合金元素在Fe-Mn-Al(Cr)-C系合金组织中的作用

Treatment Microstructure of Three Kinds of Fe-Mn-Al(Cr)-C Alloy

利用金相显微分析、X射线衍射分析、测量显微硬度和电子探针分析研究了Fe -Mn -Αl(Cr) -C系合金的固溶态组织 ,结果表明 ,含碳量在 0 3～ 0 38wt%时合金组织为单相铁素体组织 ;含碳量在 0 39～ 0 4 6wt%时组织为铁素体和奥氏体双相组织和少量的碳化物 (Cr ,Mn ,Fe) 7C3 ;含碳量在 1 1～ 2 0wt%时组织为单相奥氏体组织。合金元素在组织中分别起着不同的作用 ,Cr元素主要参与碳化物的形成 ,而Al、Mn元素的作用主要是固溶强化和稳定基体组织。

The microstructure of Fe-Mn-Al(Cr)-C alloy family under solid-solution is studied by metallurgraphic tests,XRD,measurements of hardness and TEM.The results show that the microstructure of the alloy is single-phase ferrite when the carbon content is between 0 3wt% and 0 38wt%,austenite and ferrite quarter phase system with a small amount of carbonization between 0 39wt% and 0 46wt%,and single-phase austenite between 1.1wt% and 2 0wt%.These alloy elements perform different functions respectively.