Effect of Heat treatment on microstructure and properties of Cu-Ni-Co-Si alloy

[摘要] In the paper, the effect of different solution and aging treatment on microstructure and properties of Cu-Ni-Co-Si alloy is investigated in detail. The results show that the recrystallization, grain growth and second phase solubilization are observed during the continuous solution treatment on line of Cu-Ni-Co-Si alloy. When the Cu-Ni-Co-Si alloy is solutioned at 970 °C and speed of annealing is 10 m/min, aged at 500 °C for 8 h, 40 % cold roll and aged at 325 C for 12 h, it has the excellent comprehensive properties, which can meet the needs of high-end lead frame and connectors. The Disk-shaped precipitates have been confirmed as (Ni, Co)2Si phase. The crystal orientation relationship between matrix and precipitates is (221)P||(200)Cu[102]P||[001]Cu.

[发布机构] NingBo XingYe Sheng Tai Group Co. Ltd, Provincial Enterprise Technology Center, NingBo, Zhejiang; 315336, China^1;State Key Laboratory of Nonferrous Metals and Process, General Research Institute for Nonferrous Metals Engineering Institute, Beijing; 101400, China^2

[效力级别] 材料工程

[关键词] Aging treatment;Co-Si alloy;Comprehensive properties;Effect of heat treatments;Microstructure and properties;Orientation relationship;Second phase;Solution treatments