摘要
为了探讨20CrMnTi钢的冷变形强化过程位错密度的分布与位错形态,采用X射线衍射法及多晶单线付氏分析理论。在实验基础上测量了不同应变量冷变形时20CrMnTi钢的位错密度,分析了应变量与位错密度及加工硬化的关系,利用透射电子显微镜对冷镦粗件的位错形态进行了观察.结果表明,位错密度随变形量的增加而提高,同时,随变形量增加加工硬化效果增强,晶体位错形态为"曲折"形位错线,应变量较大时位错呈胞状结构.
This paper analyses the density distribution and configuration of dislocation during the cold forming strengthen process of 20CrMnTi. This study can apply to practical production. By the way of X-ray diffraction method and Fourier's polycrystal single-line theory, the dislocation densities of 20CrMnTi are determined under different strains. Moreover, the dislocation mode of cold forging reduction pieces was observed with TEM. The results show that the dislocation density increases with the increase of the amount of deformation, and the larger the deformation, the more distinct the work hardening. In addition, crystal dislocation configuration is shown as 'tortous line'. When strain is large enough, dislocations are shown as crystiform sub-structure.
出处
《材料科学与工艺》
EI
CAS
CSCD
2004年第5期486-488,共3页
Materials Science and Technology
基金
国家"九五"科技攻关资助项目(96-A22-03-02)
