摘要
研究了纯铜等径角挤压后的组织及性能。结果表明:室温下BC方式10道次ECAP(Equal Chan-nel Angular Pressing)后,得到均匀、细小的等轴晶,平均晶粒尺寸为0.75μm,硬度从78.7 HV上升到185.3 HV。通过对不同ECAP道次后的退火试样的硬度测量和观察组织发现,ECAP 8道次试样在433 K发生静态再结晶,且随ECAP道次的增加,开始再结晶的温度降低,再结晶软化的速率增加。说明大变形后纯铜的热稳定性下降。
The microstructure and the properties of pure copper fabricated by ECAP（Equal Channel Angular Pressing） are investigated. Uniform and fine equiaxed grains with the size of 0.75 μm are created after 10 times ECAP by route Bc at room temperature. The microhardness can increase from 78.7HV to 185.3HV. By measuring the microhardness and observing the microstructure of the sample in each ECAP,the static recrysT tallization occurs at 433K after 8 times ECAP. Then the onset temperature of recrystallization drops and the softening rate increases with ECAP times. Results show that the thermal stability will drop after severe plastic deformation.
出处
《江苏科技大学学报（自然科学版）》
CAS
北大核心
2006年第2期85-88,共4页
Journal of Jiangsu University of Science and Technology:Natural Science Edition
基金
校青年基金资助项目(2004CL018J)
关键词
ECAP
纯铜
再结晶
组织热稳定性
equal channel angular pressing
pure copper
recrystallation
thermal stability
