等通道挤压制备铝单丝的有限元仿真研究

Finite Element Simulation Research of Processing Aluminum Wire by Equal Channel Angular Pressing

高强度及高导电性铝导线有助于提高输电线路安全性以及降低输送电能损耗,符合节约型社会发展需求。严重塑性变形技术能够细化晶粒尺寸,提高金属材料力学性能,但是晶粒尺寸细化在金属材料内部引入了大量晶界,增加了电子散射,从而降低了金属材料导电性。梯度结构金属材料能够结合多种结构金属材料优异的物理性能,实现铝导线高强度及高导电性。对传统等通道挤压装置进行优化改进,实现大变形与应变梯度相结合,为制备梯度结构铝导线提供了一种新的技术方案。

High-strength and high-conductivity aluminum wires help to improve the safety of transmission lines and reduce the loss of transmission power, in line with the needs of economical development. Severe plastic deformation technology can refine the grain size and improve the mechanical properties of the metal material, but the grain size refinement introduces a large number of grain boundaries inside the metal material, which increases the electron scattering, thereby reducing the conductivity of the metal material. The gradient structure metal material can combine the excellent physical properties of various structural metal materials to achieve high strength and high electrical conductivity of the aluminum wire. The traditional equal channel extrusion device has been optimized and improved, and the combination of large deformation and strain gradient has been realized, which provides a new technical solution for the preparation of gradient structure aluminum wire.