谷继华,张学宾,周延军,宋克兴,李韶林,曹军,张朝民,张朋飞,李鑫,吴捍疆

• 1:河南科技大学材料科学与工程学院
• 2:河南省科学院
• 3:河南理工大学机械与动力工程学院

摘要(Abstract)：

采用三室真空冷型竖引连铸设备制备了线径为7.821 mm的铸态Cu-4 mass%Ag合金杆，并利用多道次连续拉拔工艺制备了变形量分别为53.38%、93.14%和98.37%的线材；分别对铸态和拉拔态的Cu-4 mass%Ag合金线材进行力学性能、电学性能测试以及微观组织分析。结果表明：铸态Cu-4 mass%Ag合金杆的抗拉强度为236 MPa、导电率为88.50%IACS,当拉拔变形量达到98.37%时，抗拉强度升高到674 MPa,提升了185.59%,而导电率下降到81.00%IACS,仅下降了8.47%;铸态Cu-4 mass%Ag合金杆的横截面组织为典型的“纺布”状枝晶、纵截面为“鱼骨”状枝晶，随着拉拔变形量的增加，线材在纵截面上整体结构呈现出纤维状组织，边缘部分的变形程度要比心部剧烈；当拉拔变形量达到98.37%时，产生了形变孪晶。加工硬化和细晶强化是Cu-4 mass%Ag合金线材拉拔过程中的主要强化机制。

关键词(KeyWords)： Cu-4 mass%Ag合金;连续拉拔;力学性能;电学性能;微观组织

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(U21A2051);; 中原学者工作站资助项目(214400510028);; 河南省重点研发与推广专项(212102210441);; 中国工程科技发展战略河南研究院战略咨询研究项目(2021HENZDA02)

作者(Author): 谷继华,张学宾,周延军,宋克兴,李韶林,曹军,张朝民,张朋飞,李鑫,吴捍疆

DOI: 10.13289/j.issn.1009-6264.2022-0602

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