牙科技术实验室条件下金与钛合金可焊性的评定

Q3 Materials Science
G. Jania, J. Żmudzki, S. Topolska
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引用次数: 0

摘要

在牙科实践中,有必要在牙科技术实验室的条件下将金与钛焊接,这是困难的。目的是利用假肢激光焊接机评估纯金与钛合金Ti6Al4V的可焊性。使用珠宝拉杆(GOLDPORT, Szczecin, Poland)制作直径为0.4 mm的金丝,焊接到种植牙基牙螺钉(MegaGen)的钛合金Ti6Al4V基板上。牙科激光焊接参数(Bego laser Star T plus)为230 V;6.5女士;2.5赫兹;激光光斑0.3 mm,氩气吹制。样品每20 s放入树脂中,研磨(500-4000 SiC),抛光(Al2O3悬浮液)和蚀刻(Kroll溶液),然后在光学显微镜下观察。有焊接良好和连接不良的区域。在初始焊点附近,不可见或稀疏的不连续和空洞。在焊接良好的重熔区发现了枝晶组织和钛与Ti3Au相的两相组织。热影响区约为20微米。使用光学显微镜,精确的相识别需要进一步的研究。焊接强度评估需要进一步的显微硬度和承载能力测试。可焊性与纯金的模型系统有关。对于尺寸小于0.4 mm的元件,应考虑使用光斑较小的激光,以便更好地控制重熔区域和元件的机械定位,以稳定和避免不连续和空洞。激光光斑约为0.3 mm的假肢激光焊接可以在稳定的拼接条件下获得直径0.3 mm且尺寸大于0.4 mm的焊接良好的零件。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Assessment of gold with titanium alloy weldability in conditions of a dental technique laboratory
In dental practice, there is necessary to weld gold with titanium under the conditions of a dental technique laboratory, which is difficult. The aim was to assess the weldability of pure gold with the titanium alloy Ti6Al4V using a prosthetic laser welding machine.Gold wire in a diameter of 0.4 mm made with the use of a jewellery drawbar (GOLDPORT, Szczecin, Poland) was welded to a titanium alloy Ti6Al4V substrate of dental implant abutment screw (MegaGen). Dental laser welding parameters (Bego Laser Star T plus) were 230 V; 6.5 ms; 2.5 Hz; laser spot 0.3 mm, and argon blow. Samples were included in resin, ground (500-4000 SiC), polished (Al2O3 suspension) and etched (Kroll solution) per 20 s before observation under a light microscope.There were well-welded and poorly joined zones. The discontinuities and voids there were not visible or sparse next to the initial weld point. Dendritic structure at well-welded remelting zones and two-phase microstructure of titanium and Ti3Au phase were found. The heat-affected zone was about of 20 microns.Light microscopy was used, and precise phase identification required further investigations. Weld strength assessment requires further micro-hardness and load-bearing ability tests. Weldability concerns the model system with pure gold.In the case of elements with dimensions below 0.4 mm, the use of a laser with a smaller spot should be considered for better control of the remelting zone and mechanical positioning of the elements in order to stabilize and avoid discontinuities and voids.Prosthetic laser welding with a laser spot about of 0.3 mm allows to obtain well-welded parts of 0.3 mm in diameter under stable stitching conditions and higher than 0.4 mm in dimensions.
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来源期刊
Archives of materials science and engineering
Archives of materials science and engineering Materials Science-Materials Science (all)
CiteScore
2.90
自引率
0.00%
发文量
15
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