铜业工程Issue(6)：13-20,8.DOI:10.3969/j.issn.1009-3842.2023.06.002
两步低温轧制与时效工艺对Cu-Cr-Zr-Hf合金组织和性能的影响
Structure and Properties of Cu-Cr-Zr-Hf Alloy by Two-Step Cryogenic Rolling and Aging Process
摘要
Abstract
Cu-1Cr-0.2Zr-0.2Hf alloy was systematically prepared using a two-step cryogenic rolling and aging process(CⅡ).The micro-structure evolution of the as-rolled and aged samples of the alloy were thoroughly investigated through the electron backscattering dif-fraction(EBSD),scanning electron microscopy(SEM)and so on.The corresponding ultimate tensile strength and electrical conductivity were determined at the same time.The effects of cryogenic treatment and final aging on the evolution of orientation and properties of Cu-1Cr-0.2Zr-0.2Hf alloy were emphasized.The results showed that cryogenic rolling promoted the transformation of the alloy texture from a Copper-type texture to a Brass-type texture,and the formation of the Brass-type texture originates from the twinning of grains with Copper orientation and the subsequent slip.The final aging treatment did not change the texture type of the as-rolled sample,only the strength of the texture.The fracture of the two-step cryogenic rolling and aging process(CⅡ)samples had a large number of dim-ples and the fracture mode was typical of ductile fracture.The two-step cryogenic rolling and aging process prepared a high-strength and high-conductivity Cu-1Cr-0.2Zr-0.2Hf alloy with an ultimate tensile strength of 642±2 MPa and an electrical conductivity of 79.00±0.15%IACS(IACS:International Annealed Copper Standard),which provided a new strategy for the preparation of high-strength and high-conductivity copper alloys.关键词
Cu-1Cr-0.2Zr-0.2Hf/低温轧制/织构/高强高导Key words
Cu-1Cr-0.2Zr-0.2Hf/cryogenic rolling/texture/high-strength and high-conductivity分类
矿业与冶金引用本文复制引用
杨银,李仁庚..两步低温轧制与时效工艺对Cu-Cr-Zr-Hf合金组织和性能的影响[J].铜业工程,2023,(6):13-20,8.基金项目
国家自然科学基金项目(52001161)资助 （52001161）
