金属学报  1984, Vol. 20 Issue (4): 279-285

论文 本期目录 | 过刊浏览 |

Fe-C马氏体价电子结构分析

张瑞林;余瑞璜

吉林大学及暨南大学;吉林大学及暨南大学

AN ANALYSIS OF VALENCE ELECTRON STRUCTURE OF Fe-C MARTENSITE

ZHANG Ruilin; YU Ruihuang (S. H. Yü) (Department of Physics; Jilin University; Changchun) (Manuscript received 27 May; 1983)

张瑞林;余瑞璜. Fe-C马氏体价电子结构分析[J]. 金属学报, 1984, 20(4): 279-285.
, . AN ANALYSIS OF VALENCE ELECTRON STRUCTURE OF Fe-C MARTENSITE[J]. Acta Metall Sin, 1984, 20(4): 279-285.

摘要 参考文献 相关文章 Metrics 全文: PDF(561 KB)   摘要: 利用“固体与分子经验电子理论”的BLD方法建立了Fe-C马氏体的价电子结构。碳原子连同其第1、2、3近邻Fe原子构成的小块形成含碳价电子结构单元;相应的不含碳的小块构成不含碳价电子结构单元,两者混乱分布构成马氏体晶体。对1.7wt-％C马氏体得出:含碳结构单元内Fe_Ⅰ,Fe_Ⅱ,Fe_Ⅲ分别在甲种杂化第11,10,8各阶,碳在第6阶;不含碳结构单元内Fe在甲种杂化第8阶。含碳结构单元内n_A=0.9991,n_B=0.8479;不含碳结构单元内n_A,n_B日与α-Fe相同。不同含碳量马氏体中只是两类结构单元相对数量不同。比较两类结构单元的n_A和n_B,立即看出马氏体硬度随含碳量增加而提高,这与实验事实一致。 Abstract：Based on the BLD method of the empirical electron theory of solids and molecules, the valence electron structure of Fe-C martensite was established. Each carbon atom making fractional covalent bonds with its 1st, 2nd and 3rd Fe neighbours forms a small cell to be called carbon involved unit. And the corresponding small cell of Fe atoms containing no carbon to be called no carbon unit. The martensite crystal structure is built upon by these two types of units. They distribute randomly in the martensite crystal. For the 1.7 wt-％ C martensite, the result shows: in the carbon involved units, there are three kinds of Fe atoms, Fe_Ⅰ, Fe_(Ⅱ) and Fe_(Ⅲ), on the 11th, 10th and 8th hybrid levels of A-type hybridization states of Fe respectively, and carbon atom is on its 6th hybrid level; in the no carbon units, the Fe is on the 8th level of A-type. In the carbon involved units, n_A=0.9991 and n_B=0.8479, and in the no carbon units, n_A and n_B have the same values as in α-Fe. The relative number of the two kinds of units changes with the content of carbon. Comparison of the values of n_A and n_B in the two kinds of units immediately shows that the hardness of martensite must increase with the content of carbon. This agrees with the experimental fact. 收稿日期: 1984-04-18      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 张瑞林 余瑞璜 44.8K 链接本文: https://www.ams.org.cn/CN/      或      https://www.ams.org.cn/CN/Y1984/V20/I4/279 1 Cohen,M.,Fandamentals of Martenstitic Reaction,中美冶金学术年会报告,北京,1981． 2 徐祖耀,马氏体相变与马氏体,科学出版社,1980． 3 余瑞璜,科学通报,23(1978) ,217． 4 余瑞璜,吉林大学自然科学学报,(1979) ,№ 4,54． 5 余瑞璜,科学通报,26(1981) ,206． 6 Pearsen, W. B., A Handbook of Lattice Spacings and Sturctures of Metals and Alloys, Pergamon Press, New York, 1958, p. 121． 7 De Cristofaro, N.; Kaplow, R., Metall. Trans., 8A (1977) , 35． 8 Choo, W. K.; Kaplow, R., Acta. Metall., 21 (1973) , 725． 9 余瑞璜,金属学报,18(1982) ,336． 10 Kurdjumov, G. V.; Khachaturyan, A. G., Acta Metall., 23 (1975) , 1077． 11 Pearsen, W. B., A Handbook of Lattice Spacings and Structures of Metals and Alloys, Pergamon Press, New York, 1958, p. 927． 12 余瑞璜,γ,γ’,ε,δ-Fe和Fe_3Si,Fe_4N,FeP的价电子结构分析,待发表. 13 Yensen, T. D., Trans. ASM, 27 (1939) , 797． 14 袁祖奎,Fe-Cr“σ相”价电子结构的分析,待发表. 15 余瑞璜,渗碳体(Fe_3C)价电子结构分析,待发表.s No related articles found! Viewed Full text Abstract Cited   Shared      Discussed