含稀土元素的低碳高纯钢块状相变研究

Study on massive transformation of low carbon high purity steel containing rare earth elements

本实验主要研究以低碳高纯钢在加入稀土元素后块状相变的组织形貌和性能。其中对加入稀土元素和不加稀土元素的试样做对比。通过热处理工艺、金相法和JEM-2010电镜研究含稀土元素高纯钢的相变过程。稀土元素促进块状相变使γ→α多型性转变,铁素体晶界呈现不规则形貌,呈块状,有时候呈条片状或针状。

The microstructure and properties of low carbon high purity steel after adding rare earth elements were studied.The samples with and without rare earth elements are compared.The transformation process of high purity steel containing rare earth elements was studied by heat treatment process,metallographic method and JEM-2010 electron microscope.The results show that rare earth elements promote the massive transformation and make the γ→α polytype transformation.The ferrite grain boundary presents irregular morphology,which is massive,sometimes strip or needle like.