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Oscillating Laser Post-Processing of NiCrCoFeCBSi/WC Thermally Sprayed Coatings

التفاصيل البيبلوغرافية
العنوان: Oscillating Laser Post-Processing of NiCrCoFeCBSi/WC Thermally Sprayed Coatings
المؤلفون: Olegas Černašėjus, Jelena Škamat, Živilė Čepukė, Gulnara Zhetessova, Tatyana Nikonova, Olga Zharkevich, Nikolaj Višniakov, Alexandra Berg
المصدر: Materials, Vol 15, Iss 22, p 8041 (2022)
بيانات النشر: MDPI AG, 2022.
سنة النشر: 2022
المجموعة: LCC:Technology
LCC:Electrical engineering. Electronics. Nuclear engineering
LCC:Engineering (General). Civil engineering (General)
LCC:Microscopy
LCC:Descriptive and experimental mechanics
مصطلحات موضوعية: NiCrCoFeCBSi/WC coatings, oscillating laser, thermal spray, microstructure, hardness, tribology, Technology, Electrical engineering. Electronics. Nuclear engineering, TK1-9971, Engineering (General). Civil engineering (General), TA1-2040, Microscopy, QH201-278.5, Descriptive and experimental mechanics, QC120-168.85
الوصف: In the present experimental study, the transverse oscillating laser beam technique was applied for the post-melting of metal matrix composite coatings, thermally sprayed with nickel-based self-fluxing NiCrCoFeCBSi alloy and 40 wt.% WC, to improve their hardness and wear resistance. The study was conducted using the single module optical fiber laser at 300 W power, >9554 W/cm2 power density, 250–1000 mm/min laser speed, 1 mm and 2 mm transverse oscillation amplitude. Scanning electron microscopy, energy dispersive spectroscopy, Knop hardness measurements, and “Ball-on-disc” dry sliding tests were conducted to study the effect of the processing parameters on the molten pool geometry and microstructure, hardness, and tribology of the processed layers. Oscillating laser processing with an amplitude of 1 mm, 250–750 mm/min laser operating speed, and sample preheating to 400 °C gave a satisfactory result: wide and shallow molten pools of ~200–350 μm in depth, hardness between ~1100 and 1200 HV0.2 and minimum cracks obtained. The coatings obtained with laser beam oscillation and preheating, and ~1150 HV0.2 hardness showed an improvement in the wear resistance and friction coefficient (~0.33) of ~2.9 times and ~20%, respectively, compared with the respective values of the coatings remelted in furnace.
نوع الوثيقة: article
وصف الملف: electronic resource
اللغة: English
تدمد: 1996-1944
Relation: https://www.mdpi.com/1996-1944/15/22/8041; https://doaj.org/toc/1996-1944
DOI: 10.3390/ma15228041
URL الوصول: https://doaj.org/article/cab7b3ebcf024687af7ca59839ebbf0e
رقم الأكسشن: edsdoj.b7b3ebcf024687af7ca59839ebbf0e
قاعدة البيانات: Directory of Open Access Journals
الوصف
تدمد:19961944
DOI:10.3390/ma15228041