08F钢离子软氮化扩散层中γ'-Fe_4(C,N)形态及晶体学取向关系  

The morphology and crystallographic orientation of γ′-Fe_4(C,N) phase in diffusion layer of plasma nitrocarburized 08F steel

作　　者：何爱贵[1] 陈汪林[1] 伍翠兰[1] 

机构地区：[1]湖南大学材料科学与工程学院高分辨电镜中心,湖南长沙410082

出　　处：《电子显微学报》2012年第1期22-29,共8页Journal of Chinese Electron Microscopy Society

基　　金：国家自然科学基金资助项目(No.51071064)

摘　　要：利用扫描电子显微镜(SEM)和透射电子显微镜(TEM)研究了08F钢离子氮碳共渗扩散层中的γ'-Fe4(C,N)相的形态及其晶体学取向关系。结果表明,扩散层中的γ'-Fe4(C,N)相具有针状、片状和带状三种相貌。γ'-Fe4(C,N)相内部又分为层错型和非层错型两种,且含层错的γ'-Fe4(C,N)占多数。另外,γ'-Fe4(C,N)与α-Fe晶体学取向关系符合近似的N-W和K-S关系,即当[1 11]α//[101]γ'或者[100]α//[110]γ'时,则{110}α//{111}γ'+1.6°;当{110}α//{111}γ',则[1 11]α//[101]γ'+0.9°。The morphology and crystallographic orientation of γ′-Fe4（C,N） phase in diffusion layer of plasma nitrocarburized 08F steel were investigated using Transmission electron microscopy（TEM） and Scanning electron microscope（SEM）.It was found that γ′-Fe4（C,N） phase had two shapes,needle-like or rod-like and belt-like.Considering stacking faults in the inner of γ′-Fe4（C,N）,it was classified as stacking fault γ′-Fe4（C,N） and non-stacking fault γ′-Fe4（C,N）.The number of stacking fault γ′-Fe4（C,N） was more than that of non-stacking fault γ′-Fe4（C,N）.The crystallographic orientation relationship between γ′-Fe4（C,N） and α-Fe approximately agreed with the N-W and the K-S relationship by selected area electron diffraction pattern（SADP） except a little errors.The actual orientation relationship of γ′/α was described as α//γ′ or α//γ′,{110}α//{111}γ′＋1.6°;{110}α//{111}γ′,α// γ′＋0.9°.

关 键 词：离子氮碳共渗 γ'-Fe4(C N) 晶体学取向关系 08F钢 析出相 

分 类 号：TG142[一般工业技术—材料科学与工程] TG156.82[金属学及工艺—金属材料]