摘要
对工业纯铜在150℃条件下进行多向挤压,研究多向挤压工艺对纯铜组织和性能的影响。随着挤压道次的增加,材料晶粒得到明显细化,最终得到晶粒尺寸为微米级的等轴细晶组织。材料的显微硬度和抗拉强度在低道次挤压时迅速上升之后趋于饱和,延伸率在前期明显下降后也趋于稳定,其断裂性质仍是韧性断裂。经过15个道次挤压,晶粒平均尺寸达到0.78μm,抗拉强度达到485.5 MPa,显微硬度达129.4 HV0.2,断后延伸率为18.7%。
The effect of the multi-directional extrusion on the microstructure and mechanical peoperties of the pure copper is investigated by the multi-directional extrusion under 150 ℃. With the increase of extrusion passes, the grain size get refined obviously, eventually the grains are micro-grade and equiaxed crystalline. The microhardness and tensile strength is rapidly increased during the low strain and then tend to be stable, the elongation is apparently decreased firstly, and then trends to be stable, and the fracture property is still in ductile fracture. After 15 times extrusion, the average grain size is up to 0.78μm, the tensile Strength 485.5 MPa, the microhardness 129.4 HV0.2 and the elongation is 18.7%.
出处
《有色金属工程》
CAS
CSCD
北大核心
2016年第3期8-12,25,共6页
Nonferrous Metals Engineering
基金
国家科技重大专项项目(2012ZX04010101)
关键词
材料科学与工程
工业纯铜
多向挤压
显微组织
力学性能
material science and engineering
pure copper
multi-directional extrusion
microstruc- ture
mechanical properties
