氧流量变化下喷射熔敷镍基WC-Co涂层的摩擦学行为

IF 1.5 Q3 ENGINEERING, MECHANICAL
H. Jiménez, J. Olaya, J. Alfonso
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引用次数: 4

摘要

分析了镍基WC-Co涂层的摩擦学性能。使用SuperJet Eutalloy沉积设备,通过喷涂和熔断工艺将涂层沉积在灰铸铁基体上,改变火焰中的氧气流动条件。利用x射线衍射(XRD)技术对涂层的晶体结构进行了表征。用努氏显微硬度计测量了涂层表面和横截面的显微硬度。利用扫描电子显微镜(SEM)和共聚焦显微镜(共聚焦显微镜)检测了涂层和摩擦表面的形貌和形态特征,并用能量色散x射线能谱仪(EDS)测量了化学成分。使用涂层的横截面,通过内聚-粘附划痕测试来检测涂层的摩擦学性能。此外,采用ASTM G99标准下的销盘法和ASTM标准G65砂/橡胶轮磨损试验进行了两项磨损试验。涂层的磨损与金属基体的孔隙率密切相关;此后,在磨料磨损试验中,孔隙率越高,涂层硬度越低;同样,低硬度与高磨损有关。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Tribological Behavior of Ni-Based WC-Co Coatings Deposited via Spray and Fuse Technique Varying the Oxygen Flow
The tribological behavior of Ni-based WC-Co coatings is analyzed. The coatings were deposited on gray cast iron substrates in a spray and fuse process using SuperJet Eutalloy deposition equipment, varying the oxygen flow conditions in the flame. The crystallographic structure of the coatings was characterized via the X-ray diffraction (XRD) technique. The microhardness was measured on the surface and in cross sections of the coatings by means of a Knoop microhardness tester. The topography and the morphological characteristics of the coatings and the tribo-surfaces were examined using scanning electron microscopy (SEM) and confocal microscopy, while the chemical composition was measured by means of energy-dispersive X-ray spectroscopy (EDS). The tribological behavior of the coatings was examined via a cohesion-adhesion scratch test, using cross sections of the coatings. Furthermore, two wear tests were carried out, using the pin-on-disk method under ASTM G99 standard and an ASTM standard G65 sand/rubber wheel abrasion wear test. The wear of the coatings showed a close relationship to the porosity in the metal matrix; since then, in the abrasive wear test, a high porosity is related with lower hardness in the coatings; likewise, a low hardness is related with a high wear.
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来源期刊
Advances in Tribology
Advances in Tribology ENGINEERING, MECHANICAL-
CiteScore
5.00
自引率
0.00%
发文量
1
审稿时长
13 weeks
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