金属学报  1956, Vol. 1 Issue (3): 221-232

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铁碳系统的热力学研究——Ⅲ.铁碳相图介稳平衡部分的热力学分析

邹元爔

中国科学院冶金陶瓷研究所

A THERMODYNAMIC STUDY OF THE Fe-C SYSTEM Ⅲ.THE METASTABLE IRON-CEMENTITE EQUILIBRIUM

CHOU YUAN-HSI Institute of Metallurgy and Ceramics;Academia Sinica

邹元爔. 铁碳系统的热力学研究——Ⅲ.铁碳相图介稳平衡部分的热力学分析[J]. 金属学报, 1956, 1(3): 221-232.
. A THERMODYNAMIC STUDY OF THE Fe-C SYSTEM Ⅲ.THE METASTABLE IRON-CEMENTITE EQUILIBRIUM[J]. Acta Metall Sin, 1956, 1(3): 221-232.

摘要 参考文献 相关文章 Metrics 全文: PDF(847 KB)   摘要: 在本文中,作者首先计算了铁、碳化铁的共晶平衡,得出共晶温度为1148°;这在以前因为缺乏液态铁碳合金内的活度数据是不可能计算的。其次作者综合分析了前人数据,主要根据1148°的介稳共晶温度及723°的介稳共析温度,算出碳化铁的热力学函数。根据这样算出的碳化铁热力学函数及有关热力学数据,作者(i)复核了碳化铁的共析温度及共析点成分;(ii)计算了碳化铁在奥氏体内的溶解度;(iii)计算了碳化铁在铁液内的溶解度及碳化铁液相线与石墨液相线的相交温度。最后,根据本文及稳定平衡部分的计算结果,作者将现行铁碳相图加以修正,俾合于热力学的要求。但关于碳化铁在铁液内溶解度的计算仅属于初步近似性质,有待将来研究。 Abstract：Concluding this series on thermodynamic study of the Fe-C system,the presentpaper deals with an analysis of the metastable iron-cementite equilibrium on thebasis of the activity data derived previously by the author and the free energy ofcementite recalculated by the author in this paper.It has not been possible before to calculate the cementite eutectic temperaturedue to lack of data on activities in the liquid iron-carbon system.With the aid of the results of calculation in a previous paper,this temperature has been found tobe 1148°,or 5° below the graphite eutectic temperature.The cementite eutectoidtemperature 723°,determined by Mehl and Wells,is found to be consistent withthermodynamic requirements.Darken and Gurry chose 1146° as the cementite eutectic temperature andwith this value and certain other data calculated the free energy of cementite as afunction of temperature.On the basis of the more rigorously calculated cementiteeutectic temperature 1148° and the carefully determined cementite eutectoid tempe-rature 723° and certain other data,the free energy of cementite has been recal-culated by the author and found to be considerably different from Darken andGurry's results.The solubilities of cementite in austenite and in liquid iron respectively arethen calculated as functions of temperature.It should be pointed out,however,thatthe solubility of cementite in liquid iron thus calculated is only a first approximationand will certainly be revised in the future when more data on the free energy ofcementite at higher temperatures become available.A complete Fe-C equilibrium diagram including both stable and metastableequilibria has been constructed in the light of the results of this and a previouspaper.It is easily seen that certain important differences exist between the conven-tional and the revised diagrams. 收稿日期: 1956-03-18      服务 把本文推荐给朋友 加入引用管理器 E-mail Alert RSS 作者相关文章 邹元爔 44.8K 链接本文: https://www.ams.org.cn/CN/      或      https://www.ams.org.cn/CN/Y1956/V1/I3/221 [1] 邹元爔,金属学报,1(1) ,1(1956) . [2] Darken,L,S.and Gurry,R.W.,Trans.Am.Inst.Min.Met.Engrs.191,1015(1951) . [3] 邹元爔,金属学报,1(2) ,209(1956) . [4] Ruer,R.and Goerens,F.,Ferrum,14,161(1917) --文献[6] 内看到. [5] Kase,T.,Sci.Repts.Tohoku Imp.Univ.,Series 1,19,11(1930) --文献[6] 内看到. [6] Epstein,S.,The Alloys of Iron and Carbon,Vol.I,p.136--McGraw-Hill,New York(1936) . [7] Darken,L.S.and Smith,R.P.,Ind.Eng.Chem.,43,1815(1951) . [8] Umino,S.,Sci.Repts.Tohoku Imp.Univ.,Series 1,23,665(1835) --文献[2] 内看到. [9] Seltz,H.,McDonald,H.J.and Wells,C.,Trans.Am.Inst.Min.Met.Engrs.,14,263(1940) . [10] Browning,L.C.,Dewitt,T.W.and Emmett,P.H.,J.Am.Chem.Soc.,72,4211(1950) . [11] Mehl,R.F.and Wells,C.,Trans.Am.Inst.Min.Met.Engrs.125,429(1937) . [12] 渡濑武男,日本化学会会志,54,110(1933) . [13] Rossini,F.D.et al.,U.S.Nat.Bureau of Standards Circular,461(1947) . [14] Smith,R.P.,J.Am.Chem.Soc.,68,1163(1946) . [15] Wert,C.A.,Trans.Am.Inst.Min.Met.Engrs.188,1242(1950) . [16] Darken,L.S.and Gurry,R.W.,Physical Chemistry of Metals,p.401,McGraw-Hill,New York(1953) . [17] Hillert,M.,Acta Metallurgica,2(1) ,11(1954) . [18] Gurry,R.W.,Trans.Am.Inst.Min.Met.Engrs.150,147(1942) . [19] Wells,C.,Trans.Am.Soc.Metals,26,289(1938) . [20] Collette,G.and Jacque,L.,Comptes Rendus,236(9) ,1267(1953) . [21] Hillert,M.,Acta Metallurgica,3(1) ,37(1955) . [22] 文献[16] ,p.409-410． No related articles found! Viewed Full text Abstract Cited   Shared      Discussed