Heat and mass transfer aspects of laser deposition of Ni/WC wear resistant metal matrix composites

该研究和培训项目的重点是开发一个模型来预测使用激光熔覆技术沉积的金属涂层的几何形状。激光熔覆提供了一定程度的工艺控制和低热量输入，这是沉积用于油砂加工、采矿、测井和重型设备制造的高耐磨金属涂层所必需的。激光熔覆的模型已经开发出来，但它们依赖于复杂的数值方法和计算机模拟。工业从业者一直无法理解并在生产中实施这些模型，他们继续使用盲目的试错方法来开发新合金系统的程序。该项目将首次以科学和系统的方式研究控制过程的物理学，并开发数学表达式来解释观察到的现象之间的关系。该方法将在很大程度上依赖于加拿大焊接和连接中心和阿尔伯塔大学的焊接涂层实验设备和专业知识。理论工作将与高速视频分析和金相学相结合。所获得的结果将立即用于合作伙伴公司（Apollo Clad），并将广泛适用于其他公司和行业。该提案将涉及一名博士生，两名硕士生和四名本科生的培训。

This research and training project focuses on developing a model to predict geometry of metallic coatings deposited using laser cladding technology. Laser cladding offers a degree of process control and low heat input necessary for the deposition of high wear resistant metallic coatings used in oil sands processing, mining, logging, and manufacturing of heavy equipment. Models of laser cladding have been developed, but they rely on complex numerical methods and computer simulations. Practitioners of industry have been unable to understand and implement these models in production, and they continue to use a blind trial and error approach to developing procedures for new alloy systems. This project will study for the first time in a scientific and systematic way, the physics that control process and develop mathematical expressions that will explain relationships between the observed phenomena. The approach will rely heavily on the experimental equipment and expertise in weld coatings at the Canadian Centre for Welding and Joining and University of Alberta. Theoretical work will be combined with high speed video analysis and metallography. The results obtained will be of immediate use to the partner company (Apollo Clad) and will have broad applicability to other companies and industries. This proposal will involve the training of one PhD, two MSc, and four undergraduate students.