论文部分内容阅读
铌的析出和固溶对铸坯质量好坏和钢材性能优异具有非常明显的影响,通过计算钢中碳含量、氮含量、铌含量和温度对碳氮化铌固溶的影响,发现钢中碳、氮、铌含量增加,碳氮化铌的全固溶温度升高;氮含量增加,NbN的有效活度增加,固溶铌含量下降;铌含量增加,在温度为800～1100℃范围内,氮化铌的含量增加;碳含量增加,钢中固溶铌降低和铌的化合物增加.随温度升高,固溶铌与总铌含量的比值增加,二者比值位于30%～70%之间.
The precipitation and solution treatment of niobium have a very significant effect on the quality of the billet and the excellent performance of the steel. By calculating the influence of carbon content, nitrogen content, niobium content and temperature on the solid solution of niobium carbonitride, , The content of niobium and niobium increased, and the total solid solution temperature of niobium carbonitride increased. With the increase of nitrogen content, the effective activity of NbN increased and the content of solid solution niobium decreased. The content of niobium increased at the temperature of 800-1100 ℃, The content of niobium nitride increases; the content of niobium decreases and the content of niobium compounds increases with the increase of carbon content.With the increase of temperature, the ratio of solid solution niobium to total niobium content increases, the ratio between the two is between 30% and 70% .