Cu-Ni-Si合金连续挤压短流程制造工艺_李明亮.pdf

第 48 卷 第 6 期Vol.48 No.6FORGING&STAMPING TECHNOLOGY 2023 年 6 月Jun.2023挤压与拉拔Cu-Ni-Si 合金连续挤压短流程制造工艺李明亮1,林兆擎1,陈中玉1,朱 璟1,刘 平2,刘新宽2(1.盐城工业职业技术学院 汽车与交通学院,江苏 盐城 224001;2.上海理工大学 材料与化学学院,上海 200093)摘要:Cu-Ni-Si 合金引线框架带材的传统生产工艺流程长、成本高、材料利用率低,且产品易产生缺陷,利用连续挤压短流程制造工艺代替传统生产工艺,探究了时效温度和时效时间对 Cu-Ni-Si 合金连续挤压与冷轧后的导电率、硬度、抗拉强度和伸长率的影响,确定了 Cu-Ni-Si 合金连续挤压与冷轧后铜带的最佳时效处理工艺为 400 30 min,并对采用该时效处理和经70%压下率轧制后的铜带进行了研究。结果表明:铜带的硬度为 252 HV、导电率为 23.20 MSm-1、抗拉强度为 810 MPa、伸长率为 5.3%,均达到了引线框架带材所要求的技术指标,验证了该时效处理工艺的合理性和连续挤压短流程工艺制造 Cu-Ni-Si 合金引线框带材的可行性。关键词:Cu-Ni-Si 合金;连续挤压;冷轧;时效;导电率DOI:10.13330/j.issn.1000-3940.2023.06.013中图分类号:TG335.5 文献标志码:A 文章编号:1000-3940(2023)06-0091-05Continuous extrusion manufacturing process with short process for Cu-Ni-Si alloyLi Mingliang1,Lin Zhaoqin1,Chen Zhongyu1,Zhu Jing1,Liu Ping2,Liu Xinkuan2(1.College of Automobile and Transportation,Yancheng Industrial Vocational and Technical College,Yancheng 224001,China;2.School of Materials and Chemistry,University of Shanghai for Science and Technology,Shanghai 200093,China)Abstract:The traditional production process of Cu-Ni-Si alloy lead fram strip has long process,high cost and low material utilization rate,and the product is easy to have defects.The continuous extrusion manufacturing process with short process was used instead of the traditional production process.The influences of aging temperature and aging time on the conductivity,hardness,tensile strength and elongation of Cu-Ni-Si alloy after continuous extrusion and cold rolling were investigated,and the optimum aging process of Cu-Ni-Si alloy strip after continu-ous extrusion and cold rolling was determined to be 400 for 30 min.Then,the copper strip after aging treatment at 400 30 min and roll-ing at 70%reduction rate was also studied.The results show that the hardness of copper strip is 252 HV,the conductivity is 23.20 MSm-1,the tensile strength is 810 MPa and the elongation is 5.3%,which meet the requirements of lead frame strip.The suitability of the aging process and the feasibility of the Cu-Ni-Si alloy lead frame strip manufactured by continuous extrusion process with short process are verified.Key words:Cu-Ni-Si alloy;continuous extrusion;cold rolling;aging;conductivity收稿日期:2022-12-15;修订日期:2023-03-10基金项目:江苏省苏北科技专项(SZ-YC2019064);校级跨界团队基金(ygykj202103)作者简介:李明亮(1976-),男,硕士,副教授E-mail:sx31976 集成电路中引线框架所使用的铜合金材料要具备较高的硬度和强度,良好的导热导电性、耐热性、耐氧化性、耐腐蚀性等性能。在众多铜基引线框架材料中,Cu-Ni-Si 系合金因具有高强度、高导电率、良好的焊接性能和低廉的价格等优点,获得了广泛的研究1。其中,Cu-Ni-Si 系 C70250 合金因具有高强度、高导热性能和优良的综合性能而备受关注,其非常适用于引线框架合金,已经成为铜基引线框架材料的重要发展方向1-2。铜及铜合金引线框带材制造的传统生产工艺(铸锭轧制法、铸坯轧制法)的流程长、成本高,且工艺存在缺陷,因此出现了短流程连续挤压的生产方法,并已经得到规模化应用,逐渐替代了传统的生产工艺3。本文采用上引铸造铜合金杆料连续挤压少道次轧制(70%压下率)时效处理(罩式炉退火)冷轧精整(70%压下率)的制造工艺,研究了 C70250 合金采用连续挤压短流程制造工艺的可行性。Cu-Ni-Si 合金引线框带材的关键性能指标为4:抗拉强度800 MPa,14.5 MSm-1导电率800 MPa、14.50 MSm-1导电率800 MPa、14.50 MSm-1导电率34.22 MSm-1的技术指标,说明采用 400 30 min 时效处理工艺是合适的,采用连续挤压短流程工艺制造引线框铜带的方法是可行的。参考文献:1 侯绿林,尹振兴,甘春雷,等.引线框架用 Cu-Ni-Si 合金及其制备加工工艺的研究进展 J.材料研究与应用,2020,14(1):59-65.Hou L L,Yin Z X,Gan C L,et al.Research progress of Cu-Ni-Si alloy for lead frame and its preparation and processing technologyJ.Materials Research and Application,2020,14(1):59-65.2 张英,陆萌萌,胡艳艳,等.引线框架用 Cu-Ni-Si 合金的发展及研究现状 J.上海有色金属,2014,35(4):177-182.Zhang Y,Lu M M,Hu Y Y,et al.Development and study of Cu-Ni-Si alloy for lead frame J.Shanghai Nonferrous Metals,2014,35(4):177-182.3 孙海洋,闫志勇,樊志新.KFC 铜合金引线框架带材的连续挤压制造技术 J.现代制造工程,2011,375(12):83-87.Sun H Y,Yan Z Y,Fan Z X.Continual extrusion manufacturing technology of KFC copper alloy lead frame strip J.Modern Manufacture Engineering,2011,375(12):,12:83-87.4 刘平,赵冬梅,田保红.高性能铜合金及其加工技术 M.北京:冶金工业出版社,2005.Liu P,Zhao D M,Tian B H.High Performance Copper Alloy and Its Processing Technology M.Beijing:Metallurgical In-dustry Press,2005.5 张涛.稀土添加和时效处理对 Cu-Ni-Si 合金组织与性能的影响 D.济南:山东大学,2017.Zhang T.Effects of Rare Earth and Aging Treatment on Microstruc-ture and Properties of Cu-Ni-Si Alloys D.Jinan:Shandong University,2017.6 李明亮,刘平,刘新宽,等.时效处理对冷轧 C194 铜合金性能的影响 J.特种铸造及有色合金,2017,37(4):457-460.Li M L,Liu P,Liu X K,et al.Effects of aging treatment on prop-erties of the cold rolling C194 copper alloy J.Special Casting&Nonferrous Alloys,2017,37(4):457-460.7 马行驰,黄金亮,贾淑果,等.时效对列车接触网导线用 Cu-Ag-Zr 合金性能的影响 J.热加工工艺,2004,(8):35-37.Ma X C,Huang J L,Jia S G,et al.Effect of aging on property of Cu-Ag-Zr alloy for contact wire line used in catenary of rail wayJ.Hot Working Technology,2004,(8):35-37.8 胡赓祥,蔡珣,戎咏华.材料科学基础 M.第3 版.上海:上海交通大学出版社,2010.Hu G X,Cai X,Rong Y H.Fundamentals of Materials ScienceM.3nd Eidition.Shanghai:Shanghai Jiao Tong University Press,2010.9 孙健,刘平,刘新宽,等.Cu-Ni-Si 合金连续挤压过程中的组织演变及性能 J.中国有色金属学报,2014,24(4):943-948.Sun J,Liu P,Liu X K,et al.Microstructure evolution and properties of Cu-Ni-Si alloy during continuous extrusion processJ.The Chinese Journal of Nonferrous Metals,2014,24(4):943-948.10张毅.微合金化高性能 Cu-Ni-Si 系引线框架材料的研究D.西安:西安理工大学,2009.Zhang Y.Research on Microalloyed Cu-Ni-Si Alloy with High Per-formance for Lead Frame D.Xian:Xian University of Tech-nology,2009.11张凌峰,刘平,康布熙,等.时效