FeCrAl不锈钢的平衡凝固相变与析出行为

发布时间：2018-03-03 11:36

  本文选题：FeCrAl不锈钢　切入点：Thermo-Calc　出处：《工程科学学报》2017年05期 　论文类型：期刊论文

【摘要】：借助Thermo-calc软件对FeCrAl不锈钢所属的Fe-(18~21)Cr-(3~5)Al-(0~0.03)C-(0~0.2)Si-(0~0.2)Mn多元体系在凝固过程中的相变及析出行为进行了研究.采用Thermo-calc中TCFE7数据库对该体系的垂直截面图进行计算,分析了不同组元对凝固和冷却过程中相变的影响,并得到FeCrAl不锈钢的平衡凝固相变路径图.结果表明FeCrAl不锈钢由1600℃平衡冷却至300℃的过程中完整的平衡相变路径为:L→AlN+αδFe→AlN+αδFe+Cr_7C_3→AlN+αδFe+Cr_7C_3+Cr_(23)C_6→AlN+αδFe+Cr_(23)C_6→AlN+αδFe+Cr_(23)C_6+σ→AlN+αδFe+Cr_(23)C_6+σ+α'→AlN+αδFe+Cr_(23)C_6+α'.凝固过程中Cr_7C_3与σ相是否析出分别取决于体系中C、Si含量;Al含量的提高可扩大αδFe+Cr_7C_3的稳定区,降低α'相的析出温度,抑制σ相的析出;Cr含量的提高可以减小αδFe+Cr_7C_3的稳定区,扩大σ相和α'相的稳定区.
[Abstract]:The phase transformation and precipitation behavior of the Fe-(18~21)Cr-(3~5)Al-(0~0.03)C-(0~0.2)Si-(0~0.2)Mn multicomponent system of FeCrAl stainless steel during solidification were studied by means of Thermo-calc software. The vertical sections of the system were calculated by using the TCFE7 database in Thermo-calc. The effect of different components on the phase transformation during solidification and cooling was analyzed, and the equilibrium solidification path diagram of FeCrAl stainless steel was obtained. The results showed that the complete equilibrium phase transition path of FeCrAl stainless steel from 1600 鈩，

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