(1. 蘭州理工大學(xué) 省部共建有色金屬先進(jìn)加工與再利用國家重點(diǎn)實(shí)驗(yàn)室，蘭州 730050；
2. 蘭州理工大學(xué) 材料科學(xué)與工程學(xué)院，蘭州 730050；
3. 大連理工大學(xué) 三束材料改性教育部重點(diǎn)實(shí)驗(yàn)室，大連 116024)
摘 要: 采用光學(xué)顯微鏡(OM)、掃描電子顯微鏡(SEM)、萬能材料試驗(yàn)機(jī)、渦流金屬電導(dǎo)儀等分析技術(shù)研究了30%、60%、90%變形量軋制與(450 ℃, 1 h)時(shí)效處理對Cu-1.0Cr-0.1Zr合金組織和性能的影響。結(jié)果表明：Cu-1.0Cr-0.1Zr合金經(jīng)適當(dāng)?shù)睦渥冃魏蜁r(shí)效處理，其力學(xué)性能和導(dǎo)電性能都顯著提高，在90%冷變形+(450 ℃, 1 h)時(shí)效后的綜合性能最好，其抗拉強(qiáng)度、屈服強(qiáng)度、硬度、伸長率和導(dǎo)電率分別達(dá)到411.7 MPa、364.69 MPa、127.6 HV、25.72%和63.7%IACS。通過顯微組織分析和理論計(jì)算可知，時(shí)效處理后，第二相的彌散析出是該合金獲得高強(qiáng)度的重要原因，同時(shí)合金元素大量析出，使導(dǎo)電主體(Cu基體)中固溶原子減少，進(jìn)而獲得了較高的導(dǎo)電率。
關(guān)鍵字: Cu-Cr-Zr合金；軋制；時(shí)效；微觀組織；力學(xué)性能；導(dǎo)電性能
（1. State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou 730050, China;
2. School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, China;
3. Key Laboratory of Materials Modification by Laser, Ion and Electron Beam, Ministry of Education, Dalian University of Technology, Dalian 116024, China）
Abstract:The effects of rolling with 30%, 60% and 90% deformation and aging treatment at 450 ℃ for 1 h on the microstructure and properties of Cu-1.0Cr-0.1Zr alloy were investigated by optical microscope (OM), scanning electron microscope (SEM), universal material testing machine, and eddy current metal conductivity instrument. The results show that the mechanical properties and electrical conductivity of Cu-1.0Cr-0.1Zr alloy are significantly improved after proper cold deformation and aging treatment. The comprehensive performance are the best after 90% cold deformation+(450 ℃, 1 h) aging, and the tensile strength, yield strength, hardness, elongation and electrical conductivity are 411.7 MPa, 364.69 MPa, 127.6 HV, 25.72% and 63.7%IACS, respectively. From the microstructure analysis and theoretical calculation, it is known that the dispersion precipitation of the second phase is an important reason for the high strength of the aged alloy, simultaneously, the large amount of precipitation reduces the number of solutes in the conductive main body (Cu matrix), and then higher conductivity is obtained.
Key words: Cu-Cr-Zr alloy; rolling; aging; microstructure; mechanical property; electrical conductivity
