稀土元素对铜合金显微组织的影响

RARE EARTH'S EFFECT TO THE MICROSTRUCTURE OF Cu-Cr ALLOY

以CuCr合金为基础,比较研究了加入La-Ce混合稀土(RE)前后,不同状态下两种合金组织上出现的变化。研究结果表明:RE的加入使铸态下合金的亚结构更细小:淬火态下初生Cr相的长大程度比CuCr合金中的小;时效态下,合金中析出的第二相颗粒尺寸更小,分布更弥散。此外,RE对Cr在Cu基体中的固溶量也表现出一定的影响。

The microstructure differences of Cu-Cr and Cu-Cr-RE alloys in different states are analysed in this paper.After comparing,we find the Rare Earth makes the alloys's substructure smaller in casting;the growth of the primary phase of Cr less in quenching;and the size of the second phases smaller and the distribution evener.Rare Earth can also affect the solid solubility of Cr in the metrics.