Plasma surface alloying with molybdenum and carburization of TiAl based alloys
来源期刊：中国有色金属学报(英文版)2005年第z3期
论文作者：刘小萍 徐重 许玮 梁文萍 郭朝丽 田文怀
文章页码：420 - 424
Key words：intermetallics； plasma alloying； plasma carburization； friction coefficient
Abstract: A hard layer which is rich in Mo and carbon on the surface of TiAl based alloy was formed after plasma Mo alloying followed by plasma carburization. The process parameters of plasma Mo alloying and plasma carburization were modified. The chemical composition and the thickness of the formed layer are obviously affected by the temperature used during alloying and carburization. The surface layer of TiAl treated by carburization at 1000℃ following Mo alloying at 1125℃ consists of a hard layer with thickness of 20μm and has a graded distribution in chemical composition. The pin-on-disk wear test shows that the frictional properties of TiAl disk treated only by carburization are improved. The TiAl surface treated by both Mo alloying and carburization possesses lower friction coefficient than that of carburized TiAl.
