文:  
http://www.mater-rep.com/CN/10.11896/cldb.23080216  或          http://www.mater-rep.com/CN/Y2024/V38/I24/23080216
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