(1. 中南大學(xué) 材料科學(xué)與工程學(xué)院，長(zhǎng)沙 410083；2. 江西理工大學(xué) 材料與化學(xué)工程學(xué)院，贛州 341000)
摘 要: 通過對(duì)Cu-1.0Cr-0.2Zr合金固溶處理、冷軋以及隨后的時(shí)效處理工藝，研究形變及時(shí)效過程對(duì)材料力學(xué)性能、導(dǎo)電性能及其組織結(jié)構(gòu)的影響規(guī)律。結(jié)果表明：研究合金具有很強(qiáng)的時(shí)效強(qiáng)化效應(yīng)；時(shí)效前的預(yù)冷變形能顯著提高Cu-1.0Cr-0.2Zr合金的力學(xué)性能而保持較高的導(dǎo)電性；在最佳的形變熱處理工藝條件下其合金的抗拉強(qiáng)度和屈服強(qiáng)度分別達(dá)到了527.0和487.0 MPa，伸長(zhǎng)率為12.3%，電導(dǎo)率為82.0%IACS。合金力學(xué)性能的提高與電學(xué)性能的小幅降低主要是由時(shí)效過程的固溶體貧化、基體的回復(fù)與再結(jié)晶以及新相的析出三個(gè)因素控制，其中細(xì)小彌散均勻分布的析出相是獲得高的力學(xué)性能和導(dǎo)電性能的重要影響因素。
關(guān)鍵字: Cu-Cr-Zr合金；形變熱處理；顯微組織；導(dǎo)電性能
（1. School of Materials Science and Engineering, Central South University, Changsha 410083, China;2. School of Materials and Chemistry Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China）
Abstract:The effects of thermo-mechanical heat treatment processing on microstructure and properties of Cu-Cr-Zr alloy were studied. The hot rolled plates were solid solution treated and cold rolled followed by ageing treatments. The different ageing temperatures, ageing times and different reduction ratios of cold-rolled affect the mechanical and electrical properties of the alloy. The results show that the fine chromium and the second phase distributed in matrix were found in matrix. The ageing treatments affect the microstructure, strength and electrical conductivity of the alloy. In optimum treatment, the tensile strength, yield strength, elongation and electrical conductivity are of 527.0 MPa, 487.0 MPa, 14.2% and 82.0% IACS, respectively, which are controlled by recovery, recrystallization and precipitation, moreover, the fine second phase precipitation is the most important factor.
Key words: Cu-Cr-Zr alloy; thermo-mechanical treatment; microstructures; conductivity
