摘要:TWIP钢是实现“汽车轻量化”的发展趋势之一。冶炼该钢种需要很多热力学数据为基础,本课题就是为获得炉渣中热力学数据而做的实验研究。通过采用化学平衡法进行的实验得出:炉渣中(FeO)的活度系数随碱度的增加而降低,通过实验数据的回归分析得知,若不考虑(MnO)的存在,(FeO)活度系数和碱度的关系式可表达为γ_FeO=-0.3313((W_CaO+W_MgO)/W_(SiO_2 ) )^3+1.3711((W_CaO+W_MgO)/W_(SiO_2 ) )^2-1.8848 (W_CaO+W_MgO)/W_(SiO_2 ) +1.115,当考虑(MnO)对(FeO)的影响时,(FeO)活度系数和碱度的关系式可表达为γ_FeO=0.3267〖((W_CaO+W_MgO)/W_(SiO_2 ) )〗^3+1.3571〖((W_CaO+W_MgO)/W_(SiO_2 ) )〗^2-1.8727 (W_CaO+W_MgO)/W_(SiO_2 ) +1.1129。58059
毕业论文关键词: TWIP钢;碱度;FeO活度系数;炉渣
Study on the effect of basicity on the activity of FeO in slag
Abstract: TWIP steel is one of the development trends of “Automobile lightweight”.Smelt this steel needs a lot of thermodynamic datas as bases, this topic is an experimental study to obtain thermodynamic datas in slag. The experiments were carried out by using the chemical equilibrium method: The activity coefficient of FeO in slag decreased with the increase of alkalinity, with the regression analysis of the experimental data, we found that without consideration of MnO in slag, the relationship between activity coefficient of FeO in slag and alkalinity can be expressed γ_FeO=-0.3313((W_CaO+W_MgO)/W_(SiO_2 ) )^3+1.3711((W_CaO+W_MgO)/W_(SiO_2 ) )^2-1.8848 (W_CaO+W_MgO)/W_(SiO_2 ) +1.115, with consideration of MnO in slag, the relationship between activity coefficient of FeO in slag and alkalinity can be expressed γ_FeO=0.3267〖((W_CaO+W_MgO)/W_(SiO_2 ) )〗^3+1.3571〖((W_CaO+W_MgO)/W_(SiO_2 ) )〗^2-1.8727 (W_CaO+W_MgO)/W_(SiO_2 ) +1.1129.
KeyWords: TWIP steel;alkalinity;activity coefficient of FeO;slag
目 录
1 论文综述 1
1.1 前言 1
1.2 汽车用钢 1
1.2.1 国内外汽车行业用钢的发展 2
1.2.2 国内外汽车用钢的要求 3
1.2.3 汽车用钢标准 5
1.3 TWIP钢 5
1.3.1 TWIP钢的研究现状 5
1.3.2 TWIP钢的冶炼 8
2 实验方案 12
2.1 实验原理 12
2.1.1 金属Ag熔体中Mn的活度系数 12
2.1.2 渣中MnO的活度系数 13
2.1.3 渣中FeO的活度系数 14
2.2 实验设备 14
2.2.1 高温井式炉 14
2.2.2 温度控制仪 16
2.2.3 流量控制仪 17
2.2.4 储气瓶 17
3 实验过程 18
3.1 平衡时间的确定 18
3.2 熔渣中组分的活度系数及活度测定实验过程 18
4结果与分析 20
4.1 实验结果 20
4.2 数据处理与分析 20
4.2.1 γMnO的计算 20
4.2.2 γFeO的计算