M-EMS搅拌强度对钢轨钢MnS析出的影响研究

开展了M-EMS搅拌强度、硫质量分数对比工艺试验，采用Aspex分析了各工艺条件下钢轨特定位置MnS非金属夹杂的单颗粒长度尺寸及析出二维面积比例差异。结果表明：M-EMS搅拌强度越大，纯态较大尺寸的MnS非金属夹杂析出概率越大，复合态MnS非金属夹杂形核几率增加，同时也促进了较大尺寸的复合态MnS非金属夹杂形成；此外，硫质量分数较高的钢液更容易析出较大尺寸的纯态MnS非金属夹杂。降低钢液硫质量分数的基础上，增加形核质点并控制M-EMS搅拌强度可改善MnS非金属夹杂析出和分布。

Study on the effects of M-EMS stirring intensity on MnS separate in railway steel

The process contrast tests with M-EMS stirring intensity and S]% was carried out， MnS inclusion scanned and statistics with Aspex， make comparison among the different process for the same testing area after conversion and unified the results that about the length of single inclusion and ratio of inclusion area. Result shows lager possibility of big size pure MnS separated in the steel which content more sulfur； possibility of big size pure MnS separate increased with the greater stirring intensity； besides， nucleation possibility of compound state MnS increased， formation of bigger size compound MnS was promoted at the same time. Conclude that based on the control of low S]% to add nucleating agent while smelting and choose the proper stirring intensity could be helpful for MnS inclusion separate control， and improve the technological level of inclusion control in railway steel at last.