钛合金冷床熔炼技术进展  

The Development of Cold Hearth Melting Technique

作　　者：张英明[1] 周廉[2] 孙军[1] 韩明臣[2] 舒滢[2] 杨建朝[2] 

机构地区：[1]西安交通大学材料科学与工程学院,陕西西安710049 [2]西北有色金属研究院,陕西西安710016

出　　处：《钛工业进展》2007年第4期27-30,共4页Titanium Industry Progress

摘　　要：钛合金铸锭中经常出现高密度夹杂和低密度夹杂等冶金缺陷,这种夹杂缺陷成为钛合金零部件的疲劳裂纹源,降低零部件的使用寿命,用于航空发动机,可能引起机毁人亡的重大灾难。常规的真空电弧三次熔炼不能去除原料中的高密度夹杂和低密度夹杂。为了生产优质高洁净航空发动机转动件用钛合金,在20世纪80年代末,国际上引入了冷床熔炼技术。本文主要讨论了钛合金中典型的冶金缺陷和冷床熔炼技术的原理、应用和发展。The metallurgical defects, such as high density inclusion and low density inclusion, always appear in the titanium alloys, which are the fatigue crack sources in the titanium components and lower the application life of the components. This kind of defects can cause disaster in the aero-engine usage. The traditional triple vacuum arc melting process can not eliminate the high density inclusions and the low density inclusions in the raw materials. To produce the premium quality and high clean aero-engine used titanium alloys, in the last century 80＇, the cold hearth melting technology was introduced in the world. This article describes the typical metallurgical defects in the titanium alloys, the melting principle of the cold hearth melting technology, the application and the development of the cold hearth melting technology.

关 键 词：钛合金 真空熔炼 冷床熔炼 冶金缺陷 

分 类 号：TG27[金属学及工艺—铸造]