形变时效对Cu-1.3Ni-0.3Si合金力学性能及导电率的影响方法创新.docVIP

形变时效对Cu-1.3Ni-0.3Si合金力学性能及导电率的影响 潘少彬1，王智祥1，叶艳君1，廖跃辉1，刘峰2 江西理工大学 材料科学与工程学院，江西赣州 341000；2.宁波兴业盛泰集团有限公司宁波 315336） 摘要采用OM、SEM和EDS等分别研究了400~550 ℃、1~8 h时效工艺对冷轧变形程度为0~70%的Cu-1.3Ni-0.3Si合金显微组织及性能的影响。结果表明经不同冷变形量的合金在450 ℃时效1 h后，硬度均到达峰值，当温度升高到500 ℃，合金导电率达到最大值，此时基体组织中分布有大量细小弥散的第二相颗粒；合金的导电率随保温时间的延长不断增大，且变形程度越大，导电率提升越明显。预冷变形量为70%的合金在450 ℃×3 h时效后，其硬度达到180HB，导电率可达52%IACS，相比未经变形合金时效后最高硬度提高了约21%，导电率提高了约11%。关键Cu-Ni-Si合金时效预变形程度性能TB31 文献标志码：A 文章编号：1007-7545（2017）08-0000-00 Effect of Deformation Aging on Mechanical Properties and Electrical Conductivity of Cu-1.3Ni-0.3Si Alloy PAN Shao-bin1, WANG Zhi-xiang1, YE Yan-jun1, LIAO Yue-hui1, LIU Feng2 (1. School of Materials Science and Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi, China;2. Ningbo Xingye Shengtai Group Co. Ltd., Ningbo 315336, Zhejiang, China） Abstractffect of aging process with 400~550 ℃ for 1~8 h on microstructure and properties of Cu-1.3Ni-0.3Si alloy with 0~70% cold deformation was investigated by OM, SEM and EDS. The results show that hardness of alloy with different cold deformation reaches the peak value after aging at 450 ℃ for 1 h. Upon temperature rising to 500 ℃, the electrical conductivity of alloy reaches the maximum value, with a large number of fine dispersed second phase particles in the matrix structure. Conductivity of alloy rises constantly with extension of holding time. The greater degree of deformation is, the more obvious alloy conductivity rises. Hardness of alloy with 70% pre-cooling deformation after aging at 450 ℃ for 3 h is 180HB and conductivity is 52%IACS. Compared to untreated alloy, the maximum hardness of alloy after aging rises by about 21%, and electrical conductivity rises by about 11%. Key words：Cu-Ni-Si alloy; aging; pre-deformation degree; microstructure; properties; electrical conductivity Cu-Ni-Si系合金是一种时效强化型合金，该合金因具有较高的强度和良好的导电性、成型性以及耐应力松弛性能而广泛应用于引线框架以及电子工业领域[12]。目前，Cu-Ni-Si系合金的开发应用主要集中在合金化及固溶时效热处理工艺优化等方面[34]。然而，影响时效过程中第二相的析出不仅仅与时效工艺条件直接相关，同样时效前的预