Zr含量对Cu-Ni-Si-Co-Zr合金热变形行为的影响  

Effect of Zr content on hot deformation behavior of Cu-Ni-Si-Co-Zr alloy

作　　者：周孟 饶劢攀 刘勇[1,2,3] 田保红 张毅[1,2,3] 杨鹏飞 ZHOU Meng;RAO Mai-pan;LIU Yong;TIAN Bao-hong;ZHANG Yi;YANG Peng-fei(School of Materials Science and Engineering,Henan University of Science and Technology,Luoyang 471023,China;Provincial and Ministerial Co-construction of Collaborative Innovation Center for Non-ferrous Metal New Materials and Advanced Pressing Technology,Luoyang 471023,China;Henan Province Key Laboratory of Nonferrous Materials Science and Processing Technology,Luoyang 471023,China)

机构地区：[1]河南科技大学材料科学与工程学院,河南洛阳471023 [2]有色金属新材料与先进加工技术省部共建协同创新中心,河南洛阳471023 [3]河南省有色金属材料科学与加工技术重点试验室,河南洛阳471023

出　　处：《材料热处理学报》2022年第11期180-189,共10页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金(52071134);河南省优秀人才创新基金(ZYQR201912164);河南省高校科技创新团队项目(22IRTSTHN001);河南省科学院科研开发专项(220910009)。

摘　　要：利用Gleeble-1500数控动态力学模拟试验机对Cu-Ni-Si-Co-Zr合金进行了热压缩试验,研究了合金在应变速率为0.01~10 s^(-1),变形温度为600~900℃,总压缩应变量为50%条件下的热变形行为,并研究了Zr含量对Cu-Ni-Si-Co-Zr合金热变形行为的影响。建立了Cu-1.52Ni-0.65Si-1.02Co-0.036Zr、Cu-1.55Ni-0.50Si-1.30Co-0.084Zr和Cu-1.56Ni-0.62Si-1.06Co-0.19Zr三种合金的本构方程。结果表明:合金的峰值应力随应变速率的增加和变形温度的降低而升高,并且Zr含量的增加能够提高合金的流变应力;基于Arrhenius双曲正弦本构关系得到了合金的峰值流变应力本构方程,计算结果表明Zr含量的增加能够提高合金的热激活能;对合金的微观组织进行观察与分析表明Zr含量的增加延缓了Cu-Ni-Si-Co-Zr合金的动态再结晶过程,使其在更高温度下发生。Hot compression test of Cu-Ni-Si-Co-Zr alloy was carried out with Gleeble-1500 numerical control dynamic mechanical simulation test machine.The hot deformation behavior of the alloy under the conditions of strain rate of 0.01-10 s^(-1),deformation temperature of 600-900℃,total compression strain of 50%was studied,and the effect of Zr content on the hot deformation behavior of the alloy was studied.The constitutive equations of Cu-1.52 Ni-0.65 Si-1.02 Co-0.036 Zr,Cu-1.55 Ni-0.50 Si-1.30 Co-0.084 Zr and Cu-1.56 Ni-0.62 Si-1.06 Co-0.19 Zr alloys were established.The results show that the peak stress of the alloy increases with the increase of strain rate and the decrease of deformation temperature,and the increase of Zr content can increase the flow stress of the alloy.Based on Arrhenius hyperbolic sinusoidal constitutive relation,the constitutive equation of peak flow stress of the alloy is obtained.The results show that the increase of Zr content can improve the hot activation energy of the alloy.The observation and analysis of the microstructure of the alloy show that the increase of Zr content delays the dynamic recrystallization process of the Cu-Ni-Si-Co-Zr alloy and makes it occur at a higher temperature.

关 键 词：Cu-Ni-Si-Co-Zr合金 热变形 流变应力 本构方程 

分 类 号：TG146.1[一般工业技术—材料科学与工程]