Microstructural evolution and metallurgic reactions in dissimilar joints of Nitinol wire and medical alloys during laser microwelding

激光微焊接过程中镍钛诺丝和医用合金异种接头的微观结构演变和冶金反应

• 批准号: 576777-2022
• 负责人: Peng, PengP
• 金额: $ 2.91万
• 依托单位: University of Waterloo
• 依托单位国家: 加拿大
• 项目类别: Alliance Grants
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=760379
• 关键词: Microstructural; evolution; metallurgic; reactions; dissimilar

The manufacturing and fabrication of medical devices is a vast field in which the physical connection of devices' different parts is required to meet certain standards. This entails that they should have a pertinent level of mechanical strength and functional properties, depending on their applications. Baylis Medical Company (Baylis)'s Radio Frequency (RF) Puncture System is the world leader for creating controlled perforations in cardiac and vascular tissues and has been the world-wide gold standard or even saved countless lives through supplying innovative, safe and effective surgical devices. One of the major manufacturing challenges for this world leading technology and the devices is joining of Nitinol (NiTi) shape memory alloys to other medical alloys (e.g., stainless steel, PtIr) at a small scale. The proposed research between the University of Waterloo and Baylis is to systematically investigate the dissimilar laser microwelding of NiTi alloy to stainless steel (SS) and PtIr alloys, as well as laser microwelding enabled processing of NiTiPt high temperature shape memory wire to achieve a reliable assembly of small components for medical device applications; it will also deepen the understanding of microstructural changes and phase transformation of NiTi/SS and NiTi/PtIr joints during laser welding at a small scale in material processing, and improve the knowledge of the effects of base metal and interlayer chemical compositions, laser welding process parameters and configurations on the weld microstructure, including IMC formation, and mechanical properties. The implementation of this collaborative project will accelerate the new product design for Baylis moving from R&D laboratory to industry scale in Canada, which will keep Canada's innovation capability at the pioneer position and place Canadian businesses at the forefront of technology development in the manufacturing and medical industries.

医疗设备的制造和制造是一个广阔的领域，设备不同部件的物理连接需要满足一定的标准。这意味着它们应该具有适当水平的机械强度和功能特性，具体取决于它们的应用。 Baylis 医疗公司 (Baylis) 的射频 (RF) 穿刺系统是在心脏和血管组织中创建受控穿孔的世界领先者，已成为全球黄金标准，甚至通过提供创新、安全和有效的手术挽救了无数生命。设备。这一世界领先技术和设备的主要制造挑战之一是将镍钛诺 (NiTi) 形状记忆合金小规模连接到其他医用合金（例如不锈钢、PtIr）。 滑铁卢大学和贝利斯大学之间拟议的研究是系统地研究 NiTi 合金与不锈钢 (SS) 和 PtIr 合金的异种激光微焊接，以及 NiTiPt 高温形状记忆丝的激光微焊接加工，以实现可靠的组装用于医疗设备应用的小型元件；它还将加深对材料加工中小规模激光焊接过程中NiTi/SS和NiTi/PtIr接头微观结构变化和相变的理解，并提高对母材和层间化学成分影响、激光焊接工艺的认识焊接微观结构的参数和配置，包括 IMC 形成和机械性能。 该合作项目的实施将加速Baylis的新产品设计在加拿大从研发实验室走向产业规模，使加拿大的创新能力保持领先地位，使加拿大企业走在制造和医疗行业技术发展的前沿。