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以Cu-Ni-Al三元相图富铜端两组合金为研究对象,采用高频感应熔炼获得Cu-Ni-Al合金铸锭,并对铸锭进行固溶+时效处理。通过对固溶+时效处理前后的显微组织、形貌和相组成的对比分析,可以认为,Cu-Ni-Al合金的富铜端并非为单相固溶区,通过适当热处理,Ni3Al相从富Cu固溶体相内析出是可能的;固溶+时效处理有助于铸态Cu-Ni-Al三元合金中的晶界相网状Ni Al相的瓦解和晶内细小颗粒Ni3Al相的析出。
Cu-Ni-Al ternary phase diagram copper-rich two ends of the alloy as the research object, the use of high-frequency induction melting of Cu-Ni-Al alloy ingot casting and ingot solution + aging. By comparing the microstructure, morphology and phase composition before and after solution treatment, it can be concluded that the Cu-Ni-Al alloy is not single-phase solid solution zone at the copper-rich end. With proper heat treatment, Ni3Al phase Cu-Ni solid solution phase precipitation is possible; solid solution + aging treatment is conducive to the collapse of the grain boundary phase NiAl phase in the as-cast Cu-Ni-Al ternary alloy and the precipitation of fine Ni3Al particles in the grain.