Ti-Mo微合金钢中TiN形成的热力学分析  

Thermodynamic Analysis of TiN Formation in Ti-Mo Microalloyed Steel

作　　者：亓伟伟 孙建卫 刘洪银 康佳 杨洪波[2] QI Weiwei;SUN Jianwei;LIU Hongyin;KANG Jia;YANG Hongbo(Technical Center of Laiwu Branch of Shandong Iron and Steel Co.,Ltd.,Jinan 271100,China;School of Metallurgical Engineering,Xi'an University of Architecture and Technology,Xi'an 710055,China)

机构地区：[1]山东钢铁股份有限公司莱芜分公司技术中心,山东济南271100 [2]西安建筑科技大学冶金工程学院,陕西西安710055

出　　处：《山东冶金》2022年第5期34-36,共3页Shandong Metallurgy

摘　　要：通过对Ti-Mo微合金钢中TiN形成的热力学计算,分析研究了Ti-Mo微合金钢中TiN粒子的形成规律。结果表明,TiN在液相线温度以上不可能析出;液相线和固相线之间形成TiN颗粒的最小浓度积分别为0.000114649(1797 K)和0.000200775(1742 K),两相区内减少TiN颗粒析出的最有效方法是当钢液温度降至液相线1797 K时,快速降温使其脱离两相区。在固相的整个温度范围内,TiN的实际溶度积远大于平衡溶度积,满足析出的热力学条件。Through the thermodynamic calculation of TiN formation in Ti-Mo microalloyed steel,the formation law of TiN particles in Ti-Mo microalloyed steel was analyzed and studied.The results show that TiN will not be precipitated above the liquidus;the minimum concentration products of TiN particles that will be formed between the liquidus and solidus are 0.000114649(1797 K)and 0.000200775(1742 K),respectively.Therefore,the most effective method to reduce the precipitation of TiN particles in the two-phase region is to rapidly reduce the temperature of molten steel to 1797 K,so that it can be separated from the two-phase region,thereby reducing the precipitation and growth of TiN particles.In the whole temperature range of solid phase,the actual solubility product of TiN is much larger than the equilibrium solubility product,thus satisfying the thermodynamic conditions of precipitation.

关 键 词：TIN Ti-Mo微合金钢 热力学 溶度积 

分 类 号：TG142.33[一般工业技术—材料科学与工程]