Development of hardfacing material in Fe-Cr-Nb-C system for use under highly abrasive conditions

Scandella, Fabrice; Scandella, R.

doi:10.1179/026708304225011234

Cited by 29 publications

(15 citation statements)

References 6 publications

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“…These microstructural differences, in turn, have an important effect upon weld metal cracking susceptibility and wear properties. [4] However, prediction of these effects upon wear properties is one of the problems to consider during any hardfacing alloy development.…”

Section: A Study Of Alloy Solidificationmentioning

confidence: 99%

“…In general, if there is a uniform distribution of these carbides, and if they are closely spaced, abrasives cannot effectively penetrate into the matrix phase, leading to higher wear resistance and toughness. [4] The purpose of the present work is to correlate wear resistance with the microstructure of a hardfacing alloy based on the Fe-Cr-C-Nb-V system. This alloy has been developed using thermodynamics and kinetics of solidification, microscopy, microanalysis, hardness measurement, and wear resistance testing, for cladding by an open arc welding technique of components subject to severe abrasive wear.…”

Section: Introductionmentioning

confidence: 99%

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The Relationship between the Microstructure and Abrasive Resistance of a Hardfacing Alloy in the Fe-Cr-C-Nb-V System

Corrêa

Alcântara

Tecco

et al. 2007

Metall Mater Trans A

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The relationship between abrasive wear resistance and microstructure of a hardfacing alloy based on the Fe-Cr-C-Nb-V system was investigated. This material was developed for cladding, by an open arc welding technique, of components subjected to severe abrasive wear. The work undertaken included the solidification study, microstructural characterization, and abrasion testing. Microstructural examinations of hardfaced layer showed that the microstructure of the alloy consisted of a large volume fraction of primary niobium carbides randomly dispersed in a metastable austenitic matrix containing fine M 3 C carbides and ''islands'' of eutectic mixture of c/M 7 C 3 . Energy dispersive X-ray analysis results showed that V preferentially partitioned into the NbC and M 3 C phases. In comparison with the conventional high carbon/high chromium hardfacing alloy with higher hardness, a Fe-Cr-C-Nb-V hardfacing alloy exhibited improved abrasive wear resistance and a microstructure with higher toughness.

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Section: A Study Of Alloy Solidificationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Relationship between the Microstructure and Abrasive Resistance of a Hardfacing Alloy in the Fe-Cr-C-Nb-V System

Corrêa

Alcântara

Tecco

et al. 2007

Metall Mater Trans A

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show abstract

“…These microstructural differences, in turn, have an important effect upon weld metal cracking susceptibility and wear properties 1 . However, to predict these effects upon wear properties and enable the optimization of alloy composition is one of the problems to consider during any hardfacing alloy development.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic simulation as an assistant tool in the development of iron based hardfacing materials

et al. 2007

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A thermodynamic model was used to investigate the solidification of a hardfacing material in Fe-Cr-C-Nb system designated CNO, and developed for cladding components subjected to severe abrasive wear by welding. Microstructural characterization of the alloy showed that the theoretical simulations carried out to predict the amount and volume fraction of the phases using the module Scheil of MT-DATA Software gave very realistic results in the case of the rapid solidification of the hardfacing alloy CNO. The results obtained in this study indicate that the utilization of this tool may provide a good understanding of alloys solidification. As a consequence, it is possible to enable the refinement of alloy composition during the early stages of hardfacing materials development, leading to a decreasing of overall cost and time of manufacturing of hardfacing electrodes.

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“…Os carbonetos de nióbio são encontrados com o formato pequeno e alongados. Este formato também foi observado por SCANDELLA e SCANDELLA [8]; LEITE e MARQUES [14] e GARCIA [5] em ligas com teores de Nb de até 2,5 wt%. Estes revestimentos também apresentam uma mudança na matriz quando comparado com os revestimentos da condição 2 (FeCrC+Ti(1) -FeCrC+Ti(2)), isto é devido à adição de novos elementos metálicos, numa proporção maior que 7% wt, tais como Nb, e o aumento no teor de C, Cr e Si.…”

Section: Figuraunclassified

Aplicação de revestimento duro utilizando o processo FCAW duplo arame para diferentes tipos de consumíveis utilizados na indústria sucroalcooleira

Souza

Ferraresi

2017

Matéria (Rio J.)

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A aplicação de revestimentos com o objetivo de reduzir o desgaste em equipamentos e, consequentemente os custos de manutenção, busca obter o incremento da vida em serviço e redução das paradas programadas. Uma correta seleção do material depositado permite, dentre outras coisas, transformar elementos descartáveis por desgaste em bens de capital recuperável, aumentar a resistência e prover as superfícies susceptíveis ao desgaste de características e propriedades desejadas e, em geral, aumentar a eficiência do processo. Assim, o objetivo deste trabalho é avaliar a resistência ao desgaste abrasivo de revestimentos duros depositados em camada única através do processo de soldagem FCAW (Flux -Cored Arc Welding) Duplo Arame, com arame tubular auto protegido. Foram utilizados três tipos de consumíveis aplicados nos revestimentos de martelos e facas picadoras da indústria sucroalcooleira (FeCrC, FeCrC+Ti e FeCrC+Nb) de diâmetro 1,6 mm em doze condições de revestimento diferentes. O revestimento por soldagem foi aplicado sobre uma chapa de aço carbono SAE 1020 com e sem amanteigamento de liga E308LSi, utilizando-se o modo de transferência metálica por curto-circuito. Construíram-se corpos de prova para a avaliação do desgaste em laboratório com abrasômetro Roda de Borracha de acordo com a norma ASTM G65-00. A avaliação de desgaste foi feita via perda de massa. Foram realizadas também análise de dureza, microdureza e microestrutura dos revestimentos. Os melhores resultados de resistência ao desgaste foram obtidos com a utilização dos dois arames eletrodo de mesma composição (FeCrC+Ti -FeCrC+Ti). A presença do Ti no revestimento apresentou menor quantidade de trincas e melhor resistência ao desgaste. As condições com amanteigamento não demonstraram bons resultados com relação à resistência ao desgaste dos revestimentos.Palavras-chave: FCAW duplo arame, revestimento duro, arame tubular, resistência ao desgaste. ABSTRACTThe application of hardfacing brings the reduction of the wear and therefore increases service life of components and reducing the maintenance shutdowns. This work aims to study the wear resistance of hardface applied by welding, by using the process FCAW (Flux-Cored Arc Welding) Self-Shield Double Wire. Three types of consumables used in coating hammers and knives of the sugar industry were used. (FeCrC, FeCrC+Ti and FeCrC + Nb) with diameter 1.6 mm in twelve coating conditions. The coating was applied by welding on a steel SAE 1020 with and without E308lSi buttering, with metal transfer mode in short circuit. It was compared the deposits made with each condition. It was constructed specimens for the evaluation of wear in the laboratory with Rubber Wheel according to ASTM G65-00. The wear evaluation was made via mass loss. It was also carried analysis hardness and microhardness of the coating microstructure. The best wear resistance results were obtained with the use of two wires electrode with the same composition (FeCrC + Ti). The presence of Ti in the coating has fewer cracks and improves wear resistance...

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Development of hardfacing material in Fe-Cr-Nb-C system for use under highly abrasive conditions

Cited by 29 publications

References 6 publications

The Relationship between the Microstructure and Abrasive Resistance of a Hardfacing Alloy in the Fe-Cr-C-Nb-V System

The Relationship between the Microstructure and Abrasive Resistance of a Hardfacing Alloy in the Fe-Cr-C-Nb-V System

Thermodynamic simulation as an assistant tool in the development of iron based hardfacing materials

Aplicação de revestimento duro utilizando o processo FCAW duplo arame para diferentes tipos de consumíveis utilizados na indústria sucroalcooleira

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