Effect of Ta on the microstructure and hardness of Stellite 6 coating deposited by low power pulse laser treatments

Farnia, Amirreza; Ghaini, F. Malek; Rao, Jiancun; Ocelík, Václav; Hosson, J.Th.M. De

doi:10.1016/j.surfcoat.2012.10.065

Cited by 35 publications

(5 citation statements)

References 19 publications

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“…Up to now, just a small attention was paid to this promising coating material The CoCrTaAlCSiY is mainly manufactured as a powder for thermal spray coatings. Chromium (23-27 wt%) is responsible for oxidation resistance, presence of tantalum (6.9-9.5 wt%) could lead to formation of tantalum carbides TaC which are harder than carbides Cr3C2 and yttrium content up to 1 wt% within Co-based alloys can cause improvement of tribological behavior [11]. These characteristics stay behind the selection of CoCrTaAlCSiY as a experimental material for wear resistant HVOF coatings of this paper.…”

Section: Introductionmentioning

confidence: 89%

Microstructure, Tribological Behaviour and xrd analysis of HVOF Sprayed and Laser Remelted CoCrTaAlCSiY Coatings

Glanc

Šimůnková

Jansa

et al. 2020

METAL 2020 Conference Proeedings

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Superalloys with cobalt as a base material are widely used among different industry applications. Their main advantages are excellent corrosion and wear resistance. Material CoCrTaAlCSiY was chosen for this study as an unexplored representative of Co-based superalloys with a potential for good tribological behavior. This paper follows the results of previous paper called "Microstructure and Tribological Behavior of HVOF Sprayed and Laser Remelted CoCrTaAlCSiY Coatings". In this paper are also presented three states of HVOF sprayed and post laser treated coatings of CoCrTaAlCSiY (as spray state and two different laser treatments varying in specific energy of laser). Pin-on-disc test was carried out to evaluate wear behavior. XRD analysis was done to reveal phase transformations between FCC and HCP. A positive effect on wear coefficient for both laser treated CoCrTaAlCSiY coatings was proved.

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Section: Introductionmentioning

confidence: 89%

Microstructure, Tribological Behaviour and xrd analysis of HVOF Sprayed and Laser Remelted CoCrTaAlCSiY Coatings

Glanc

Šimůnková

Jansa

et al. 2020

METAL 2020 Conference Proeedings

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“…Because the laser molten pool is a non-equilibrium process, the γ -Co cannot be transformed into -Co in sufficient time at high temperatures. Meanwhile, the FCC range of Co can be stabilised by the presence of Fe, Ni, C and other elements that can reduce the phase transition temperature in the cladding layer, so the FCC range of Co can be stabilised, leading to the FCC structure of γ -Co can be retained to room temperature [22]. The alloy elements such as Cr, W, Fe in dendrite will dissolve in the solid solution formed by Co and Cr and play a solid solution strengthening role.…”

Section: Phase Analysismentioning

confidence: 99%

Laser cladding Co-based coating coupled with electromagnetic/ultrasonic compound energy field

Wang

et al. 2023

Materials Science and Technology

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Co-based coatings were fabricated by laser cladding coupled with electromagnetic/ultrasonic compound energy field. The microstructural evolution and wear resistance were investigated. The experiment results indicate that the number of coarse dendrites is continuously reduced and that of fine grains is gradually increased as the energy field changes from single to compound energy field. The compound energy field makes the cladding layer microstructure more uniform and refined, leading to the cladding layer showing the best wear resistance, in terms of highest microhardness (531.95 Hv0.2), lowest friction coefficient (0.259), minimum wear rate (8.96 × 10−2mm3 (Nm)−1). The solidification structure of cladding layer can be effectively controlled by applying an external physical field in the process of laser cladding with obvious improvements in mechanical properties, especially for the compound energy field.

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“…Stellite 6 alaşımında, Cr, M7C3 ve M23C6 karbürlerin oluşmasıyla birlikte, oksidasyon, aşınma direnci ve mukavemet sağlar. Stellite alaşımlarının güçlendirilmesi için, refrakter elementler (tungsten veya molibden) ile katı eriyik sertleşmesine ve karbür çöktürmesine katkıda bulunurlar [16][17].…”

Section: Eds Analiziunclassified

TIG Yöntemi ile Ostenitik Paslanmaz Çelik Yüzeyine Kaplanan Stellite 6+FeMo Tabakasının Mikroyapı ve Sertlik Özelikleri Üzerine Etkisinin İncelenmesi

Çolak

Turhan²

2018

Bitlis Eren Üniversitesi Fen Bilimleri Dergisi

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Bu çalışmada, AISI 304 östenitik paslanmaz çelik yüzeyi Tungsten Inert Gas (TIG) kaynak yöntemi kullanılarak Stellite 6+FeMo alaşımı ile kaplanmıştır. Kaplanan tabakanın mikro yapısı, optik mikroskop (OM), taramalı elektron mikroskobu (SEM) ile incelenip yoğun enerjili X ışını analizi (EDS) ile analiz edilmiştir. Ayrıca numunelerin sertlik dağılımları mikro ve makro sertlik ölçümleri ile değerlendirilmiştir. Optik mikroskop ve mikroyapı incelemeleri neticesinde, kaplama tabakası ile alt tabakanın birbirlerine bağlandığı, kaplamada FeMo tozu ilavesine bağlı olarak sertlik değerlerinin arttığı ve tane sınırlarında ince taneli dentritik yapıların meydana geldiği tespit edilmiştir. Yüzey kaplama işlemi ile altlık metale göre daha sert ve dolayısıyla dış etkilere karşı daha mukavemetli bir yüzey tabakası elde edilmiştir.

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Effect of Ta on the microstructure and hardness of Stellite 6 coating deposited by low power pulse laser treatments

Cited by 35 publications

References 19 publications

Microstructure, Tribological Behaviour and xrd analysis of HVOF Sprayed and Laser Remelted CoCrTaAlCSiY Coatings

Microstructure, Tribological Behaviour and xrd analysis of HVOF Sprayed and Laser Remelted CoCrTaAlCSiY Coatings

Laser cladding Co-based coating coupled with electromagnetic/ultrasonic compound energy field

TIG Yöntemi ile Ostenitik Paslanmaz Çelik Yüzeyine Kaplanan Stellite 6+FeMo Tabakasının Mikroyapı ve Sertlik Özelikleri Üzerine Etkisinin İncelenmesi

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