摘要
为开发一种用于铝合金钎焊的低熔点钎料,研究了5种Al-11.5Si-3.5Cu-1.6Mg-x Ni合金。通过差示扫描量热法(DSC)测定了这5种合金的熔化温度。借助金相显微镜、X射线衍射仪(XRD)及配备能谱分析(EDS)的扫描电子显微镜(SEM),对合金的显微组织和物相进行了系统分析。结果表明,在Al-11.5Si-3.5Cu-1.6Mg合金钎料中添加Ni的质量分数为0.5%~2.0%时,可使其均匀化退火状态主熔化峰温度降低约2.7~3.7℃,同时固相线温度从506.8℃升高至533.3℃。这意味着在钎料中添加Ni能有效缩小固相线与主熔化峰之间的距离,进而提高钎料的钎焊性能。Ni的加入会形成三种含镍相:ε-Al 3 Ni相、δ-Al 3 CuNi相和γ-Al 7 Cu 4 Ni相。
For the development of a low-melting-point filler metal for brazing aluminum alloys,a series of Al-11.5Si-3.5Cu-1.6Mg-x Ni alloys have been studied.The melting temperatures of such Al-Si-Mg-Cu-Ni filler metals were determined by the differential scanning calorimetry(DSC)analysis.Through metallography,X-ray diffraction and scanning electron microscopy(SEM)with energy dispersive spectroscopy(EDS),the microstructure and phases of these alloys were analysis.The results show that the addition of 0.5-2.0wt.%nickel into the Al-11.5 Si-3.5Cu-1.6Mg filler metal causes its main melting peak(T L)to decrease by about 2.7-3.7℃.At the same time,the solidus temperature(T S)can increase from 506.8℃to 533.3℃.This means that adding nickel to filler metals can effectively reduce the distance between the solidus and the main melting peak,thereby improving the brazing performance of filler metals.The study of microstructure indicates that the addition of nickel will introduce three nickel-containing phases,namelyε-Al 3 Ni,δ-Al 3 CuNi andγ-Al 7 Cu 4 Ni phases.
作者
高勇进
邓荣琴
GAO Yongjin;DENG Rongqin(Shanghai Huafon Aluminium Corporation,Shanghai 201500,China;Shanghai Huafon New Materials R&D Technology Co.,Ltd.,Shanghai 201315,China)
出处
《轻合金加工技术》
2025年第4期14-20,32,共8页
Light Alloy Fabrication Technology
