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.

医疗设备的制造和装配是一个广阔的领域，其中设备的不同部件的物理连接需要满足某些标准。这意味着它们应该具有适当水平的机械强度和功能特性，这取决于它们的应用。Baylis Medical Company（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导者，并已成为全球黄金标准，甚至通过提供创新，安全和有效的手术设备挽救了无数生命。这项世界领先技术和设备的主要制造挑战之一是将镍钛诺（NiTi）形状记忆合金与其他医用合金（例如，不锈钢，PtIr）。 滑铁卢大学和Baylis之间的拟议研究是系统地研究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，以实现医疗器械应用中小部件的可靠组装;也将加深对材料加工中小规模激光焊接NiTi/SS和NiTi/PtIr接头组织变化和相变的理解，提高了对母材和中间层化学成分、激光焊接工艺参数和结构对焊缝微观结构（包括IMC形成）和机械性能的影响的认识。 该合作项目的实施将加速Baylis新产品设计从加拿大的研发实验室走向工业规模，这将使加拿大的创新能力保持在领先地位，并使加拿大企业处于制造业和医疗行业技术发展的前沿。