摘要
采用中频感应熔炼炉制备了Cu-0.7Cr-0.15Zr和Cu-0.7Cr-0.15Zr-0.05Mg-0.02Si两种合金,研究了Mg、Si复合微合金化对Cu-Cr-Zr合金时效工艺参数、性能与析出动力学的影响。结果表明:Mg、Si复合微合金化提高了Cu-Cr-Zr合金的最佳时效温度,延长了保温时间,Cu-0.7Cr-0.15Zr合金的最佳时效工艺为410℃时效8 h,Cu-0.7Cr-0.15Zr-0.05Mg-0.02Si合金的最佳时效工艺为430℃时效14 h。Mg、Si复合微合金化提高了Cu-Cr-Zr合金的抗拉强度与导电率,Cu-0.7Cr-0.15Zr合金最佳工艺条件下的强度为570 MPa、电导率为79.1%IACS;Cu-0.7Cr-0.15Zr-0.05Mg-0.02Si合金最佳时效工艺条件下的抗拉强度为595 MPa、电导率为80.4%IACS。Mg、Si复合微合金化改变了Cu-Cr-Zr合金Avrami相变动力学方程,减缓了时效析出过程。
Two kinds of alloy Cu-0. 7Cr-0. 15Zr and Cu-0. 7Cr-0. 15Zr-0. 05Mg-0. 02Si were prepared by the medium frequency induction melting furnace. The influence of Mg,Si composite microalloying on Cu-Cr-Zr alloys aging process parameters,properties and precipitation kinetics were studied. The results show that the Mg and Si composite microalloying can increase the best aging temperature of Cu-Cr-Zr alloy,and prolong the aging time. The optimum aging process of Cu-0. 7Cr-0. 15Zr alloy is 410 ℃ for 8 h,and the optimum aging process of Cu-0. 7Cr-0. 15Zr-0. 05Mg-0. 02Si alloy is 430 ℃ for 14 h. Mg and Si composite microalloying can improve tensile strength and electric conductivity of the Cu-Cr-Zr alloy. Under the optimum aging process,the strength of Cu-0. 7Cr-0. 15Zr alloy is 570 MPa and the conductivity is 79. 1% IACS,and the tensile strength of Cu-0. 7Cr-0. 15Zr-0. 05Mg-0. 02Si alloy is 595 MPa and the conductivity is 80. 4% IACS. Mg and Si composite microalloying can change the Avrami phase transformation kinetics equation of Cu-Cr-Zr alloy and slow down the aging precipitation process.
作者
侯东健
武磊
高大伟
张琦
孙宁
孔见
Hou Dongjian Wu Lei Gao Dawei Zhang Qiz Sun Ning Kong Jian(School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing Jiangsu 210094, China Henan River Machinery Co., Ltd., Pingdingshan Henan 467337, China New Technology Popularization and Research Institute of China Ordnance Industry, Beijing 10008)
出处
《金属热处理》
CAS
CSCD
北大核心
2016年第10期102-107,共6页
Heat Treatment of Metals
作者简介
侯东健（1989-），男，硕士研究生，主要研究方向为高强高导铜合金，E-mail：houdongjian2016@126．com。
通讯作者：孔见，博士，E-mail：kongjian68@126．com
