Metal-matrix composite coatings by PTA surfacing

Deuis, R.L.; Yellup, J. M.; Subramanian, C.

doi:10.1016/s0266-3538(97)00131-0

Cited by 152 publications

(83 citation statements)

References 27 publications

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“…São observadas partículas em sua maioria de forma esférica (tamanho de partícula na faixa de 45-105 μm) que são benéficas por possuírem maior capacidade de arraste, maior eficiência de fusão e menor retenção de umidade [21]. Esta morfologia é característica de pós obtidos por atomização a gás.…”

Section: Resultsunclassified

Avaliação do Efeito da Energia de Soldagem na Deposição de Aço Inoxidável Superduplex pelo Processo Plasma Pó

et al. 2015

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Este é um artigo publicado em acesso aberto (Open Access) sob a licença Creative Commons Attribution Non-Commercial, que permite uso, distribuição e reprodução em qualq'uer meio, sem restrições desde que sem fins comerciais e que o trabalho original seja corretamente citado.Recebido: 03 Mar., 2015 Aceito: 29 Jun., 2015 E-mail: nunesbar@ibest.com.br (EBN)Resumo: O processo plasma pó é um dos mais recentes na aplicação de revestimento, possuindo como principal característica o controle da diluição. A soldagem de revestimento com aços inoxidáveis superduplex é uma interessante opção para a construção e o reparo de equipamentos para aplicações em ambiente de corrosão severa, permitindo alcançar as características desejadas:resistência à corrosão e boas propriedades mecânicas. Logo, este trabalho tem como objetivo avaliar o teor de ferrita no metal de solda e as características mecânicas através de perfis de microdureza em soldagens de revestimentos de dutos de aço C-Mn com deposição de UNS S32760 depositadas pelo processo Plasma Pó. Foram realizadas soldagens em dutos com deposição de AISD, empregando três níveis de energia de soldagem, variando a velocidade ou corrente de soldagem. Posteriormente, foi feita a análise de geometria e quantificação do teor de ferrita no metal de solda e levantamento do perfil de microdureza. A variação da energia de soldagem acarretou mudanças na geometria do cordão de solda, sendo que a alteração da corrente de soldagem proporcionou alterações mais significativas. O aumento da energia acarretou na redução do teor de ferrita do metal de solda. Em relação à microdureza, apenas a condição de maior nível de corrente de soldagem apresentou níveis bastante elevados de microdureza no metal de solda. Palavras-chave:Plasma; Superduplex; Revestimento. Evaluation of the Effect of the Heat Input in the Super Stainless Steel Deposition by Powder Plasma ProcessAbstract: The powder plasma process is one of the latest on weld overlay application and it has as main feature getting the dilution control. The weld overlay with the Super Duplex Stainless Steels is an interesting alternative for the construction and repair of equipment for applications in severe corrosive medium corrosion, allowing reach the desirable characteristics: good resistance corrosion and mechanical properties. Soon, the main objective of the present work is to evaluate the ferrite content in the weld metal and mechanical properties through microhardness profile in weld overlay of C-Mn pipes with UNS S32760 deposition by powder plasma process. Three welding energy levels, varying the speed or welding current, had been carried in the pipes with SDSS deposition. Later, it had carried geometry analysis and quantification of ferrite content in the weld metal and microhardness profile survey. The variation of welding current caused changes in the geometry of weld bead, being the change of welding current provided the most significant changes. Higher levels of heat input resulted in the reduction of the ferrite content of the weld meta...

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Section: Resultsunclassified

Avaliação do Efeito da Energia de Soldagem na Deposição de Aço Inoxidável Superduplex pelo Processo Plasma Pó

et al. 2015

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“…Napoiny kompozytowe łączą w sobie właści-wości odpornej na ścieranie i jednocześnie stosunkowo plastycznej osnowy oraz twardej ceramiki. Powłoki kompozytowe otrzymywane są na ogół z proszków technikami napawania plazmowego, laserowego, przetapiania wiązką elektronów bądź natryskiwania termicznego [4,5]. Powłoki kompozytowe uzyskane przez natryskiwanie nie mogą przenosić dużego obciążenia ściernego z powodu mechanicznego charakteru połą-czenia warstwy z materiałem podłoża oraz porowatości obecnej w tych warstwach.…”

Section: Wstępunclassified

Badania porównawcze napawanych plazmowo warstw niklowych z węglikami Ti i Cr

Bober

Senkara

2011

Przegląd Spawalnictwa

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Badania porównawcze napawanych plazmowo warstw niklowych z węglikami ti i crPlasma surfaced nickel layers with chromium and titanium carbides - comparative research Dr inż. Mariusz Bober, prof. dr hab. inż. Jacek Senkara -Politechnika Warszawska. StreszczenieW artykule przedstawiono wyniki badań struktury kompozytowych powłok na osnowie stopu NiSi2B z dodatkiem węglików Ti i Cr, napawanych plazmowo z mieszaniny proszków na podłoża ze stali niskostopowej. Określono udział i rozmieszczenie fazy umacniającej w osnowie. Wykazano, iż odmienny charakter oddziały-wania węglików Ti i Cr z ciekłym stopem Ni wpływa istotnie na proces formowania się napoin kompozytowych oraz na rozmieszczenie i udział cząstek fazy umacniającej w matrycy.

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“…The surface hardening processes can improve tribological, wear and corrosion properties of industrial components working in harsh situations [1][2][3]. Among different welding processes, Plasma Transferred Arc (PTA) is a relatively new method compared to other conventional welding processes such as GTAW and GMAW [3].…”

Section: Introductionmentioning

confidence: 99%

“…Among different welding processes, Plasma Transferred Arc (PTA) is a relatively new method compared to other conventional welding processes such as GTAW and GMAW [3]. In the PTA method, the filler material in the form of powders is carried from the powder holder to the weld pool [4].…”

Section: Introductionmentioning

confidence: 99%

Metallurgical Characterization of a Weld Bead Coating Applied by the PTA Process on the D2 Tool Steel

Tahaei

Vazquez²,

Merlin

et al. 2016

Soldag. insp.

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Abstract:In this investigation, a nickel-base powder mixed with tungsten carbide particles was applied by Plasma Transferred Arc welding (PTA) on the surface of the D2 cold work tool steel to improve surface quality and to extend its lifetime during applications. The Design of Experiment (DoE) method was applied to obtain the appropriate combination of hardfacing parameters and to run the minimum number of tests. Current, travel speed and preheat were considered as variable parameters. These parameters are important to reach a final layer with an appropriate bead geometry accompanied with good metallurgical properties. All samples were prepared for metallurgical investigations and the effect of process parameters on the weld bead geometry was considered. For each experiment run, weld bead geometry parameters were measured including dilution, penetration and reinforcement. Microstructures and the distribution of tungsten carbide particles after welding were analyzed by Optical Microscopy (OM) and Scanning Electron Microscopy (SEM) equipped with an EDS microprobe. In addition, hardness tests were performed to evaluate the mechanical properties of the weld bead layers. Finally, among all the experiments, the best sample with appropriate bead geometry and microstructure was selected.

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Metal-matrix composite coatings by PTA surfacing

Cited by 152 publications

References 27 publications

Avaliação do Efeito da Energia de Soldagem na Deposição de Aço Inoxidável Superduplex pelo Processo Plasma Pó

Avaliação do Efeito da Energia de Soldagem na Deposição de Aço Inoxidável Superduplex pelo Processo Plasma Pó

Badania porównawcze napawanych plazmowo warstw niklowych z węglikami Ti i Cr

Metallurgical Characterization of a Weld Bead Coating Applied by the PTA Process on the D2 Tool Steel

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