不同铸造条件对纯钛铸件表面粗糙度的影响  

Effects of casting temperature and embedding materials on the surface roughness

作　　者：程静涛[1] 郭天文[1] 王宝成[1] 

机构地区：[1]第四军医大学口腔医学院修复科

出　　处：《实用口腔医学杂志》1998年第2期120-122,共3页Journal of Practical Stomatology

摘　　要：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 study the effects of casting temperature and embedding materials on the surface roughness of cast pure titanium.Methods:Gr2 pure titanium was coated with phosphateonly,or phogphate after zirlonia flour inner coating,and then cast at room temperature,300℃ or 900℃,respectively,with a LZ Dental Titanium Casting Machine.Cobalt chromium castings were employed with phosphate and ethyl silicate as controls.The surface roughness (Ra) was analyzed with a computer software. Results:The Ra values obtained from the pure titanium cast with zirconio flour coating at room temperature or 300℃ were not significantly defferent ( P > 0.05 ),but significantly lower than those obtained under other casting conditions and the cast cobalt chromium( P <0.01).Conclusion:Casting of pure titanium with zirconia flour coated at 300℃ or less may result in small Ra value of the cast titanium surface.

关 键 词：钛 牙科铸造技术 表面粗糙率 

分 类 号：R783.2[医药卫生—口腔医学]