冷轧变形对高性能Cu-Ni-Si合金组织性能与析出行为的影响  

Effect of Cold-Rolling Deformation on Microstructure,Properties,and Precipitation Behavior of High-Performance Cu-Ni-Si Alloys

作　　者：王长胜 付华栋[1,2,3] 张洪涛[1,2] 谢建新[1,2,3] WANG Changsheng;FU Huadong;ZHANG Hongtao;XIE Jianxin(Beijing Advanced Innovation Center for Materials Genome Engineering,University of Science and Technology Beijing,Beijing 100083,China;Beijing Laboratory of Metallic Materials and Processing for Modern Transportation,University of Science and Technology Beijing,Beijing 100083,China;Key Laboratory for Advanced Materials Processing(MOE),University of Science and Technology Beijing,Beijing 100083,China)

机构地区：[1]北京科技大学、北京材料基因工程高精尖创新中心,北京100083 [2]北京科技大学现代交通金属材料与加工技术北京实验室,北京100083 [3]北京科技大学材料先进制备技术教育部重点实验室,北京100083

出　　处：《金属学报》2023年第5期585-598,共14页Acta Metallurgica Sinica

基　　金：国家重点研发计划项目No.2020YFB0311101;国家自然科学基金项目Nos.51974028和92066205;北京市科技新星计划项目No.Z191100001119125;小米青年学者项目。

摘　　要：采用DSC、TEM、导电率和力学性能等测试方法,研究了不同冷轧变形量对Cu-3.0Ni-0.60Si-0.16Zn-0.15Cr-0.03P(质量分数,%)合金组织性能与析出行为的影响,旨在通过工艺调控提升该合金的综合性能。通过对比不同冷轧变形后合金的开始析出温度和再结晶温度以及时效后合金的组织性能,确定了高性能Cu-NiSi系合金的形变-时效工艺参数,明确了冷轧变形量对合金时效析出动力学的影响规律和强化相析出的调控机制;合金经过95%冷轧+450℃、60 min形变热处理后获得了显著优于现有Cu-Ni-Si合金(如C70250)的性能,其抗拉强度为(841±10)MPa,导电率为(52.2±0.3)%IACS。The advancement of integrated circuit manufacturing process and chip packaging technology has improved the performance requirements for lead frame copper alloy.In the field of high-performance copper alloys,balancing and improving mechanical and electrical conductivity(EC)has been a challenge.This work investigates the effect of different cold-rolling deformations(0,65%,75%,85%,and 95%)on the microstructure,properties,and precipitation behavior of Cu-3.0Ni-0.60Si-0.16Zn-0.15Cr-0.03P alloy to enhance its comprehensive performance through process control.The deformation-aging process parameters of high-performance Cu-Ni-Si alloys were determined by comparing the precipitation and recrystallization initial temperatures,microstructures,and properties of the samples after aging.The effect of cold-rolling deformation on precipitation kinetics and mechanism was studied.By optimizing the process parameters,the properties of the alloy are observed to be better than the existing Cu-Ni-Si alloys after 95%cold-rolling deformation and aging at 450oC for 60 min,with an ultimate tensile strength of(841±10)MPa,and an EC of(52.2±0.3)%IACS.This work's relevant research findings can provide theoretical reference and data support for realizing the comprehensive property enhancement of high-performance copper alloys.

关 键 词：冷轧变形 时效析出 微观组织 析出动力学 

分 类 号：TG146.1[一般工业技术—材料科学与工程]