Study on Mo Diffusion in Double Glow Plasma Surface Molybdenizing of Ti_2AlNb

作     者：梁文萍 徐重 缪强 刘小萍 贺志勇 LIANG Wen-ping;XU Zhong;MIAO Qiang;LIU Xiao-ping;HE Zhi-yong

作者机构：Research Institute of Surface Engineering Taiyuan University of Technology Taiyuan 030024China No.2 Research Institute of China Electronics Technology Group Corporation Taiyuan 030024China 

出 版 物：《Chinese Journal of Aeronautics》 (中国航空学报（英文版）)

年 卷 期：2006年第19卷第3期

页      面：255-259页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：The Commission of Science Technology and Industry for National Defense China 

主　　题：Ti2AlNb orthorhombic alloy double glow plasma surface molybdenizing diffusion temperature time depths of alloyed layer 

摘      要：Ti2AlNb orthorhombic alloy is an attractive high temperature structural material for aero-industries due to its high specific strength and fracture toughness as well as excellent creep resistance. However, insufficient wear-resistance is the main drawback which restricts the actual uses of this alloy in many circumstances. A double glow plasma surface molybdenizing on Ti2AlNb alloy is carried out as an attempt to resolve this problem. This paper deals with the effects of key process parameters on the diffusion behavior of Mo. The composition distribution and microstructare of the alloying layer are analyzed by SEM, XRD and GDS. Micro-hardness distribution profile is measured along the distance from surface to center. The results indicate that both the temperature and the processing time have significant effects on the diffusion process. Finally, the dif- fusion coefficient at optimized temperature of 980℃ is calculated through regression analysis.