Title

ANÁLISE DE FALHA DE ROLAMENTO DE CONTATO ANGULAR UTILIZADO EM SISTEMA DE EXAUSTÃO

FAILURE ANALYSIS OF ANGULAR CONTACT BEARING USED IN EXHAUST SYSTEM

Authorship

CASTRO, DANILO BORGES VILLARINO DE; GATTI, MARIA CRISTINA ADAMI; SPINELLI, DIRCEU; TARPANI, JOSÉ RICARDO

CASTRO, DANILO BORGES VILLARINO DE

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GATTI, MARIA CRISTINA ADAMI

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SPINELLI, DIRCEU

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TARPANI, JOSÉ RICARDO

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DOI

10.5151/2594-5327-2012-10663-00003

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Abstract

The causes of failure in angular contact ball bearing employed in paper mill exhaust system have been investigated. The following experimental procedures were carried out: visual, dimensional, metallographic, fractographic and inclusion content analyses, besides hardness testing. Is has been concluded that the rolling-element bearing failed by overload in highly localized regions in both the inner and outer races. Contact fatigue developed specially in the inner race as a result of high inclusion concentration in this region. The bluish colored outer ring surface indicated that the local temperature reached the range of 300-350oC.

The causes of failure in angular contact ball bearing employed in paper mill exhaust system have been investigated. The following experimental procedures were carried out: visual, dimensional, metallographic, fractographic and inclusion content analyses, besides hardness testing. Is has been concluded that the rolling-element bearing failed by overload in highly localized regions in both the inner and outer races. Contact fatigue developed specially in the inner race as a result of high inclusion concentration in this region. The bluish colored outer ring surface indicated that the local temperature reached the range of 300-350oC.

Keywords

Rolamento de esferas; Análise de falha; Fadiga por contato.

Ball bearing; Failure analysis; Contact fatigue.