Parametric investigation of pulsed Nd: YAG laser cladding of stellite 6 on stainless steel

Sun, Shoujin; Durandet, Yvonne; Brandt, Milan

doi:10.1016/j.surfcoat.2004.03.058

Cited by 168 publications

(74 citation statements)

References 9 publications

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“…[2][3][4][5][6] Stellites are well-known hardfacing alloys 5,7 widely used in laser cladding because of their excellent overall properties. [8][9][10] Tungsten carbides, with their high hardness, high density, certain amount of plasticity, low coefficient of thermal expansion, and good wettability from molten metals, are one of the most employed reinforcement for coatings requiring wear resistance, hot hardness, and thermal shock resistance. 4,6 Unluckily, tungsten carbides have a high tendency to dissolve into the molten pool during the cladding process due to their low heat of fusion.…”

Section: Introductionmentioning

confidence: 99%

Study of carbide dissolution into the matrix during laser cladding of carbon steel plate with tungsten carbides-stellite powders

Zanzarin

Bengtsson

Molinari

2015

Journal of Laser Applications

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High power diode laser with coaxial powder injection was used to deposit single tracks of cobalt alloys with tungsten carbides on to a carbon steel plate in order to study carbide dissolution in the metallic matrix. Two kinds of cobalt alloy powders (Stellite 12 and Stellite 21) having different content of tungsten and carbon were used. Processing parameters were changed to obtain different cladding conditions, and effect of substrate preheating was evaluated too. Carbides dissolution, measured with image analysis and EDXS analysis, increases with the increase in the laser power. A low carbon and the absence of tungsten in the matrix powder promote carbides dissolution. Substrate preheating also leads to a higher dissolution. Matrix microhardness of the Stellite 21 increases with the increase in carbides dissolution, while matrix microhardness of the Stellite 12 does not change. Hardness of the coatings is slightly influenced by the dissolution phenomena.

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Section: Introductionmentioning

confidence: 99%

Study of carbide dissolution into the matrix during laser cladding of carbon steel plate with tungsten carbides-stellite powders

Zanzarin

Bengtsson

Molinari

2015

Journal of Laser Applications

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“…The generation of dilution layers is inevitable and can result in poor coating properties and hardness. 13 As a solid-state deposition process, SLD has the potential to overcome to these difficulties and disadvantages.…”

Section: Coating Manufacturing and Characteristicsmentioning

confidence: 99%

“…This paper presents experimental results related to the deposition of a C-Co-Cr hardfacing alloy (the commercial name is Stellite-6) onto steel substrates using an innovative process under development at the University of Cambridge and known as supersonic laser deposition (SLD). The vast majority of Stellite-6 deposits are currently manufactured via LC or arc welding; 13,14 however, disadvantages such as a solidified microstructure due to the deposition of molten material are unavoidable. The SLD process has the potential to overcome the drawbacks of current technologies and has already been effectively applied to the deposition of titanium onto steel substrates.…”

Section: Introductionmentioning

confidence: 99%

Hardfacing steel with nanostructured coatings of Stellite-6 by supersonic laser deposition

et al. 2012

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The ability to manufacture coatings is critical to engineering design. Many components require the application of additional layers to enhance mechanical properties and protect against hostile environments. Supersonic laser deposition (SLD) is a novel coating method based on cold spray (CS) principles. In this technique, the deposition velocities can be significantly lower than those required for effective bonding in CS applications. The addition of laser heat energy permits a change in the thermodynamic experience of impacting particles, thereby offering a greater opportunity for efficient bonding at lower velocities as compared with the CS process. The work reported in this paper demonstrates the ability of the SLD process to deliver hardfacing materials to engineering surfaces. Stellite-6 has been deposited on low-carbon steel tubes over a range of process parameters to establish the appropriate target power and traverse speeds for the coating formation. The coating properties and parameters were examined to determine the primary characteristics and grain structure size. Their morphology and performance were studied through optical microscopy, scanning electron microscope (SEM), X-ray diffraction, hardness measurements and wear testing. The results have shown that SLD is capable of depositing layers of Stellite-6, with properties that are superior to those of their conventionally manufactured counterparts.

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“…Las ventajas del mé-todo incluyen una mínima dilución, baja y controlable entrada de calor en el substrato, gran flexibilidad de procesado y reducida distorsión [2 y 3] . Normalmente, para llevar a cabo el proceso se emplean fuentes láser de CO 2 y de Nd:YAG en régimen de funcionamiento continuo, si bien, en los últimos años, se están empleando las nuevas fuentes de diodos (HPDL), disco y fibra de alta potencia, así como lá-seres pulsados, con duraciones de pulso del orden de varios milisegundos [4][5][6] . Comparado con otras técni-cas convencionales de deposición, como, soldadura TIG (Tungsten Inert Gas), proyección por arco de plasma o proyección HVOF (High Velocity Oxygen Fuel), la técnica de plaqueado láser produce cordones O Op pt ti im mi i z za ac ci ió ón n d de el l p pr ro o c ce es so o d de e a ap po o r r t te e d de e r re ec cu ub b r ri im m i ie en nt to os s a an nt ti i--c co or rr ro os si ió ón n d de e S St te el ll li it te e 6 6 p pr ro od du uc ci id do os s m me ed di ia an nt te e p pl la aq qu ue ea ad do o l lá ás se er r ( (• •) ) I. Vicario * , C. Soriano * , C. Sanz * , R. Bayón * y J. Leunda *…”

Section: I In Nt Tr Ro Od Du Uc Cc Ci Ió óN Nunclassified

Optimización del proceso de aporte de recubrimientos anticorrosión de Stellite 6 producidos mediante plaqueado láser

Vicario¹,

Soriano²,

Sanz³

et al. 2009

Rev. metal.

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Palabras clavePlaqueado laser; Corrosión; Stellite 6.O Op pt ti im mi iz za at ti io on n o of f t th he e d de ep po os si it ti io on n p pr ro oc ce es ss s o of f c co or rr ro os si io on n r re es si is st ta an nt t S St te el ll li it te e 6 6 c co oa at ti in ng gs s p pr ro od du uc ce ed d b by y l la as se er r c cl la ad dd di in ng g AbstractLaser cladding is one of the most efficient surface treatment technologies in the industry. It uses a laser heat source to deposit a thin layer of a desired material on a moving substrate, whose properties have to be improved, achieving a metallurgical bonding between them with low heat affected zone and low dilution, compared to other conventional technologies such as PTA, TIG welding or thermal Spraying. In this sense, it is remarkable that there are 3 main application fields for laser cladding technology: restoration or refurbishment of damaged parts, surface coating against corrosion or wear, and rapid prototyping. The present work describes a study of the optimization of the laser cladding of Co based coatings (Diamalloy 4060NS) on medium carbon steel C45 (AISI 1045). After laser treatment, the surface of the substrate material is improved in terms of resistance against corrosion; this is confirmed in the analysis performed afterwards. It is also shown that the corrosion barrier properties have direct correlation with the laser cladding variables.

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Parametric investigation of pulsed Nd: YAG laser cladding of stellite 6 on stainless steel

Cited by 168 publications

References 9 publications

Study of carbide dissolution into the matrix during laser cladding of carbon steel plate with tungsten carbides-stellite powders

Study of carbide dissolution into the matrix during laser cladding of carbon steel plate with tungsten carbides-stellite powders

Hardfacing steel with nanostructured coatings of Stellite-6 by supersonic laser deposition

Optimización del proceso de aporte de recubrimientos anticorrosión de Stellite 6 producidos mediante plaqueado láser

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