稀土对D型石墨铸铁强化机理的研究  

Research on the Function of RE on the Strengthening Cast Iron with D Form Graphite

作　　者：李鸿义 

机构地区：[1]山西省机电设计研究院,山西太原030009

出　　处：《铸造》2006年第8期853-855,共3页Foundry

摘　　要：通过试验研究,发现微量稀土能促进D型石墨铸铁中初晶奥氏体骨架的生长,对强化基体组织有一定的作用。微量稀土能细化D型石墨,石墨数量增多,石墨生长前端钝化、分枝、花瓣状形态也有所改善,大大减轻了石墨对基体的破坏作用,从而提高D型石墨铸铁的力学性能。It is discovered by test that micro RE can promote formation of austenite in cast iron with D form graphite, which can strengthen the cast iron matrix. Micro RE can refine the D form graphite and improve the morphology of graphite, and so increase the number of graphite and decrease the damage effect of graphite on matrix and improve the properties of cast iron.

关 键 词：D型石墨 铸铁 稀土 机理 

分 类 号：TG255[金属学及工艺—铸造]