本文選題：超級奧氏體不銹鋼　切入點：元素偏析　出處：《材料熱處理學(xué)報》2015年04期

【摘要】：通過掃描電鏡(SEM)、透射電鏡(TEM)和能譜分析(EDS)等方法,研究了超級奧氏體不銹鋼Cr20Ni24Mo6N鋼凝固過程中的偏析行為,采用Thermo-Calc方法揭示了各相的析出規(guī)律,基于殘余偏析指數(shù)理論公式計算分析了合金元素的擴散規(guī)律,研究了均勻化參數(shù)對合金元素再分配的影響規(guī)律。結(jié)果表明:Cr20Ni24Mo6N鋼鑄錠存在嚴(yán)重的Mo元素偏析,主要析出相為σ相,殘余偏析指數(shù)隨加熱溫度的升高和保溫時間的延長而減小,元素偏析基本消除的均勻化參數(shù)為1250℃/24 h。
[Abstract]:The segregation behavior of super austenitic stainless steel Cr20Ni24Mo6N steel during solidification was studied by means of scanning electron microscope (SEM), transmission electron microscopy (TEM) and energy dispersive analysis (EDS). The precipitation law of each phase was revealed by Thermo-Calc method. Based on the theoretical formula of residual segregation index, the diffusion law of alloy elements is calculated and analyzed, and the influence of homogenization parameters on the redistribution of alloy elements is studied. The results show that there is a serious segregation of Mo elements in the steel ingot, and the main precipitated phase is 蟽 phase. The residual segregation index decreases with the increase of heating temperature and the prolongation of holding time, and the homogenization parameter of elemental segregation elimination is 1250 鈩，

本文編號：1669589