【作者】 王振霞； 刘俊； 谢燕翔； 贺志勇； 唐宾；

【Author】 WANG Zhenxia LIU Jun XIE Yanxiang HE Zhiyong TANG Bin Institute of Surface Engineering, Taiyuan University of Technology, Taiyuan 030024

【机构】 太原理工大学表面工程研究所；

【摘要】 本文采用双辉等离子表面合金化技术在 Ti6A14V(TC4)合金表面形成 Ti-Nb 合金层。研究了等离子渗金属处理中放电气压、基体温度、扩散时间对 Ti-Nb 合金层形成的影响规律,并对合金层显微组织、相结构特征进行了观察与分析。结果表明,形成理想 Ti-Nb 合金层所需放电气压为60-65Pa,适宜的处理温度为950～1000℃;温度、时间的影响规律符合一般的扩散定律;XRD 结果表明渗层由 Nb 在α-Ti 和β-Ti 中形成的固溶体组成。通过对比基体和 Ti-Nb 合金层的电化学腐蚀性能,表明 Ti-Nb 合金层耐腐蚀性明显提高。更多还原

【Abstract】 Niobium alloyed layer was prepared on surface of TC4 by plasma alloying process.The effects of discharge gas pressure, processing temperature and diffusion time on the alloying process were investigated.Micro-structure and phase structure of the modified layer were observed and analyzed.The results indicated that suitable discharge gas pressurer was 60-65 Pa,the appropriate processing temperature range was 950～1 000 ℃.The kinetics of the alloying process was in accordance with general diffusion law. XRD analysis showed the modified layer was composed of Nb and α-Ti and β-Ti solid solution.Electrochemical tests showed that the corrosion resistance of the alloyed surface was improved obviously compared to the original material.更多还原