【摘要】 针对钛齿表面的氧化渗透问题,配制新型涂料,用熔模铸造法原位制取钛片试样模拟钛齿生产过程。利用能谱(EDX)和X射线衍射(XRD)分析钛片的化学组成和物相,普通金相显微镜观察显微组织。结果表明,配制的新型涂料能将钛片表面氧化渗透层的厚度降至50μm左右,钛片的渗入元素为钨和钇。显微硬度分析表明,钨的渗入恶化了钛片的机械性能和使用性能,在蜡模表面均匀涂敷涂料可消除钇的渗入。钛片表面的氧化渗透是由铸造过程中熔钛与涂料在界面处发生冶金反应的结果。更多还原

【Abstract】 In order to solve the problem of the oxidization and infiltration on the surface of titanium tooth, a kind of new coating was prepared and as-cast titanium chip samples were made by investment casting for simulating the manufacture process of titanium tooth. Chemical composition and phases of the as-cast titanium chip were analyzed by using energy spectrum and XRD. Meanwhile microstructure and microhardness were observed and tested, respectively. The analyzing results show that the prepared coating can reduce the depth of the oxidization and infiltration layer of the as-cast chip to about 50 μm. The elements infiltrating into titanium chip are tungsten and yttrium. The infiltration of tungsten has deteriorated effect on mechanical properties and thus service performance of the as-cast titanium chip, while the yttrium infiltration can be prevented through uniformly coated a new coating on the surface of wax mould. Further analyzing reveals that the oxidization and infiltration on the surface of the as-cast titanium chip could be explained by the metallurgical reaction on the interface between titanium melt and the coating during casting.更多还原