铸铁固气法铬硅共渗过程的热力学分析

The Thermodynamic Analysis of Solid-Gas Chromosiliconizing Process for Cast Iron

通过热力学分析和计算 ,表明固气法铬硅共渗过程初期以硅的渗入为主 ,硅的优先渗入为随后铬的扩散创造了条件。与单纯渗铬层相比 ,铸铁铬硅共渗层的连续性和致密性有所增强。

The result of thermodynamic calculations showed that Si takes precedence in entering the surface of cast iron at the beginning of chromosiliconizing, which has a good effect on later diffusion of Cr atoms.Compared with the chromizing layer,the chromosiliconizing layer on cast iron is more unifomrm and more compact.