渗剂粒度和稀土元素对H13钢低温盐浴渗铬的影响

Effects of solvent grain-size and rare-earth element on low temperature salt-bath chromizing process of H13 steel

采用金相法、X射线衍射法、电子探针能谱分析和显微硬度法,研究了渗剂粒度和稀土元素对H13钢低温盐浴渗铬速度和渗铬层质量的影响,研究发现,减小渗剂粒度,可以提高渗铬速度;在渗剂中加入稀土元素,不但可提高渗铬速度、使渗层均匀,而且使渗层的显微硬度和铬的质量分数都有所增加。

The effects of different grain-size solvent and RE element on low temperature salt-bath chromizing process of H13 steel were studied by metallographic analysis, X-ray diffraction, electron probe energy spectrum analysis and microhardenss analysis. The results show that the two methods are effective to low temperature salt-bath chromizing process. If the solvent grain-size is decreased, the chromizing speed becomes high. If RE element is added to a chromizing solvent, the chromizing speed is raised, the chromizing layer turns uniform, and the microhardness and chromium concentration of chromizing layer is increased, respectively.