【作者】 郭锋； 林勤； 孙学义；

【Author】 Guo Feng~*, Lin Qin, Sun Xueyi(Physical Chemistry Department, University of Science and Technology Beijing, Beijing 100083, China)

【机构】 北京科技大学物理化学系；

【摘要】 利用微观偏析和化学反应相耦合的计算方法,对稀土碳锰纯净钢中的La、P在体系凝固过程的偏析和化学反应进行了计算。结果表明,液相中的La和P将随固相率的增加而富集,当La的含量大于0.018mass%时,在凝固的后期将形成LaP。镧的含量对LaP的析出量和磷的偏析程度有很大的影响,LaP随镧含量的增加而增多,而磷的偏析程度减小。微观分析发现了晶界处含La、P化合物的存在。更多还原

【Abstract】 The coupling calculation method about segregation and reaction were made on carbon-manganese purity steels with rare earth to study the behavior of elements La and P during solidification. The result shows that La and P in the liquid would enrich, LaP would form in the terminal stage if the content of La is more then 0.018mass%, the final amount of LaP would increase and concentration of P decrease as rise of La. The compound that contain element La, P has be observed in the grain boundary through SEM.更多还原