摘要:论文介绍了当代汽车用TWIP钢的成分、力学性能和当前TWIP的冶炼技术。TWIP钢优异的性能使其在汽车工业中具有极大的价值,而当前对TWIP冶炼方面的研究较少,因此希望通过实验来获取TWIP钢冶炼时所需的基本的热力学数据,为实际生产TWIP钢打下基础。实验主要采用化学平衡法研究MnO-FeO-SiO2-CaO-MgO渣系和金属Ag熔体与CO-CO2混合气体反应过程中金属Ag熔体中的Mn的含量,根据Mn含量的变化来判断反应达到平衡所需要的时间。平衡时间的确定是整个实验的预实验阶段,通过实验获得含MnO炉渣与银液反应过程中的平衡时间,正式实验中反应时间就是预实验中确定了的时间。通过对样品的检测分析,得出随着反应进行到12h时Mn在银溶液中的含量不再变化,因此确定反应达到平衡所需的时间为12h。通过作图法得知Mn与CO+CO2的氧化还原反应为2级反应。50269
毕业论文关键词:TWIP钢;炉渣;化学平衡法;反应平衡时间
Study on the equilibrium time of slag and silver liquid reaction
Abstract:This paper introduces the mechanical properties and current TWIP smelting technology of TWIP steel for automobile.It has great value in the automotive industry because of the excellent performance of TWIP steel.But the current research on TWIP smelting is few,we hope to obtain the basic thermodynamic data of TWIP steel smelting by experiment and lay the foundation for the actual production of TWIP steel.In the experiment, the chemical equilibrium method was used to study the content of Mn in metal Ag melt during the reaction of MnO-FeO-SiO2-CaO-MgO slag system and metal Ag melt with CO-CO2 mixture,according to the change of the content of Mn to judge the time needed to reach the equilibrium of the reaction.The determination of the equilibrium time is the pre experimental stage of the whole experiment.The equilibrium time of MnO slag and silver solution reaction was obtained by experiment, and the time required to complete the slag reaction was determined according to the results obtained after the experiment.Through the detection and analysis of the samples, it is concluded that the content of Mn in silver solution is not changed with the reaction to 12h, so the time required for the reaction to reach equilibrium is 12h.The redox reaction of Mn and CO+CO2 was found to be 2 level by mapping method.
keyword: TWIP steel; slag; chemical equilibrium method; reaction equilibrium time;
目 录
1 文献综述 1
1.1 汽车用钢的最新研究 1
1.1.1 汽车用结构材料的要求 1
1.1.2 汽车用钢研究状况 1
1.2 TWIP钢 2
1.2.1 TWIP钢的简介 2
1.2.2 TWIP钢的成分特点和性能特征 3
1.3 TWIP钢的冶炼 6
1.3.1 TWIP钢冶炼基本流程 6
1.3.2氩氧炉(AOD)冶炼 6
1.3.3真空炉(VOD)冶炼 9
1.3.4 AOD与VOD比较 10
1.4 熔渣 11
1.4.1 熔渣的概念 11
1.4.2 熔渣的性质 11
2 实验研究方法 12
2.1 课题研究内容及目的 12
2.1.1 研究目的 12
2.1.2 研究内容 12
2.2 主要实验设备和原材料