将黄铜中的合金元素利用锌当量替换公式换算成锌当量,然后用Cu-Zn二元状态图来研究各种黄铜的金相组织,是研究黄铜金相时常采用的方法.但是,应用此法来研究ZHtSi63-2及ZHtSi80-3等硅黄铜时,发现实际所得金相组织与Cu-Zn二元状态图中所示组织不相符合.本文通过对ZHtSi63-2硅黄铜的组织研究,证明应用Cu-Zn二元状态图来研究黄铜金相组织有其一定的局限性. The brass alloy elements using the equivalent of zinc equivalent formula converted into zinc equivalent, and then use Cu-Zn binary state diagram to study a variety of brass microstructure, brass metallurgy is often used in the study method However, When this method was used to study the brass such as ZHtSi63-2 and ZHtSi80-3, it was found that the actual microstructure was not consistent with the structure shown in the binary state diagram of Cu-Zn. Tissue research shows that the application of Cu-Zn binary state diagram to study the brass microstructure has its own limitations.