金属学报  1957, Vol. 2 Issue (4): 367-375

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铬钢在珠光体转变时的碳化物形成过程

张沛霖;梁志德

中国科学院金属研究所;东北工学院

PROCESS OF CARBIDE PORMATION DURING AUSTENITEPEARLITE TRANSFORMATION IN CHROMIUM STEELS

CHANG PEI-LIN;LIANG TZE-TEH Institute of Metal Research; Academia Sinica North-East Engineering College

张沛霖;梁志德. 铬钢在珠光体转变时的碳化物形成过程[J]. 金属学报, 1957, 2(4): 367-375.
, . PROCESS OF CARBIDE PORMATION DURING AUSTENITEPEARLITE TRANSFORMATION IN CHROMIUM STEELS[J]. Acta Metall Sin, 1957, 2(4): 367-375.

摘要 参考文献 相关文章 Metrics 全文: PDF(739 KB)   摘要: 研究了四种高铬钢在恒温分解为珠光体时的碳化物形成过程。对所得结果和其他作者的结果进行了分析,得到统一的规律。 在铬钢中,珠光体转变时可以直接形成(Fe,Cr)_3C,(Cr,Fe)_7C_3或(Cr,Fe)_(23)C_6。但是,不同类型碳化物的形成并不决定于平衡图上所要求的碳化物类型,而决定于奥氏体中的Cr:C比值。Cr:C比值对碳化物成核的过程起着主导的作用。 Abstract：The process of carbide formation during isothermal decomposition of austeniteinto pearlite in four chromium steels has been investigated by X-ray method. Theexperimental results are analysed and compared with results obtained by otherauthors on chromium steels of various compositions, and unified conclusions aredrawn. 1) Depending upon the composition of steels, the initial carbide formed duringisothermal formation of pearlite may be cementite, (Cr, Fe)_7C_3 or (Cr, Fe)_(23)C_6.That is, special carbides can be formed directly from austenite, and they are notalways products of secondary process as some authors believe. 2) Type of carbides to be formed directly from austenite is not determined bythe requirements of equilibrium diagram, but depends upon Cr: C ratio in austenite.When the atom ratio Cr: C is smaller than 2, the initial carbide is cementite; whenthe ratio lies between 2 and 13, the initial carbide is (Cr, Fe)_7C_3; when the ratiois larger than 13, it is (Cr, Fe)_(23)C_6. It seems that the Cr:C ratio in austenite hasdecided influence on the kinetics of nucleation of different carbides. 3) When the type of carbides formed directly from austenite is not that re-quired by the equilibrium diagram, carbide transformation takes place as a secondaryprocess. 4) When the directly formed carbide is an alloy carbide, i. e. (Cr, Fe)_7C_3 or(Cr, Fe)_23C_6, diffusion of chromium in austenite immediately in front of the growingnodules of pearlite is a necessary process during transformation. 收稿日期: 1957-04-18      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 张沛霖 梁志德 44.8K 链接本文: https://www.ams.org.cn/CN/      或      https://www.ams.org.cn/CN/Y1957/V2/I4/367 [1] Mehl, R. F., Hardenability of Alloy Steels, ASM (1938) , 1． [2] Bowman, F. E., Trans. ASM, 35 (1945) , 112． [3] Hultgren, A., Trans. ASM, 39 (1947) , 315． [4] Hollomon, J. H., Discussion of Bowman's Paper, Trans. ASM, 36 (1946) , 78． [5] Zener, C., Trans. AIME, 167 (1946) , 550． [6] Wever, F. & Koch, W., Stahl & Eisett, 74 (1954) , 989． [7] Блантер, 4 (1955) , 1． [8] Энтин, Р. Н., (1955) , 239． [9] Энтин, Р. Н., 9 (1956) , 3; 10 (1956) , 20． [10] Метт, Б. Ю., 72, № 3 (1950) , 497． [11] Lyman, T. & Troiano, A. R., Trans. AIME, 162 (1945) , 196． [12] Crafts, W. & Lamont, J. L., Trans. AIME, 185 (1949) , 957． [13] Блантер, М. Е., 8, №4 (1948) , 529． [14] Wever, F. & Koch, W., Arch. Eisenhuttenw., 21 (1950) , 143． [15] Метт, Б. Ю., (1951) , 193． [16] Цивинский, С. В., (1955) , 277． [17] Kuo, Kehsin (郭可信) and Hultgren, A., Revue de Metallurgie, 5O (1953) , 847． [18] Kuo, Kehsin (郭可信), J. Iron Steel Iust., 173 (1953) , 363． [19] Medl, R. F. and Hagel, W. C., Progress in Metal Physics, 6 (1956) , 74． [20] Lyman, T. and Troiano, A. R., Trans. ASM, 37 (1946) , 402． [21] Bowers, J. E., J. Iron Steel Inst., 183 (1956) 268 No related articles found! Viewed Full text Abstract Cited   Shared      Discussed