不同温度下夹杂物特性的关联性研究

项目名称： 不同温度下夹杂物特性的关联性研究

项目编号： No.51304016

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 矿业工程

项目作者： 杨树峰

作者单位： 北京科技大学

项目金额： 25万元

中文摘要： 钢中夹杂物的控制是洁净钢生产的关键，科学的夹杂物检测分析方法对钢中夹杂物的有效控制具有重要的作用。目前还不能直接对高温钢水中的夹杂物进行直接检测，通常用冷却到常温下钢锭中夹杂物的检测结果来代替，而常温下钢锭中夹杂物的特性与高温钢液中夹杂物的特性有较大的区别，给夹杂物的分析带来偏差。 本项目首先采用热力学模型和数学仿真模拟研究夹杂物的成分与温度的关系、钢液降温及凝固过程中夹杂物的聚集长大和析出对夹杂物尺寸的影响，然后利用高温共聚焦显微镜（CSLM）对降温、凝固过程以及凝固后冷却过程对不同种类夹杂物进行全程原位动态观察；最后通过高温试验研究多相复合夹杂物形成的机理。 通过上述研究获得温度对夹杂物特性影响的规律，建立不同温度下夹杂物特性之间的内在联系，为进一步提高钢中非金属夹杂物的分析和检测的准确性奠定理论基础。

中文关键词： MnS夹杂物；冷却速率；关系模型；特性；

英文摘要： Control of inclusions in steel is the key to produce clean steel. So Scientific detection and analysis methods play important roles in the effective control of inclusions in steel. At present, detecting the inclusions directly in molten steel of high temperature can not be realized. It is a common way to detect inclusions of ingot which has cooled down to room temperature, however the characteristics of inclusions between room temperature and high-temperature molten steel are of difference considerably, causing deviation for analysis of inclusions. The project plans to adopt the means of thermodynamic model and mathematical simulation to study the relationship between inclusion composition and temperature, and to discuss the influences of inclusions precipitation, agggregation and grow up during colling and solidification process on the size, morphology, movement of inclusions. Then in order to observe different kinds of inclusions in entire processes consisting cooling, before and after solidification, CSLM will be employed. Finally the project will carry out some high-temperature experiments to research the formation mechanism of multiphase composite inclusions. Through the above research contents, the relationship between temperature and characteristics of inclusions can be revealed, meanwhile intrin

英文关键词： MnS inclusion；cooling rate；relationship model；characteristic；