热处理对AuCuPtPdNiRh合金显微组织的影响(英文)

Effects of Heat Treatment on the Microstructures of AuCuPtPdNiRh Alloys

运用金相组织分析、差热分析(DSC)、X射线衍射(XRD)、扫描电镜(SEM)和能谱(EDS)对铸态、固溶态(750℃、1 h,850℃、4 h,950℃、1 h)和热处理950℃、4 h后的金基合金的显微组织进行了研究。该金基合金由Au(Cu,Pd)固溶体和Pt(Rh,Ni)固溶体以及它们的混合物构成。随着热处理温度的提高,Pd溶质由混合物中偏析出来。在700℃、850℃和950℃进行热处理时,形成了L12结构的Au Cu3相。

The microstructures of Au-based alloy were investigated for the as-casted state, solution heat treated at 750℃ for 1 h, 850℃ for 4 h, and 950℃ for 1 h, and uniform heat treated at 950℃for 4 h by metallurgical structure examination, differential thermal analysis（DSC）, X-ray diffraction（XRD）, scanning electron micrograph（SEM） and energy spectrum analysis（EDS）. This Au-based alloy is composed of Au（Cu, Pd）, Pt（Rh, Ni）, and the mixture of both. With the heat treated temperature elevated, Pd solute segregated from the mixtures. Au Cu3 phase with L12 structure formed as heat treated at 700℃, 850℃, and 950℃.