大拉铜线冷拉拔过程组织及性能研究  

The Research of Mary Copper Wire Drawing Process on Organization and Properties

作　　者：王余强[1] 刘劲松[1,2] 赵天章[3] 张士宏[2] 

机构地区：[1]沈阳理工大学材料科学与工程学院,沈阳110159 [2]中国科学院金属研究所,沈阳110016 [3]沈阳航空航天大学航空制造工艺数字化国防重点实验室,沈阳110136

出　　处：《沈阳理工大学学报》2016年第5期78-81,86,共5页Journal of Shenyang Ligong University

摘　　要：研究了强冷变形条件下铜线材的组织性能变化,探讨了其影响机制。研究结果表明：拉拔变形对铜线材硬度和导电率的影响趋势基本相反,当真应变小于0.3时,硬度快速上升,导电率快速下降;当真应变为0.3-0.8时,硬度缓慢上升,导电率变化不大;当真应变大于0.8时,导电率和硬度都出现了波动。当真应变小于0.8时,抗拉强度迅速提高,延伸率急剧降低;当真应变大于0.8时,抗拉强度缓慢提高,延伸率缓慢降低,都逐渐趋于稳定。微观组织观察表明：纯铜的组织变化过程有3个阶段：晶粒开始细化并出现形变孪晶;晶粒细化加剧,晶界变的模糊;形成纤维组织。Microstructure and properties of copper wire in the condition of strong cold deformation were investigated, and the mechanism of its influence is discussed. The research results show that the influence of drawing deformation on the hardness and conductivity of copper wire is basically opposite. When the true strain is less than 0. 3, the hardness increases rapidly and the conductivity decreases rapidly. When the true strain is 0. 3 - 0. 8, the hardness slowly rises ,the conductivity change is small. When the true strain is greater than 0. 8, the electric conductivity and hardness of the strain are fluctuating. When the strain is less than 0. 8, the tensile strength increases rapidly, the extensibility decreases sharply. When the true strain is greater than O. 8, the tensile strength increases slowly, and the extensibility decreases slowly, and they tend to be stable. Microstructure observation shows that Copper organization of the change process has three stages ： grain begining to refine and deformation twins appearing;grain refinement increasing ,the grain boundaries becoming blurred;fibrous tissue being formed.

关 键 词：导电率 硬度 真应变 纤维组织 

分 类 号：TG356.4[金属学及工艺—金属压力加工] TG359