王智超,李韶林,宋克兴,张朝民,周延军,柳亚辉,孙俊杰,曹军

• 1:河南科技大学河南省有色金属材料科学与加工技术重点实验室
• 2:有色金属新材料与先进加工技术省部共建协同创新中心
• 3:河南省科学院
• 4:西安交通大学材料科学与工程学院

摘要(Abstract)：

采用冷型上引连铸技术、热型水平连铸技术和连铸连轧技术(SCR法)分别制备了纯铜杆坯,研究了不同工艺对纯铜杆组织性能的影响。结果表明:固液界面的形貌决定了热流方向,而热流方向决定了晶粒的生长方向,晶粒生长造成的组织差异决定了杆坯性能;冷型上引连铸制备的多晶铜固液界面呈现深“V”型,其纵截面组织为平行于轴向的柱状晶;连铸连轧制备的多晶铜经过轧制阶段,其组织为破碎的等轴晶;热型水平连铸制备的单晶铜固液界面为“C”型,其组织为单一的轴向柱状晶;冷型上引连铸多晶铜和热型水平连铸单晶铜具有较好的塑性和导电率,两者伸长率分别为58%和60.67%,导电率分别为100.9%IACS和102.6%IACS;连铸连轧多晶铜和冷型上引连铸多晶铜具有较好的强度,两者抗拉强度分别为307和221 MPa。界面对位错的阻碍和对自由电子的散射是影响纯铜杆坯力学性能和导电性能的主要因素。

关键词(KeyWords)： 冷型上引连铸;热型水平连铸;连铸连轧;固液界面;传热方向

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(U21A2051,52173297,52071133);; 河南省科技研发计划联合基金(222103810037)

作者(Author): 王智超,李韶林,宋克兴,张朝民,周延军,柳亚辉,孙俊杰,曹军

DOI: 10.13289/j.issn.1009-6264.2024-0353

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