温度和载荷对激光熔覆FeCrSiNiCoC涂层摩擦学行为的影响

Effect of Temperature and Load on Tribological Behavior in Laser-Cladded FeCrSiNiCoC Coatings.

作者信息

Long Haiyang, Hao Wei, Ma Rucheng, Gui Yongliang, Song Chunyan, Qin Tieyu, Zhang Xuefeng

机构信息

School of Metallurgy and Energy, North China University of Science and Technology, Tangshan 063210, China.

Tangshan Key Laboratory of Special Metallurgy and Material Preparation, North China University of Science and Technology, Tangshan 063210, China.

出版信息

Materials (Basel). 2023 Apr 21;16(8):3263. doi: 10.3390/ma16083263.

DOI:10.3390/ma16083263

PMID:37110100

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10141079/

Abstract

The FeCrSiNiCoC coatings with fine macroscopic morphology and uniform microstructure were made on 1Cr11Ni heat resistant steel substrate by a laser-based cladding technique. The coating consists of dendritic γ-Fe and eutectic Fe-Cr intermetallic with an average microhardness of 467 HV ± 22.6 HV. At the load of 200 N, the average friction coefficient of the coating dropped as temperature increased, while the wear rate decreased and then increased. The wear mechanism of the coating changed from abrasive wear, adhesive wear and oxidative wear to oxidative wear and three-body wear. Apart from an elevation in wear rate with increasing load, the mean friction coefficient of the coating hardly changed at 500 °C. Due to the coating's transition from adhesive wear and oxidative wear to three-body wear and abrasive wear, the underlying wear mechanism also shifted.

摘要

采用激光熔覆技术在1Cr11Ni耐热钢基体上制备了宏观形貌良好、微观结构均匀的FeCrSiNiCoC涂层。该涂层由树枝状γ-Fe和共晶Fe-Cr金属间化合物组成，平均显微硬度为467 HV±22.6 HV。在200 N载荷下,涂层的平均摩擦系数随温度升高而下降，磨损率先降低后升高。涂层的磨损机制由磨粒磨损、粘着磨损和氧化磨损转变为氧化磨损和三体磨损。在500℃时，除了磨损率随载荷增加而升高外，涂层的平均摩擦系数几乎不变。由于涂层从粘着磨损和氧化磨损转变为三体磨损和磨粒磨损，其潜在的磨损机制也发生了转变。