室温形变对γ-Fe中^(14)C的扩散系数影响  

EFFECT OF ROOM-TEMPERATURE ROLLINGON DIFFUSION COEFFICIENT OF ^(14)C IN γ-Fe

作　　者：安希(山庸) 郑富仕[1] 郭曼久 沈淙 易涛 马静 程永桂 

机构地区：[1]哈尔滨工业大学 [2]钢铁研究总院 [3]齐齐哈尔齿轮厂

出　　处：《钢铁》1989年第1期41-44,共4页Iron and Steel

摘　　要：采用放射性同位素技术测定了在渗^(14)C过程中^(14)C在不同量室温形变工业纯铁奥氏体中的扩散系数,并对渗层进行自射线照相。结果表明:形变30％能明显增大^(14)C在γ-Fe中的扩散系数,提高渗^(14)C速度;透射电镜分析结果表明形变30 ％能增大材料中的位错密度,促进^(14)C的扩散过程。In this paper, the diffusion coefficients of the ^(14)C in austenite of armco iron specimens vari-ously cold deformed were investigated by using the radioisotope technique, and it was autora-diographed on the carburization surface layer. The experimental results show that room-tempe-rature deformation of 30% can increase notablely the diffusion coefficients of the ^(14)C in auste-nite and the carburization rate. TEM study indicatsi that room-temperature deformation of 30%increases the dislocation density in the material, so that it promotes diffusion process of the^(14)C in austenite.

关 键 词：室温形变 γ-Fe 碳14 扩散系数 

分 类 号：TG151.4[金属学及工艺—热处理]