铁素体基Ti-Mo微合金钢单位纳米析出机制及控制方法

项目名称： 铁素体基Ti-Mo微合金钢单位纳米析出机制及控制方法

项目编号： No.51274036

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 矿业工程

项目作者： 蔡庆伍

作者单位： 北京科技大学

项目金额： 80万元

中文摘要： 铁素体基组织具有较高的组织稳定性和优良的塑韧性，但强度不足限制了在高强钢中的应用。传统纳米钢（<100nm）强化效果有限，如果将钢中微合金碳氮化物控制在单位纳米级（<10nm）,强化效果将大大增强。具有优良性能的全铁素体基Ti-Mo钢，在新一代核电、高层耐火建筑用钢中有着广泛的应用前景。最新资料表明，国内外对含Nb钢的研究较多，对全铁素体基Ti-Mo钢，特别是单位纳米钢的研究，由于理论研究不够深入，技术条件不够成熟，实属空白。因此探索全铁素体基Ti-Mo钢的单位纳米析出机理及控制方法非常必要。本项目采用优化成分设计，通过实验室控轧与热模拟相结合的方法，基于thermo-calc热力学和动力学计算，运用材料测试分析技术进行微观组织观察与理论分析，对组织演变进行控制，得到全铁素体Ti-Mo单位纳米钢。对析出物形核、长大、粗化机制进行分析，研究个位纳米粒子析出机理，为下一步生产应用奠定坚实的基础

中文关键词： Ti-Mo微合金钢；析出动力学；热稳定性；；

英文摘要： Ferrite has high microstructure stability and excellent toughness, but its strength is insufficient. Strengthening effect of traditional nanometer steel (<100nm) is limited. the strengthening effect will be greatly enhanced if the micro-alloy carbonitride control to units nanometer (<10nm). Ferrite matrix Ti-Mo steel with the excellent performance has a broad application prospects in the new generation of nuclear power steel, high-rise fire-resistant construction steel. The latest literature indicates that the research of Nb steel at home and abroad is more. Because technical method is not mature and theoretical research is not thorough sufficient, ferrite matrix Ti-Mo steel, especially units nanometer steel is blank. Therefore it is extremely necessary explore nanometer precipitation mechanism and control method of the ferrite matrix Ti-Mo steel. This project developed ferrite matrix unit nanometer steel, through which adopt optimizing component design, combination of laboratory thermo mechanical control process and thermal simulation. The research is based on the thermodynamic and kinetic calculations of thermo-calc software, and materials testing analysis techniques for the microstructure observation and theoretical analysis, This will lay a solid foundation for the next application of units nanometer steel t

英文关键词： Ti-Mo microalloyed steel；precipitation kinetics；thermostability；；