形变热处理工艺对Cu-Cr-Zr-Si合金软化温度及再结晶行为的影响  

Effect of thermo-mechanical heat treatment on the softening temperature and recrystallization behavior of Cu-Cr-Zr-Si alloy

作　　者：徐晓岑 李家智 丁桦 高维林 XU Xiaocen;LI Jiazhi;DING Hua;GAO Weilin(School of Materials Science and Engineering,Northeastern University,Shenyang110819,China;Key Laboratory of Lightweight Structural Materials,Liaoning Province,Shenyang 110819,China;JCC High Precision Copper Strip Company Limited,Jiangxi Province,Nanchang330096,China)

机构地区：[1]东北大学材料科学与工程学院,沈阳110819 [2]辽宁省轻量化用关键金属结构材料重点实验室,沈阳110819 [3]江西江铜高精铜板带有限公司,南昌330096

出　　处：《中国体视学与图像分析》2024年第3期202-210,共9页Chinese Journal of Stereology and Image Analysis

摘　　要：采用光学显微镜、透射电镜、电子背散射衍射(EBSD)和维氏硬度计等研究了不同形变热处理工艺对Cu-0.31Cr-0.19Zr-0.03Si(mass%)合金软化温度及其再结晶行为的影响。结果表明,引入预时效工艺和增大冷轧压下量,合金的软化温度提高,这与预时效后内部析出的第二相粒子经冷变形后,在后续退火过程中与位错发生了强烈的交互作用,阻碍了合金的回复和再结晶行为有关。对峰时效态的试样进行了不同温度的退火处理发现:在400~640℃温度区间,峰时效态Cu-Cr-Zr-Si合金的退火软化主要是由回复和第二相粒子粗化引起;在640~720℃温度区间,合金的软化是由于第二相粗化、回复及再结晶的综合作用,其中再结晶软化占主导因素。The effects and mechanism of different thermo-mechanical treatment on the high temperature resistance softening performance of Cu-0.31Cr-0.19Zr-0.03Si(mass%)alloy were studied by optical microscopy,transmission electron microscopy,EBSD and Vickers hardness tester.The results indicate that the introduction of pre-aging process and the increase of the amount of cold rolling pressure increase the softening temperature of the alloy.This is related to the strong interaction between the second-phase particles internally precipitated after pre-aging and dislocation in the subsequent annealing process,which hinders the recovery and recrystallization behavior of the alloy.The experiment conducted on the peak aged samples reveals that the annealing softening of the peak aged Cu-Cr-Zr-Si alloy is mainly caused by the coarsening of the second phase particles in the temperature range of 400~640℃.In the temperatures range of 640~720℃,the softening of the alloy is attributed to the combined effects of second phase coarsening,recovery,and recrystallization,where recrystallization softening is the dominant factor.

关 键 词：Cu-Cr-Zr-Si合金 形变热处理 软化机理 再结晶行为 

分 类 号：TG156.93[金属学及工艺—热处理] TG146.11[金属学及工艺—金属学]