Effect of production methods on tribological characteristics of babbitt coatings

Korobov, Yury; Nevezhin, S. V.; Филиппов, М. А.; Ilyushin, V. V.; Потехин, Б. А.; Gogolev, L. V.

doi:10.3103/s1068366612030063

Cited by 13 publications

(6 citation statements)

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“…O estudo da rugosidade e da espessura de revestimento de camadas de Babbitt é importante para diversas aplicações industriais [17]. De uma maneira geral, pode-se dizer com relação às duas variáveis estudadas neste trabalho que, caso a espessura do revestimento apresente valores muito baixos, ela tende a não conseguir evitar o contato entre as asperezas do substrato e do material colocado em contato com o revestimento, promovendo a elevação do valor do coeficiente de atrito.…”

Section: Espessura E Rugosidade Do Revestimentounclassified

Estudo do comportamento tribológico do par liga Babbitt – aço ABNT 1045 quando variadas a espessura e a rugosidade do revestimento

Ribeiro

Câmara

2020

Matéria (Rio J.)

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RESUMO O Babbitt, também conhecido como metal patente ou metal branco é uma liga macia muito utilizada em mancais de deslizamento que trabalham em contato com aço, e tem como elementos de base estanho ou chumbo, além de compostos intermetálicos formados geralmente por antimônio e cobre. O presente trabalho buscou avaliar a influência dos parâmetros rugosidade e espessura do revestimento no comportamento tribológico da liga quando em contato com o aço ABNT 1045. Foram realizados ensaios tribológicos de pino sobre disco, utilizando pinos de aço ABNT 1045 e corpos de prova de aço revestidos com Babbitt simulando o contato de um eixo sobre um mancal revestido com Babbitt. A rugosidade e a espessura do revestimento foram variadas em três níveis, com o intuito de observar o comportamento em relação ao atrito e ao desgaste com a modificação destas variáveis. Nos ensaios que utilizaram corpos de prova com as menores rugosidades dentro da faixa analisada, ocorreu um aumento de 0,05 ± 0,02 para 0,46 ± 0,06 no coeficiente de atrito quando se elevou a espessura de revestimento de 0,45 ± 0,07 mm para 1,08 ± 0,17 mm. O maior coeficiente de atrito foi observado no ensaio do corpo de prova com maior espessura de revestimento (1,08 ± 0,17 mm) e menor rugosidade (0,47 ± 0,01 mm), o maior desgaste foi registrado no ensaio com o corpo de prova de maiores espessura de revestimento e rugosidade (1,08 ± 0,17 mm e 1,29 ± 0,20 mm, respectivamente) e o menor desgaste e coeficiente de atrito foram obtidos pelo ensaio realizado no corpo de prova com menor rugosidade (0,43 ± 0,03 mm) e espessura de revestimento média (0,45 ± 0,07 mm).

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Section: Espessura E Rugosidade Do Revestimentounclassified

Estudo do comportamento tribológico do par liga Babbitt – aço ABNT 1045 quando variadas a espessura e a rugosidade do revestimento

Ribeiro

Câmara

2020

Matéria (Rio J.)

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“…The matrix was the phase α (copper and antimony solution in Sn matrix), ensuring efficient running-in and also the special surface microrelief, improving the supply of oil to the friction areas and heat removal from them. The hard inclusions of the phase β (SnSb compound) and phase ε (Cu 6 Sn 5 compound) resulted in high wear resistance [2,3]. At real stable manner, the Sn-based solid solution was soft and even melted because of the large amount of friction heat and the furrow would be formed under the action of abrasive wear [11][12][13].…”

Section: Sbmentioning

confidence: 99%

“…Many achievements [1][2][3][4] have shown that there are some disadvantages in the tin-based babbit layer which is formed by pouring, such as volatile chemical composition, phase separation of the process of crystallization and formation of inclusions, leading to "stretching" of the alloy on the shaft. To exclude these disadvantages, gas surfacing and spraying have been successfully applied, in which metal atomization is done by propane-air combustion product or arc [2]. However, these methods as the same as casting always need to hang tin before process, which reduce productivity apparently.…”

Section: Introductionmentioning

confidence: 99%

Structural design and wear properties of TIG arc brazing tin-based babbit to mild steel

Zhou

Zhang

Shi

et al. 2018

High Temperature Materials and Processes

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The tin-based babbit with different layer thickness was bonded to mild steel via TIG arc brazing. The microstructure, microhardness, wear properties and phase formation mechanism near the interface of the arc brazed layer were investigated by the optical microscope (OM), X-ray diffraction (XRD), high temperature friction and wear testing machine (HTFWT), laser scanning confocal microscope (LSCM), electron microscope (SEM) and energy dispersion spectrum (EDS). It can be found that in the arc brazing seam region, the thinner layer made it possible to form larger size SbSn monotectic phase that connected together and some Fe-Sn IMCs were formed near the interface. So that when the layer thickness was 0.5 mm, the microhardness of arc brazing tin-based babbit layer was the largest and the antifriction property was the best. Moreover, on the brazing tin-based babbit interface, Fe elements were transited and diffused from mild steel into the brazing seam region. Element concentration of Fe was high near the steel interface and formed concentration gradient in the liquid metal layer, which was helpful to promote the metallurgical reaction. Phase constituents of the brazed joint interface were Fe, Fe3Sn, FeSn and FeSn2, formed in the metallurgy of Fe from mild steel and the Sn from tin-based babbit.

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“…In the field of thermal spraying, Babbitt coatings are commonly deposited by using flame spraying [12], plasma spraying [13], high velocity oxy-fuel spraying [9] and arc spraying [12]. To date, only a very few studies have paid attention to Sn-Sb-Cu-based Babbitt coatings deposited by means of LPCS and reported the microstructural properties.…”

Section: Introductionmentioning

confidence: 99%

Microstructural Characteristics in Babbitt Coatings Deposited by LPCS

et al. 2020

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Studies have already established that the mechanical properties of Babbitt coatings significantly depend on the microstructural characteristics, such as the amount and distribution of intermetallic compounds dispersed in a soft solid solution matrix. For Sn–Sb–Cu-based Babbitt coatings, the formation of SbSn- and CuSn-based precipitates has a substantial influence on the resulting microhardness and thus determines the maximum load carrying capacity. Thermal spraying of Sn-based Babbitt coatings results in a relatively more refined structure of these precipitates than in common manufacturing processes, such as casting, due to the thermal processing conditions. This study aims to evaluate the effect of the temperature of the propellant gas and substrate temperature on the microstructural characteristics of Sn–Sb–Cu-based Babbitt coatings deposited by low pressure cold spraying (LPCS). The deposits were examined for their phase composition, microhardness and mesoscopic structure. It was found that the coatings were mainly composed of Sb2Sn23, Sb0.49Sn0.51 and Sorosite (CuSn or CuSb0.115Sn0.835), regardless of the substrate temperature or temperature of the propellant gas to be investigated. For a gas temperature above 300 °C, an increased microhardness was observed, which correlates with the appearance of a more homogenous distribution of Sb0.49Sn0.51 dispersed in a soft Sn-rich solid solution matrix.

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Effect of production methods on tribological characteristics of babbitt coatings

Cited by 13 publications

References 1 publication

Estudo do comportamento tribológico do par liga Babbitt – aço ABNT 1045 quando variadas a espessura e a rugosidade do revestimento

Estudo do comportamento tribológico do par liga Babbitt – aço ABNT 1045 quando variadas a espessura e a rugosidade do revestimento

Structural design and wear properties of TIG arc brazing tin-based babbit to mild steel

Microstructural Characteristics in Babbitt Coatings Deposited by LPCS

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