氩弧熔覆技术在 AISI 304 不锈钢上制造的 TiB2-CoTi 复合涂层摩擦学性能实验研究

IF 3.2 3区 材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS
Ravi Kumar, Anil Kumar Das
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引用次数: 0

摘要

本研究通过氩弧熔覆(AAC)技术在 AISI 304 不锈钢(SS)基材上制造了 TiB2-CoTi 复合涂层。研究了 AAC 加工电流和钛(Ti)含量的重量百分比对涂层机械性能和磨损率的影响。使用场发射扫描电子显微镜、能量色散光谱和 X 射线衍射测定了所生产涂层的微观结构和元素分布图以及相分析。结果表明,涂层与基体的冶金结合良好,具有柱状和网状树枝状结构。复合涂层的表层主要由 TiB2、NiTi、TiB、Co3Ti、Co2B、CoTi 和 α-Ti 相组成。复合相的成分有利于提高显微硬度和降低磨损率。TiB2-CoTi 复合涂层的最大平均显微硬度为 1582 HV0.1。这比 AISI 304SS 基体硬度(223 HV0.1)高出七倍。经测定,TiB2-CoTi 涂层的磨损率为 2.53 × 10-8 g/N m,而 AISI 304SS 基体的平均磨损率为 24.39 × 10-8 g/N m。它在挑战性条件下的耐久性和性能表明,它适用于对耐久性和性能要求极高的应用领域。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Experimental Investigation on Tribological Performance of TiB2-CoTi Composite Coating Fabricated on AISI 304 Stainless Steel by Argon Arc Cladding Technique

In this study, TiB2-CoTi composite coatings were fabricated on AISI 304 stainless steel (SS) substrate through argon arc cladding (AAC) technique. The effects of AAC processing currents and weight percentage of titanium (Ti) content on mechanical and wear rate of the coatings have been examined. Microstructural and element distribution maps, as well as phase analysis of the produced coating, were determined using field emission scanning electron microscopy, energy-dispersive spectroscopy, and x-ray diffraction. Results revealed that the coating exhibited good metallurgical bond to the substrate with columnar and network-shaped dendrite structure. The top surface of composite coatings was mainly comprised of TiB2, NiTi, TiB, Co3Ti, Co2B, CoTi, and α-Ti phases. Components of the composite phases were beneficial for improved microhardness and reduced the wear rates. The maximum average microhardness of TiB2-CoTi composite coating was achieved as 1582 HV0.1. This is significantly seven times higher than that of AISI 304SS substrate hardness (223 HV0.1). The wear rate of TiB2-CoTi coating was determined to be 2.53 × 10−8 g/N m, whereas average wear rate of AISI 304SS substrate was 24.39 × 10−8 g/N m. The wear resistance of the TiB2-CoTi coating was 9 times higher than that of AISI 304 SS substrate. Its durability and performance under challenging conditions suggest that it is suitable for applications that demand superior durability and performance.

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来源期刊
Journal of Thermal Spray Technology
Journal of Thermal Spray Technology 工程技术-材料科学:膜
CiteScore
5.20
自引率
25.80%
发文量
198
审稿时长
2.6 months
期刊介绍: From the scientific to the practical, stay on top of advances in this fast-growing coating technology with ASM International''s Journal of Thermal Spray Technology. Critically reviewed scientific papers and engineering articles combine the best of new research with the latest applications and problem solving. A service of the ASM Thermal Spray Society (TSS), the Journal of Thermal Spray Technology covers all fundamental and practical aspects of thermal spray science, including processes, feedstock manufacture, and testing and characterization. The journal contains worldwide coverage of the latest research, products, equipment and process developments, and includes technical note case studies from real-time applications and in-depth topical reviews.
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