铜业工程Issue(3)：64-71,8.DOI:10.3969/j.issn.1009-3842.2025.03.008
真空压铸Cu-Ni-Si-Cr合金微观组织及性能研究
Microstructure and Properties of Cu-Ni-S-Cr Alloy via Vacuum-Assisted Die Casting
摘要
Abstract
In this study,Cu-3.18Ni-0.75Si-0.28Cr(mass fraction)alloy was prepared using vacuum-assisted die casting(VADC)pro-cess,and the microstructure and properties of alloy before and after direct aging treatment were investigated.The results showed that synergistic effects of vacuum,pressure,and high cooling rates during VADC process allowed excellent compositional uniformity within the alloy,forming fine grains and a high-energy metastable supersaturated solid solution.Direct aging treatment(450℃×6 h)induced the precipitation of a large amount of dispersed nanoscale δ-Ni2Si phases,significantly enhancing the mechanical properties of VADC al-loy.After aging treatment,VADC alloy exhibited a tensile strength of(657±16)MPa,hardness of HV(241.5±9.3),elongation of(21.8±3.6)%,and electrical conductivity of(31.6±0.7)%IACS.This method enabled efficient preparation and near-net shape forming of high-performance Cu-Ni-Si-Cr alloys,offering considerable industrial application potentials.关键词
铜合金/真空压铸/直接时效处理/微观组织/力学性能Key words
copper alloy/vacuum die casting/direct aging treatment/microstructure/mechanical property分类
冶金工业引用本文复制引用
郑敬明,孙婉婷,李佳,付莹..真空压铸Cu-Ni-Si-Cr合金微观组织及性能研究[J].铜业工程,2025,(3):64-71,8.基金项目
松山湖科技特派员项目(20234441-01KCJ-G)资助 （20234441-01KCJ-G）
