| Ti2AlNb合金双层辉光等离子表面渗钼的扩散行为研究 |
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| 引用本文： | 梁文萍,徐重,缪强,刘小萍,贺志勇.Ti2AlNb合金双层辉光等离子表面渗钼的扩散行为研究[J].中国航空学报,2006,19(3):255-259. |
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| 作者姓名： | 梁文萍 徐重 缪强 刘小萍 贺志勇 |
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| 作者单位： | [1]Research Institute of Surface Engineering, Taiyuan University of Technology, Taiyuan 030024, Chin [2]No.2 Research Institute of China Electronics Technology Group Corporation, Taiyuan 030024, China |
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| 基金项目： | The Commission of Science Technology and Industry for National Defense China |
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| 摘 要： | Ti2AlNb合金(O相)具有高的比强度、断裂韧性以及优良的抗蠕变性能,因而在航空制造中成为一种颇具吸引力的高温结构材料.但是,较差的耐磨性是其主要的缺陷并限制其实际应用.为解决这一问题,对Ti2AlNb合金进行双层辉光等离子表面渗Mo.探讨主要工艺参数对Mo的扩散行为的影响.采用扫描电镜(SEM)、X射线衍射(XRD)和辉光放电光谱仪(GDS)分析表面合金化层的成分分布和微观结构.测定从表面到中心的显微硬度变化曲线.结果表明温度与时间均对扩散过程具有显著的影响.最后通过回归分析计算出在优化的工艺温度980℃下的扩散系数.
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| 关 键 词： | Ti2AlNb合金(O相) 双层辉光等离子表面渗Mo 扩散 温度 时间 渗层深度 Ti2AlNb orthorhombic alloy double glow plasma surface molybdenizing diffusion temperature time depths of alloyed layer |
| 文章编号： | 1000-9361（2006）03-0255-05 |
| 收稿时间： | 2005-11-07 |
| 修稿时间： | 2006-02-25 |
Study on Mo Diffusion in Double Glow Plasma Surface Molybdenizing of Ti2AlNb |
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| LIANG Wen-ping,XU Zhong,MIAO Qiang,LIU Xiao-ping,HE Zhi-yong.Study on Mo Diffusion in Double Glow Plasma Surface Molybdenizing of Ti2AlNb[J].Chinese Journal of Aeronautics,2006,19(3):255-259. |
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| Authors: | LIANG Wen-ping XU Zhong MIAO Qiang LIU Xiao-ping HE Zhi-yong |
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| Institution: | 1. Research Institute of Surface Engineering, Taiyuan University of Technology, Taiyuan 030024, China;2. No.2 Research Institute of China Electronics Technology Group Corporation, Taiyuan 030024, China |
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| Abstract: | 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 microstructure 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 diffusion coefficient at optimized temperature of 980°C is calculated through regression analysis. |
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| Keywords: | Ti2AlNb orthorhombic alloy double glow plasma surface molybdenizing diffusion temperature time depths of alloyed layer |
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