金属学报  1965, Vol. 8 Issue (1): 82-133

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18铬锰钛与18铬锰钼钢高温氰化层过冷奥氏体的转变

卢光熙

吉林工学院

THE TRANSFORMATION OF CYANIDED 18CrMnTi and 18CrMnMo STEELS

LU KUANG-HSI Kirin Institute of Technology

卢光熙. 18铬锰钛与18铬锰钼钢高温氰化层过冷奥氏体的转变[J]. 金属学报, 1965, 8(1): 82-133.
. THE TRANSFORMATION OF CYANIDED 18CrMnTi and 18CrMnMo STEELS[J]. Acta Metall Sin, 1965, 8(1): 82-133.

摘要 参考文献 相关文章 Metrics 全文: PDF(4004 KB)   摘要: 用金相法测定了18CrMnTi与18CrMnMo钢高温氰化层经860℃奥氏体化后的恒温C-曲线与马氏体开始转变温度M_H,同时也测定了A_1温度。为了探索氮对过冷奥氏体转变特性的影响,还将这两种钢进行了固体渗碳处理,使渗碳试样具有和高温氰化试样实际上相同的含碳量,然后将二者进行了平行试验。 实验结果指出:氰化试样较渗碳试样具有较低的A_1温度、高得多的M_H点、和过冷奥氏体在珠光体与异茵体区间转变时较短的孕育期。 实验中发现,在珠光体及上贝茵体形成之前,氰化试样中均有一种过剩相沿奥氏体晶粒边界析出。这种先析相可能是一种含氮的化合物,其析出为珠光体及上贝茵体的非自发形核提供了现成的有利界面,并使奥氏体合金化程度降低,因而加速了转变。 Abstract：The C-curves of the cyanided case of 18CrMnTi and 18CrMnMo steels austeni-tized at 860℃ were determined by metallographic methods. In order to investigate theinfluence of nitrogen on the transformation characteristics, carburized samples with prac-tically the same carbon content as the cyanided ones were also prepared and examined. The results show that the cyanided samples have lower A_1 temperatures, considerablyhigher M_s points and shorter incubation periods in both the pearlitic and bainitic regionsthan the carburized samples. It is found that before the pearlitic and upper-bainitic reactions, a pro-cutectoid orpro-bainitic phase is precipitated along the austenite grain boundaries in the cyanidedsamples; and it is thought that this is likely a nitrogen-bearing phase which provides thephase boundary effect for the nucleation of the reactions and impoverishes the parentaustenite in alloy content, thus accelerating the transformation of austenite. 收稿日期: 1965-01-18      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 卢光熙 44.8K 链接本文: https://www.ams.org.cn/CN/      或      https://www.ams.org.cn/CN/Y1965/V8/I1/82 [1] Houdremont, E., 1960, 2, 1418--1419, 1443--1447． [2] Rapatz, F., Mirt, O.: Stahl Eisen 1954, 1195． [3] Digges, T. G., Reinhart, F. M.: Trans. Am. Soc. Metals, 1948, 40． 1124． [4] Greninger, A. B., Troiano, A. R.: Trans. Am. Soc. Metals 1940, 28, 537． [5] #12 [6] Bose, B. N., Hawkes, M. F.: Trans, AIME 1950, 188． 307． [7] Просвирин,В.И,Энтин,С.Д.著,何忠治、欧阳可强译:马氏体的等温形成,(冶金工业出版社,1957年),6页. [8] Jolivet, H.: J. Iron Steel Inst., (London), 1939, 140, 95． [9] Lyman, T., Troiano, A. R.: Trans. Am. Soc. Metals, 1946, 37, 402． [10] Wever, F., Koch, W.: Stahl Eisen, 1954, 989． [11] #12 [12] Kehl, G. L.: The Principles of Metallographic Laboratory Practice, 3rd ed., (McGraw-Hill, 1949) , p. 417． No related articles found! Viewed Full text Abstract Cited   Shared      Discussed