Transactions of Materials and Heat Treatment

Title：Continuous extrusion manufacturing process with short process for Cu-Ni-Si alloy

Authors： Li Mingliang1 Lin Zhaoqin1 Chen Zhongyu1 Zhu Jing1 Liu Ping2 Liu Xinkuan2

Unit： (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)

KeyWords： Cu-Ni-Si alloy continuous extrusion cold rolling aging conductivity

ClassificationCode：TG335.5

year,vol(issue):pagenumber：2023,48(6):91-95

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 continuous extrusion and cold rolling was determined to be 400 ℃ for 30 min. Then, the copper strip after aging treatment at 400 ℃×30 min and rolling at 70% reduction rate was also studied. The results show that the hardness of copper strip is 252 HV, the conductivity is 23.20 MS·m-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.

Funds：

江苏省苏北科技专项（SZ-YC2019064）; 校级跨界团队基金(ygykj202103)

李明亮（1976-），男，硕士，副教授

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