Abstract A bearing is an essential mechanical element that is used to fix the axis of a rotating machine and helps rotate the shaft while supporting its weight and load. Numerous types of bearings have been developed depending on the functions and sizes of the machines in which they are utilized. In particular, power generating units such as gas turbines use medium or large hydraulic bearings for smooth operation. White metal is a tin alloy and a soft material that is often bonded to the inner surfaces of medium and large bearings to lubricate and protect the bearing shafts. Currently, gravity or centrifugal casting is used to bond the white metal to the surface of the bearing material. The casting process requires pretreatments such as chemical treatment and preheating and has many disadvantages with respect to the work environment, worker safety, productivity, and potential for automation. In this study, the process of binding white metal to bearings is simplified and improved by applying a laser cladding using powdered white metal. Depositing a metal that has a very low melting point compared to the base metal is different from the conventional cladding process; therefore, the focus of this work is to analyze the new cladding procedure for various process conditions. White metal specimens fabricated with this laser cladding were evaluated using cross-section images, hardness tests, and energy-dispersive X-ray spectroscopy analysis.

中文翻译：

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使用低熔点金属进行激光熔覆表面改性的表征

摘要 轴承是一种必不可少的机械元件，用于固定旋转机械的轴心，并在支撑其重量和载荷的同时帮助轴旋转。根据使用它们的机器的功能和尺寸，已经开发了多种类型的轴承。特别是燃气轮机等发电机组使用中型或大型液压轴承以确保平稳运行。白色金属是一种锡合金和一种柔软的材料，通常粘合在大中型轴承的内表面以润滑和保护轴承轴。目前，重力或离心铸造用于将白色金属粘合到轴承材料的表面。铸造工艺需要进行化学处理和预热等预处理，在工作环境、工人安全、生产力和自动化的潜力。在这项研究中，通过使用粉末状白色金属应用激光熔覆，简化和改进了将白色金属粘合到轴承上的过程。沉积与母材相比熔点非常低的金属与传统的熔覆工艺不同；因此，这项工作的重点是分析各种工艺条件下的新熔覆工艺。使用横截面图像、硬度测试和能量色散 X 射线光谱分析对用这种激光熔覆制造的白色金属试样进行了评估。沉积与母材相比熔点非常低的金属与传统的熔覆工艺不同；因此，这项工作的重点是分析各种工艺条件下的新熔覆工艺。使用横截面图像、硬度测试和能量色散 X 射线光谱分析对用这种激光熔覆制造的白色金属试样进行了评估。沉积与母材相比熔点非常低的金属与传统的熔覆工艺不同；因此，这项工作的重点是分析各种工艺条件下的新熔覆工艺。使用横截面图像、硬度测试和能量色散 X 射线光谱分析对用这种激光熔覆制造的白色金属试样进行了评估。