Y对Al-Zr合金微观组织与性能的影响  

Effects of Y Addition on the Microstructure and Properties of Al-Zr Alloy

作　　者：陈保安 赵丽丽 张静媛 李新 王瑞红[3] 潘学东 祝志祥 丁一 张强 陈新 韩钰 杨长龙[4] 谭澈[4] Chen Baoan;Zhao Lili;Zhang Jingyuan;Li Xin;Wang Ruihong;Pan Xuedong;Zhu Zhixiang;Ding Yi;Zhang Qiang;Chen Xin;Han Yu;Yang Changlong;Tan Che(State Key Laboratory of Advanced Power Transmission Technology,Global Energy Interconnection Research Institute Co.,Ltd.;Department of Electrical Engineering New Materials,Global Energy Interconnection Research Institute Co.,Ltd.;School of Materials Science and Engineering,Xi’an University of Technology;Shenyang Electric Power Supply Company,State Grid Liaoning Electric Power Supply Co.,Ltd.)

机构地区：[1]全球能源互联网研究院有限公司先进输电技术国家重点实验室,北京102209 [2]全球能源互联网研究院有限公司电工新材料研究所,北京102209 [3]西安理工大学材料科学与工程学院 [4]国网辽宁省电力有限公司沈阳供电公司

出　　处：《特种铸造及有色合金》2021年第1期68-72,共5页Special Casting & Nonferrous Alloys

基　　金：国家电网有限公司总部科技项目资助项目(SGGR0000DWJS1800175)。

摘　　要：研究了不同Y含量(0.02%,0.05%,0.10%)对Al-0.16Zr合金铸态、轧制态和时效态的微观组织、硬度和电导率的影响。结果表明,Y含量为0.05%和0.10%时,能显著的细化合金晶粒。随着Y含量增加,晶粒细化效果逐渐增强。铸态Al-0.16Zr合金在350℃时效过程中,Y添加具有显著的时效强化效果,Y含量越高,达到峰值时效所需时间越短。但是由于共格Al3Zr沉淀相的析出,点阵失配畸变场的存在将导致合金电导率降低。而在轧制态合金的时效过程中,位错密度的降低引起退火软化,但是Y的添加仍明显提高了合金的硬度。综合考虑,轧制态Al-0.16Zr-0.10Y合金经350℃×30h时效后具有最优的硬度和电导率。The effects of Y addition(0.02,0.05,and 0.10%)on microstructure,mechanical properties,electrical properties of Al-0.16 Zr alloy were investigated.The results indicate that 0.05%and 0.10%Y addition can remarkably refine the grain size,and within range of the Y addition,the refinement becomes more effective with Y addition increase.During the aging treatment of as-cast alloys at 350℃,the Y addition leads to obvious age hardening,and the higher Y addition is,the shorter the peakaging time is.However,the electrical conductivity is reduced due to existence of lattice mismatch distortion field,which is attributed to the accelerated precipitation of coherent Al3 Zr particles.Moreover,in the aging treatment of rolled alloys,hardness is still enhanced with Y addition,in spite of annealing softening caused by reduction of dislocation density.In comprehensive consideration,the rolled Al-0.16 Zr-0.10 Yalloy obtains the optimal hardness and electrical conductivity combination after aged at 350℃for 30 h.

关 键 词：Al-Zr合金 Y添加 微观组织 硬度 电导率 

分 类 号：TG146.21[金属学及工艺—金属材料]