Microstructure and properties of Cu-Ni-Si-Zr alloy after thermomechanical treatments  

作　　者：Xiang-Peng Xiao Bai-Qing Xiong Qiang-Song Wang Guo-Liang Xie Li-Jun Peng Guo-Xing Huang 

机构地区：[1]State Key Laboratory for Fabrication and Processing of Non-ferrous Metals,General Research Institute for Nonferrous Metals [2]Aluminum Corporation of China Limited Luoyang Copper Co.,Ltd.

出　　处：《Rare Metals》2013年第2期144-149,共6页稀有金属（英文版）

基　　金：supported by the Project of National "863"Foundation of China(No.2006AA03Z522);Science and Technology of Beijing(No.10231103)

摘　　要：The effect of thermomechanical treatments on the microstructures and properties of Cu-2.1Ni-0.5Si- 0.2Zr alloy was investigated. The hot-rolled plates were solution treated at 920 ℃ for 1.5 h, quenched into water, cold rolled by 70 % reduction in thickness, and then aged at 400, 450 and 500 ℃for various times. The variation in tensile strength and electrical conductivity of the alloy was measured as a function of the aging time. The results show the peak strength value of 665 MPa for the alloy aged at 450 ℃ for 2 h. However, the electrical conductivity is observed to reach a maximum of 47 % IACS aged at 450℃for 8 h. OM, SEM, and TEM were used for microstructural inspection of the alloy. Precipitation occurs preferentially at deformation bands in the cold-rolled alloy. Properties behavior is discussed in the light of microstructural features.The effect of thermomechanical treatments on the microstructures and properties of Cu-2.1Ni-0.5Si- 0.2Zr alloy was investigated. The hot-rolled plates were solution treated at 920 ℃ for 1.5 h, quenched into water, cold rolled by 70 % reduction in thickness, and then aged at 400, 450 and 500 ℃for various times. The variation in tensile strength and electrical conductivity of the alloy was measured as a function of the aging time. The results show the peak strength value of 665 MPa for the alloy aged at 450 ℃ for 2 h. However, the electrical conductivity is observed to reach a maximum of 47 % IACS aged at 450℃for 8 h. OM, SEM, and TEM were used for microstructural inspection of the alloy. Precipitation occurs preferentially at deformation bands in the cold-rolled alloy. Properties behavior is discussed in the light of microstructural features.

关 键 词：Cu-Ni-Si-Zr alloy Precipitation ELECTRICALCONDUCTIVITY Tensile strength Microstructural features 

分 类 号：TG166[金属学及工艺—热处理]