Influência Da Temperatura De Austenitização E Do Resfriamento Na Microestrutura Do Ferro Fundido Branco De Alto Cromo Usado Em Chutes De Transferência De Minério De Ferro

Rocha, Diego Loubach da; Martins, Anderson Pereira; Pinto, Flávio Antônio de Morais; Carvalho, Cássio Santos de; Franco, A.

doi:10.5151/1516-392x-274

Cited by 1 publication

(1 citation statement)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The erosive-abrasive wear resistance of the HCCI specimens possessing different amounts of martensite was assessed using an impeller-tumbler tribometer, whose constructive details are shown elsewhere 12,13 . Figure 1 schematically shows the test setup, where up to three specimens, held in slots of the impeller, can be tested.…”

Section: Impeller-tumbler Test Proceduresmentioning

confidence: 99%

Study of the Erosive-abrasive Wear Resistance of Fe-14%Cr-2.8%C High Chromium Cast Iron

Franco Júnior,

Sanchez Caceres,

Rocha

2024

Mat. Res.

View full text Add to dashboard Cite

High chromium cast irons (HCCIs) are widely applied in the mining industry as components of equipment for iron ore transportation, in which their surfaces are subjected to abrasive and erosive wear. The present work evaluated the erosion-abrasion behavior of a HCCI possessing different amounts of austenite and martensite, using a laboratory impeller-tumbler wear test apparatus and iron ore pellets as abrasive material. The results showed that the wear dominant mechanism on the worn surface of the as-cast material depends upon the material microstructure. For HCCI destabilized at 930 and 990 °C, the matrix has high martensite/austenite ratio and finely dispersed secondary carbides, offering high abrasion-erosion wear resistance. The absence of fractured eutectic carbides indicates that such matrix has hardness and load bearing capacity, enough for mitigating a significant plastic deformation during the impact pellets. For HCCI destabilized at 1050 °C, the matrix has a low martensite/austenite ratio and coalesced secondary carbides, leading to high wear rates during erosion-abrasion tests.

show abstract

Section: Impeller-tumbler Test Proceduresmentioning

confidence: 99%