Problems related to component wear are one of the biggest challenges faced by industrial sectors such as agriculture, mining, and oil and gas. Coating application has been a good alternative to mitigate these problems. Ni-Cr-B-Si alloys are recognized for their abrasion and adhesion resistance properties. In this context, a comparison between the mechanical wear of Ni-Cr-B-Si 1545-00 deposited via laser metal deposition is performed in two setups. The goal was to study the effect of the cladding direction in the coating wear resistance. The coated samples were prepared according to the dimensions required by ASTM G65, a dry sand/rubber wheel test standard. Using procedure A of ASTM G65, pauses were done every 5 min for volumetric loss measurement. In parallel, the coating cross section was metallographically prepared and evaluated via optical microscopy and scanning electron microscopy (SEM)-x-ray dispersive energy spectroscopy (EDX). Vickers microhardness profile was also measured, and its value reached 580 HV1. Worn surfaces were evaluated via SEM-EDX; however, this time the microscopy technique was used to characterize wear mechanisms. In the microhardness profile analysis, the average was much lower in the diluted region and the heat-affected zone. As to the tribological test results, volumetric loss increased in proportion to the test time. In the first setup, coating presented an average volumetric loss of 37% higher than the second setup. This result can be attributed to the dry sand/rubber wheel test direction. This work's outcome indicates that a coated component's lifetime may be improved when attention is given to coating orientation and component preferential mechanical wear direction.

中文翻译：

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激光金属沉积方向对Ni-Cr-B-Si涂层耐磨性和粘着磨损性的影响

与部件磨损相关的问题是农业、采矿、石油和天然气等工业部门面临的最大挑战之一。涂层应用是缓解这些问题的一个很好的选择。Ni-Cr-B-Si 合金因其耐磨性和抗粘附性而受到认可。在这种情况下，在两种设置中对通过激光金属沉积沉积的 Ni-Cr-B-Si 1545-00 的机械磨损进行了比较。目的是研究包层方向对涂层耐磨性的影响。根据ASTM G65（一种干砂/橡胶轮测试标准）要求的尺寸制备涂层样品。使用 ASTM G65 的程序 A，每 5 分钟暂停一次以进行体积损失测量。在平行下，涂层横截面通过金相学制备，并通过光学显微镜和扫描电子显微镜 (SEM)-x 射线色散能谱 (EDX) 进行评估。还测量了维氏显微硬度分布，其值达到了 580 HV1。通过 SEM-EDX 评估磨损表面；然而，这一次使用显微镜技术来表征磨损机制。在显微硬度分布分析中，稀释区和热影响区的平均值要低得多。对于摩擦学测试结果，体积损失与测试时间成比例增加。在第一个设置中，涂层的平均体积损失比第二个设置高 37%。这个结果可以归因于干砂/橡胶轮测试方向。这项工作的结果表明涂层组件'