在Gleeble-1500D热模拟试验机上对Cu-Cr-Zr合金和Cu-Cr-Zr-Ce合金在应变速率为0.001 ~10 s-1、变形温度为650 ~850℃的高温变形过程中的流变应力行为进行了研究.结果表明:流变应力随变形温度的升高而减小,随应变速率的提高而增大.从流变应力、应变速率和温度的相关性,利用逐步回归的方法建立了两种合金的流变应力方程.稀土元素Ce的加入能够细化Cu-Cr-Zr合金晶粒,而且能够促进Cu-Cr-Zr合金的动态再结晶.根据动态材料模型计算并分析了两种合金的热加工图,利用热加工图确定热变形的流变失稳区,并且获得了试验参数范围内热变形过程的最佳工艺参数,利用热加工图分析了两种合金不同区域的高温变形特征以及组织变化.对比分析后得出稀土元素Ce的加入能够优化Cu-Cr-Zr合金的热加工性能.
参考文献
[1] | 雷静果,刘平,赵冬梅,康布熙,田保红.用导电率研究Cu-Ni-Si-Cr合金时效早期相变动力学[J].材料热处理学报,2003(04):22-26. |
[2] | ZHANG Hui,ZHANG Hong-gang,LI Luo-xing .Hot deformation behavior of Cu-Fe-P alloys during compression at elevated temperatures[J].Journal of Materials Processing Technology,2009,209(6):2892-2896.,2009. |
[3] | Suzuki S,Shibutani N,Mimura K,et al .Improvement in strength and electrical conductivity of CuNiSi alloy by aging and cold rolling[J].Journal of Alloys and Compounds,2006,417 |
[4] | XIA Cheng-dong,JIA Yan-lin,ZHANG Wan,et al .Study of deformation and aging behaviors of a hot rolled-quenched Cu-Cr-Zr-Mg-Si alloy during thermomechanical treatments[J].Materials Design,2012,39 |
[5] | SU Juan-hua,DONG Qi-ming,LIU Ping,et al .Research on aging precipitation in a Cu-Cr-Zr-Mg alloy[J].Materials Science and Engineering A,2005,392:422-426.,2005. |
[6] | 毕莉明,刘平,陈小红,刘新宽,李伟,马凤仓.Cu-15%Cr-0.24%Zr合金的相分析[J].中国有色金属学报(英文版),2013(05):1342-1348. |
[7] | Correia J B,Davies H A,Sellars C M .Strengthening in rapidly solidified age hardened CuCr and CuCrZr alloys[J].Acta Materialia,1997,45(1):177-190.,1997. |
[8] | Hanzelka P,Musilova V,Kralik T,et al .Thermal conductivity of a CuCrZr alloy from 5 K to room temperatures[J].Cryogenics,2010,50:737-742.,2010. |
[9] | Jayakumar P K,Balasubramanian K,Rabindranath Tagore G .Recrystallisation and bonding behaviour of ultra fine grained copper and Cu-Cr-Zr alloy using ECAP[J].Materials Science and Engineer A,2012,538(15):7-13.,2012. |
[10] | 刘勇,刘平,田保红,李伟.微量RE对接触线用铜合金时效析出特性和软化温度的影响[J].中国稀土学报,2005(04):482-485. |
[11] | Zhang L,Li Z,Lei Q,et al .Hot deformation behavior of Cu-8.0Ni-1.8Si-0.15Mg alloy[J].Materials Science and Engineer A,2011,528(3):1641-1647.,2011. |
[12] | DENG Ying,YIN Zhi-min,HUANG Ji-wu .Hot deformation behavior and microstructural evolution of homogenized 7050aluminum alloy during compression at elevated temperature[J].Materials Science and Engineering A,2011,528 |
[13] | Momeni A,Dehghani K .Characterization of hot deformation behavior of 410 martensitic stainless steel using constitutive equations and processing maps[J].Materials Science and Engineering A,2010,527 |
[14] | Srinivasan N,Prasad Y V R K,RAO P R .Hot deformation behavior of Mg-3Al alloy study using processing map[J].Materials Science and Engineering A,2008,476(2):146-156.,2008. |
[15] | Gronostajski Z .The deformation processing map for control of microstructure in CuAl9.2Fe3 aluminium bronze[J].Journal of Materials Processing Technology,2002,125(9):119-124.,2002. |
[16] | Prasad Y V R K,Rao K P .Processing maps for hot deformation of rolled AZ31 magnesium alloy plate:Anisotropy of hot workability[J].Materials Science and Engineer A,2012,487:316-327.,2012. |
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