几种Cu-Cr合金的晶体生长特点  

The Action of Crystal Growth For Cu-Cr Alloy With Different Contents Of Cr

作　　者：虞明香[1] 王宥宏[2] 崔小朝[1] 

机构地区：[1]太原科技大学,太原030022 [2]西安交通大学理学院,西安710049

出　　处：《铸造设备研究》2004年第6期28-31,共4页Research Studies On Foundry Equipment

基　　金：山西省回国留学人员基金

摘　　要：介绍了在电弧熔炼、水冷铜模工艺条件下,几种不同含Cr量Cu-Cr合金的晶体生长特点。分析了其微观组织的形成原因。在较大的富Cr粒子的心部有一暗色的区域,在其周围有一亮色圆环,这是一种罕见的显微组织。随着Cu-Cr合金中含Cr量的增加,合金组织变的越来越差,富Cr相的分布越来越不均匀。该工艺方法可以用于制作Cr含量≤10%的Cu-Cr合金,但无法保证Cr含量≥15%的触头材料具有良好的性能。The action of crystal growth of Cu-Cr alloy with several compositions melted by an arc furnace and cooled by a copper mold is studied in the article. The forming cause of their microstructures is analyzed. There is a dark zone in all big Cr-rich particles and there is a bright ring around the dark zone. This is a kind of very peculiar microstructure. As Cr content increases, the microstructure of crystal particle becomes more and more undesirable and the distribution of Cr-rich phase becomes more and more misproportion in ingots. For the Cu-Cr alloy of Cr≤10 wt.%, the method of arc-melting can been used, but not for the Cu-Cr alloy of Cr≥15 wt.%.

关 键 词：Cu—Cr合金 水冷铜模 晶体生长 

分 类 号：TG27[金属学及工艺—铸造]