牙科铸造钴铬合金氩弧焊接后的力学性能分析  

Analysis of mechanical properties of Co-Cr dental casting alloy after argon-arc welding

作　　者：刘好术 姚谊晶[2] 杨志刚[1] 

机构地区：[1]山东省高密市人民医院口腔科,高密261500 [2]山东省千佛山医院口腔科,济南250001

出　　处：《口腔材料器械杂志》2018年第1期29-31,45,共4页Chinese Journal of Dental Materials and Devices

基　　金：山东大学土建与水利学院测试中心

摘　　要：目的研究牙科铸造用高熔钴铬合金氩弧焊接后的力学性能,为临床口腔修复的应用提供实验依据。方法用直径2mm蜡线,常规包埋,牙科铸造钴铬合金铸造长约5cm的金属段20根,随机分成2组,每组10根。A组不做处理;B组从中间切断,用同材料做焊丝,氩弧焊接。然后分别测试其维氏硬度(HV10)、拉断力、屈服强度和延伸率等力学性能。结果焊接后的牙科铸造钴铬合金的维氏硬度、拉断力、屈服强度和延伸率等,几乎与未焊合金相同,经χ~2计算,P>0.05。结论氩弧焊接牙科高熔铸造钴铬合金的力学性能良好,可考虑用于牙科铸造支架断裂焊接,在金属支架上增加人工牙、高熔铸件缺陷修补以及圆锥形套筒冠外冠与支架的焊接等方面。Objective To study the mechanical properties of dental casting Co-Cr alloy after argon-arc welding, and to provide a theoretical basis for clinical application. Methods After conventional invest by using 2 mm wax string, 20 metal segmentswith 5cm in length were produced using dental Co-Cr alloy. They were randomly divided into 2 groups with 10 pieces in each group. The samples in group B was cut in the middle, using the same material and argon-arc welding. Group A, the samples without any treatment was used asthe control group. Both groups were tested by Vickers-hardness （HV10） , tensile force, yield strength and elongation. And the atomic structures of the welding zone were observed by the electron microscope. Results no statistically significant difference was observed in Vickers-hardness （HV10） , tensile force, yield strength and elongation between two groups （P 〉0.05）. Conclusions Dental casting Co-Cr alloy welded by argon-arc technique has good mechanical poperties. It can be used for welding fractured casting framework, conical telescopic crown and frame.

关 键 词：铸造钴铬合金 氩弧焊接 力学性能 

分 类 号：R783.1[医药卫生—口腔医学]