纯钛铸件化学抛光的实验研究

A Study of Chemical Polishing of Pure Titanium Castings

目的:探讨纯钛铸件的化学抛光效果。方法:3组板状铸件(15mm×15 mm×1.4 mm)分别给予以下3种处理:A组铸件喷砂后不做其它处理;B组铸件喷砂后常规手工研磨;C组铸件喷砂后化学抛光。测试B、C两组铸件的减重率(-wt％),各处理组铸件的表面粗糙度(Ra值)和表面氧化膜厚度。结果:肉眼观察经化学抛光的纯钛铸件表面呈镜面状。化学抛光组的减重率高于手工研磨组,Ra值小于手工研磨组(P<0.05)。其表面存在约8μm厚的氧化膜,且均匀一致。结论:纯钛铸件化学抛光效果良好,具有临床推广价值。

Objective:The purpose of this study was to investigate the effects of chemical polishing on pure titanium castings. Methods: Three groups of pure titanium castings (15 mm x 15 mm x 1.4 mm) were prepared, and each group contained 5 castings. Group A was sandblasted for 5 minutes; After sandblasted, Group B and C were polished using conventional machine-grinding and chemical- polishing method for about 60 seconds, respectively. And then the weight loss of Group B and Group C, surface roughness and thickness of oxidized membrane of all castings were measured. The effects were evaluated by naked eye examination. Results: The castings in Group C were polished chemically to mirror surface. The weight loss of the castings polished chemically was more than that polished using the conventional machine-grinding method. The Ra values were significantly different among the three groups. The metalloscopy indicated that the surface was evenly covered with a layer of oxidized membrane of 8 fan after polishing. Conclusion : The chemical polishing of pure titanium castings is efficient method, which can be available in clinic.