论文部分内容阅读
用X射线衍射仪、透射电子显微镜及穆斯堡尔谱仪分析了 Fe Cr C混合粉末经不同球磨时间机械合金化的相变趋势,以及不同含 C、Cr量对相变趋势的影响。研究表明,球磨时间及 C、Cr含量对机械合金化过程中相变趋势有重要影响。对Fe 13%Cr 8%C粉,球磨10 h,形成过饱和固溶体;球磨 20 h,有以(Fe,Cr)3C型碳化物为主的新相生成。当Cr=13%、C<5.7%时,球磨20 h,无新相析出,粉末原子一直处于扩散固溶状态;当C=5.7%、Cr>30%时,亦无新相析出,粉末逐步向非晶态转变。
The phase transformation of Fe Cr C mixed powders by mechanical milling at different ball milling times was analyzed by XRD, transmission electron microscopy and Mossbauer spectroscopy, and the effects of different C and Cr contents on the phase transformation were also analyzed. The results show that ball milling time and C, Cr content have an important influence on the phase transformation in the process of mechanical alloying. For Fe 13% Cr 8% C powder, ball milling for 10 h, the formation of supersaturated solid solution; milling 20 h, with (Fe, Cr) 3C carbide-based new phase formation. When Cr = 13%, C <5.7%, ball milling 20 h, no new phase precipitation, the powder atom has been in diffusion solid solution state; when C = 5.7%, Cr> 30%, no precipitation of new phase, To amorphous state transition.