中国古代青铜器锈蚀层中经常有纯铜晶粒存存。一些学者认为古代铸造青铜器皿时,由于炉温不高,所添加的铜料未能完全熔化,致使残余纯铜晶粒存在;另一些学者认为纯铜晶粒来源于未被完全熔化的“垫片”;还有一些学者则认为青铜组织中的富锡相被氧和氢氧根侵蚀后,由于反合金作用,沉淀出了纯铜晶粒。尽管纯铜晶粒的形成机理至今尚无定论,然而由于这一问题与铸造工艺有着密切的联系,因此一直受到冶金史界的关注。我们研究古代铜镜的结构成分和铸造工艺数年,曾发现一些铜镜和其它青铜器皿一样,其 Ancient Chinese bronze rust often have pure copper grains stored. Some scholars believe that when ancient bronze wares were cast, the added copper material did not melt completely due to the low furnace temperature, resulting in the existence of residual pure copper grains. Some scholars believe that the pure copper grains originate from “incompletely melted” mats Film "; some scholars believe that the bronze-rich tin phase is corroded by oxygen and hydroxyl radicals, due to the role of anti-alloy precipitation of pure copper grains. Although the formation mechanism of pure copper grains is still inconclusive, due to the close relationship between this problem and the casting process, it has always been the focus of metallurgy history. We studied the structure of ancient bronze mirror components and casting process for several years, we found that some copper mirror and other bronze vessels, which