烘烤温度对钛接圈与Ni-Cr合金结合界面性能的影响

The effects of elevating temperature on the properties of the interface between titanium cylinder and Ni-cr alloy

目的：找出适宜烘烤温度使钛接圈与Ｎｉ－Ｃｒ合金形成最理想的界面结合。方法：选定６００℃、６５０℃、７００℃、８００℃钛接圈烘烤温度，浇注Ｎｉ－Ｃｒ合金的结合体。显微硬度计、扫描电镜、能谱分析仪，对钛接圈、结合界面、Ｎｉ－Ｃｒ合金部进行分析。结果：（１）钛接圈烘烤６００℃、８００℃，铸入Ｎｉ－Ｃｒ合金，扫描电镜发现有明显的界面反应区。（２）６５０℃、７００℃时铸入Ｎｉ－Ｃｒ合金，两金属间出现金属－金属接合形成区，该部Ｖｉｃｋｅｒ硬度与Ｎｉ－Ｃｒ合金、钛接圈硬度差异不大，但也有部分界面反应。（３）能谱分析显示在Ｎｉ－Ｃｒ合金部、接合部、钛接圈部均有Ｎｉ、Ｃｒ、Ｔｉ、Ｍｏ、Ｓｉ等元素，且Ｔｉ元素检出较少。结论：选用钛接圈烘烤温度为６５０℃～７００℃条件下，浇注Ｎｉ－Ｃｒ合金较好，益于种植瓷修复体质量。

Objective: To study the effects of elevating temperature on the properties of the interface between titanim cylinder and Ni-Cr alloy. Methods: Scanning electron microscopy, energy dispersive spectrocopy and vicker's hardness measurement were employed to observe the interface of pure titanium cylinder(TA 2) with Ni-Cr alloy(YHK 1) after elevation at 600℃, 650℃, 700℃ and 800℃ respectively. Results: Interface reaction between the titanium cylinders and Ni-Cr alloy was observed after elevation at 600℃ or 800℃, however metal to metal union and higher vicker's hardness values(similar to that of Ni Cr alloy or titanium connection) of the uniom were observed after 650℃ or 700℃ elevation. Conclusion: 650℃ or 700℃ elevation may be suitable for the required properties of the interface between titanium cylinder and cast Ni-Cr alloy.