Microstructure and Properties of Cu-Ag Alloy after Annealing at Different Temperatures
摘 要
采用连铸法结合冷拉拔与中间软化处理制备Cu-4Ag和Cu-20Ag合金,研究了合金在不同温度(440,480,520℃)退火后的显微组织、硬度和导电率。结果表明:退火后,富银相在Cu-4Ag和Cu-20Ag合金横截面上分别呈细小的颗粒状和连续的网状结构,在合金纵截面上均呈纤维状。与Cu-4Ag合金相比,Cu-20Ag合金的富银相较多,硬度较高,导电率较低;随退火温度升高,2种合金的硬度降低,导电率增大,480℃退火后二者的导电率和硬度均最接近;在480℃退火时Cu-20Ag合金的导电率和硬度达到最优匹配。
Abstract
The Cu-4Ag and Cu-20Ag alloys were prepared by continuous casting combining with cold drawing and intermediate softening treatment. The microstructure, hardness and conductivity of the alloys annealed at different temperatures (440,480,520 ℃) were studied. The results show that after annealing, the rich-silver phase had fine-particle-like shapes fine and continuous network structures on the cross section of the Cu-4Ag and Cu-20Ag alloys, respectively. On the longitudinal section of the alloys, the rich-silver phase was fibrous. The Cu-20Ag alloy had more rich-silver phase, higher hardness and lower conductivity compared with Cu-4Ag alloy. The hardness of the two alloys decreased and the conductivity increased with increasing annealing temperature. The conductivity and hardness of the two alloys were the closest after annealing at 480 ℃. The conductivity and hardness of the Cu-20Ag alloy got the best match when annealed at 480 ℃.
中图分类号 TG146.1 DOI 10.11973/jxgccl202012005
所属栏目 试验研究
基金项目 国家重点研发计划项目(2016YFB0301400);河南省创新引领专项项目(191110210400);河南省高等学校重点科研项目(19A430012);洛阳市科技重大专项项目(1901006A);河南省杰出人才创新基金资助项目(182101510003)
收稿日期 2020/7/25
修改稿日期 2020/10/14
网络出版日期
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备注孔令宝(1995-),男,河南济源人,硕士研究生
引用该论文: KONG Lingbao,ZHOU Yanjun,SONG Kexing,CAO Jun,Lü Changchun,LI Ke,LIU Qingbin,WU Baoan,TANG Huiyi,ZHANG Xuebin,HUANG Tao. Microstructure and Properties of Cu-Ag Alloy after Annealing at Different Temperatures[J]. Materials for mechancial engineering, 2020, 44(12): 29~32
孔令宝,周延军,宋克兴,曹军,吕长春,李科,刘庆宾,吴保安,唐会毅,张学宾,皇涛. 不同温度退火后Cu-Ag合金的组织和性能[J]. 机械工程材料, 2020, 44(12): 29~32
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【7】郭保江,周延军,张彦敏,等. 连铸速度对Cu-3.5Ag合金组织性能的影响[J].特种铸造及有色合金,2019,39(7):808-812.
【8】郭保江,周延军,张彦敏,等. 时效时间对Cu-3.5Ag合金性能及其纳米析出相特征的影响[J]. 材料热处理学报, 2020, 41(6):55-61.
【9】王英民,毛大立. 形变纤维增强高强度高电导率的Cu-Ag合金[J]. 稀有金属材料与工程, 2001, 30(4):295-298.
【10】封存利,秦芳莉,介明山,等. 拉拔工艺对定向凝固Cu-Ag合金导线性能的影响[J]. 特种铸造及有色合金, 2015,35(8):112-115.
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【15】宁远涛,张晓辉,张婕. 大变形Cu-Ag合金原位纤维复合材料的稳定性[J]. 中国有色金属学报, 2005,15(4):18-24.
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