金属学报  1957, Vol. 2 Issue (1): 65-74

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硼对珠光体成核及成长的影响

李林;祁明维;郑庆祺;苗永智

中国科学院冶金陶瓷研究所;中国科学院冶金陶瓷研究所;南京大学物理系;南京大学物理系

THE EFFECT OF BORON ON THE NUCLEATION AND GROWTH OF PEARLITE

LEE LING;CHI MIN-WEI;CHUNG CHING-CHI;MEO YONG-TZE Institute of Metallurgy and Ceramics; Academia Sinica Nanking Unioersity; Department of Pkysics

李林;祁明维;郑庆祺;苗永智. 硼对珠光体成核及成长的影响[J]. 金属学报, 1957, 2(1): 65-74.
, , , . THE EFFECT OF BORON ON THE NUCLEATION AND GROWTH OF PEARLITE[J]. Acta Metall Sin, 1957, 2(1): 65-74.

摘要 参考文献 相关文章 Metrics 全文: PDF(756 KB)   摘要: 从实验结果证明,硼对珠光体的成核及成长是有影响的;在亚共析钢中硼促使珠光体的开始形成时间推迟,增长了珠光体成核的孕育期,但对成核率与时间的关系,在近于A_1温度(700℃)时,略为加速,而在珠光体转变速度最大的温度(650℃)时却没有影响。在共析钢中硼同样的使珠光体形成开始时间延迟,但对成核率与时间的关系没有改变,因此很可能硼促使奥氏体晶界能降低,珠光体得不到足够的能量成核,因而增加了奥氏作的稳定度。硼有加速珠光体成长率的作用,无论在亚共析或共析钢中皆有同样的现象产生。因此我们认为在珠光体形成温度范围内,硼虽使奥氏体转变开始时间推迟,但不影响转变终了时间的原因,是由于珠光体成长率加速所致。 Abstract：It was found in this investigation that boron exerted considerable influenceon the nucleation and growth of pearlite. In a hypoeutectoid steel, boron delayedthe starting time of pearlite formation at the maximum pearlite formation temp-erature. Boron did not effect the relation of nucleation rate with time butonly increased the incubation period for pearlite nucleation. In the eutectoidsteel, boron similarily delayed the starting time for the maximum pearlite formationtemperature, but did not effect the nucleation rate with time. It was postulatedthat the austenite grain boundary energy was probably lowered by boron atomsand that there were not enough energy for the formation of pearlite nucleusand thus increased the austenite stability. It was found by experiments thatboron increased the growth rate of pearlite, both in hypoeutectoid and eutectoidsteels. The authors proposed that within the temperatures range of pearlite formation,the reason why boron delayed the beginning of austenite transformation and notthe end of transformation was due to the increased rate of pearlite growth. 收稿日期: 1957-01-18      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 李林 祁明维 郑庆祺 苗永智 44.8K 链接本文: https://www.ams.org.cn/CN/      或      https://www.ams.org.cn/CN/Y1957/V2/I1/65 [1] Fisher, J. C., Influence of Boron on Hardenability of Steels, AIME, 1954, Vol. 200, p. 1146． [2] Wray, P. R., The Role of Boron Steels in the Present Emergency, Material and Methods, Aug., 1951． [3] Atlas of Isothermal Transformation Diagrams, 1951． [4] 李林,祁明维,硼-钼合金结构钢的研究,金属学报,第一卷,第三期,1956． [5] CCCP. [6] Spretnak, J. W. and Speiser, R., A Hypothesis for the Boron Hardenability Mechanism, ASM, 1954, Vol. 46, p. 1089． [7] Johnson, W. A. and Mehl, R. F., Reaction Kinetics in Process of Nucleation and Growth, AIME, 1939, Vol. 135, p. 416． [8] Simcoe, C. R., Elsea, A. R and Manning, G. K., Study of the Effect of Boron on the Decomposition of austenite, J. Metals, 1955, Jan., p. 193． [9] Rahrer, G. D. and Armstrong, C. D., The Effect of Carbon on the Hardenability of Boron Steels, A. S. M., 1948, Vol. 40, p. 1099． [10] Hull, F. C., Colton, R. A. and Mehl, R. F., Rate of Nucleation and Rate of Growth of Pearlite, AIME, 1942, Vol. 150, p. 185． [11] 1952, p. 260． [12] Zener, C., Kinetics of the Decomposition of austenite, Metals Technology, 1946, Jan. [13] 1955, p. 624． [14] Wells, C., Batz, W. and Mehl, R. F., Diffusion Coefficient of Carbon in austenite, AIME, 1950, Vol. 194, p. 533． No related articles found! Viewed Full text Abstract Cited   Shared      Discussed