Performance of thermal-sprayed WC-Cr3C2-Ni coatings in slurry erosion for hydrodynamic turbines

IF 1.6 Q4 MATERIALS SCIENCE, COATINGS & FILMS Tribology - Materials, Surfaces & Interfaces Pub Date : 2022-06-05 DOI:10.1080/17515831.2022.2078086

D. Bhosale, Chinmay Dorlikar, Amrut P. Bhosale, Viraj I. Pasare, Brijesh Maurya, Siddhesh Korgaonkar, Vinay Ginwal, T. Prabhu

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引用次数: 2

Abstract

ABSTRACT Hydrodynamic turbine and slurry pump components are frequently influenced by severe wear due to the impact of solid particles present in the water. A WC-based coatings deposited by thermal spray techniques is known for the protection against slurry erosion. In the present work, WC-Cr3C2-Ni powder was sprayed on a turbine steel substrate using high-velocity oxy-fuel (HVOF) and atmospheric plasma spray (APS) techniques. Microstructural and phase constitutions of as-sprayed coatings were examined. The effect of speed, slurry concentration and particle size on slurry erosion resistances of both coatings and substrate materials was comparatively studied in a slurry pot erosion tester. The results exhibit that the HVOF coating has better properties in terms of density, micro-hardness and slurry erosion resistance than those of APS coating. The improvement in slurry erosion resistance of bare turbine steel by using APS and HVOF coatings is approximately 37% and 62%, respectively. GRAPHICAL ABSTRACT

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热喷涂WC-Cr3C2-Ni涂层在水轮机浆液侵蚀中的性能

摘要：水动力涡轮机和泥浆泵部件经常受到水中固体颗粒的冲击而产生的严重磨损的影响。通过热喷涂技术沉积的WC基涂层已知用于防止浆料侵蚀。在本工作中，采用高速氧燃料（HVOF）和大气等离子体喷涂（APS）技术将WC-Cr3C2-Ni粉末喷涂在涡轮机钢基体上。研究了涂层的微观结构和相组成。在泥浆罐侵蚀试验机上，比较研究了速度、泥浆浓度和颗粒大小对涂层和基体材料抗泥浆侵蚀性能的影响。结果表明，HVOF涂层在密度、显微硬度和抗浆料侵蚀性方面均优于APS涂层。通过使用APS和HVOF涂层，裸涡轮钢的抗浆料侵蚀性分别提高了约37%和62%。图形摘要

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Tribology - Materials, Surfaces & Interfaces MATERIALS SCIENCE, COATINGS & FILMS-

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2.80

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0.00%

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