轧制时效工艺对Cu-0.6Cr-0.1Zr合金性能的影响机理  

Influence of Mechanism of Rolling and Aging on Properties of Cu-0.6Cr-0.1Zr Alloy

作　　者：刘亨 曲建平 李国梁 接金川[1,2] 李廷举 Liu Heng;Qu Jianping;Li Guoliang;Jie Jinchuan;Li Tingju(School of Materials Science and Engineering,Dalian University of Technology,Dalian 116081;Liaoning Key Laboratory of Solidification Control and Digital Preparation Technology,Dalian 116081)

机构地区：[1]大连理工大学材料科学与工程学院,大连116081 [2]辽宁省凝固控制与数字化制备技术重点实验室,大连116081

出　　处：《特种铸造及有色合金》2024年第2期182-188,共7页Special Casting & Nonferrous Alloys

基　　金：国家重点研发计划资助项目(2018YFE0306103)。

摘　　要：基于ITER偏滤器服役工况制备了Cu-0.6Cr-0.1Zr合金,探究了不同轧制时效工艺对该合金力学性能和电导率的影响机理。结果表明,950℃固溶2 h+室温轧制50%+450℃时效15 min+室温轧制80%+450℃时效2 h工艺条件下合金综合性能最佳,其屈服强度为624.5 MPa、伸长率为12.1%、电导率为45.762 MS/m。采用TEM和EBSD表征了合金的主要强化相和显微组织,发现晶界强化、位错强化和析出强化是Cu-0.6Cr-0.1Zr合金强度高的重要原因。Cu-0.6Cr-0.1Zr alloy was fabricated based on the service conditions of ITER divertor,and effects of different rolling and aging processes on mechanical properties and electrical conductivity of the alloy were investigated.The results indicate that the optimal performance of the alloy is achieved under the condition of solution treatment of 950℃ for 2 h+50% cold rolling at room temperature+aging at 450℃ for 15 min+80% cold rolling at room temperature+aging at 450℃ for 2 h,where the yield strength,elongation and electrical conductivity reach 624.5 MPa,12.1% and 45.762 MS/m.The main strengthening phases and microstructure of the alloy were characterized by TEM and EBSD.The results reveal that grain boundary strengthening,dislocation strengthening,and precipitation strengthening make a great contribution to the high strength of Cu-0.6Cr-0.1Zr alloy.

关 键 词：CU-CR-ZR合金 轧制 时效 沉淀物 位错密度 

分 类 号：TG146.11[一般工业技术—材料科学与工程]