取向硅钢热力学平衡析出相的计算和分析

Thermodynamic calculation and analysis of equilibrium precipitation phaseof grain-oriented silicon steel

为了提高取向硅钢磁性能的稳定性,采用Thermo-Calc软件系统分析了取向硅钢基本合金元素C、Si、Mn、S、Al、N对γ相的转变温度、最大含量、最大含量对应温度,AlN和MnS固溶析出转变温度以及最大析出量的影响。计算结果表明:C含量增加,γ相的转变温度升高、最大含量增加、最大含量对应的温度也升高;Si含量增加,γ相的转变温度降低、最大含量减少、最大含量对应的温度降低;MnS相最大析出量主要受S含量的影响;AlN相最大析出量随N含量增加而大幅增加。

In order to improve the stability of magnetic properties of grain-oriented silicon steel,the effects of basic alloying elements C,Si,Mn,S,Al and N on theγphase transition temperature,theγphase maximum content and its corresponding temperature were analyzed by Thermo-Calc software system.And the effects to the precipitation temperature,maximum precipitation amount of AlN and MnS phases were also analyzed.The results showed that with the increase of C content,the transition temperature,the maximum content and the temperature corresponding to the maximum content ofγphase are all increased.With the increase of Si content,the transition temperature,the maximum content and the corresponding temperature of maximum content ofγphase are all decreased.The maximum precipitation amount of MnS phase is mainly affected by the content of S.The maximum precipitation of AlN phase is increased greatly with the increase of N content.