论文部分内容阅读
目的：探讨包埋料及铸造温度等铸造条件对纯钛铸件表面粗糙度的影响。方法：铸型用氧化锆包埋料内包埋后再用磷酸盐包埋料包埋或只用磷酸盐包埋料包埋片状蜡型，用ＬＺ型牙科铸钛机分别在室温、３００℃和９００℃条件下铸造Ｇｒ２型纯钛，并分别用磷酸盐和硅酸乙酯包埋料常规包埋铸造钴铬（Ｃｏ－Ｃｒ）合金作比较，使用表面粗糙度仪对铸件的表面粗糙度（Ｒａ）进行测定。结果：铸造纯钛时，使用氧化锆内包埋且铸型温度在３００℃或室温铸造的纯钛铸件Ｒａ值无显著差别（Ｐ＞０．０５），且低于其它条件下铸造的纯钛铸件和常规铸造的（Ｃｏ－Ｃｒ）合金的表面粗糙度（Ｐ＜０．０１）。结论：使用氧化锆内包埋且铸型温度在３００℃以下铸造Ｇｒ２型纯钛，其铸件表面粗糙度较小。
Objective: To investigate the effects of casting conditions such as embedding material and casting temperature on the surface roughness of pure titanium castings. Methods: After the mold was embedded in the zirconia-embedded material, it was embedded with phosphate-embedded material or embedded in sheet-shaped wax with phosphate-embedded material. LZ-type dental titanium casting machine was used respectively at room temperature, 300 Gr2 type pure titanium was cast at 900 ℃ and 900 ℃, respectively, and compared with conventional embedding cobalt-chromium alloy (Co-Cr) embedded with phosphate and ethyl silicate. The surface roughness Degree (Ra) was measured. Results: When casting pure titanium, there was no significant difference (P> 0.05) in the Ra value of the pure titanium castings embedded with zirconia and the casting molds cast at 300 ℃ or room temperature and lower than the cast pure titanium Surface roughness of castings and conventionally cast (Co-Cr) alloys (P <0.01). CONCLUSIONS: Gr2-type pure titanium, which is embedded in zirconia and cast at temperatures below 300 ° C, has a low surface roughness.