metalography methode
Post on 18-Aug-2015
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METALOGRAPHY METHOD(Berdasarkan ERA Tech nology)
Ferrite/Bainite
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Ferrite/Pearlite
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Class / Stadium A B c D E F
Approx.Damage 0% 20% 40% 600/o 80o/o End Of Life
Approx. LifeRemaining 100o/o 80% 60% 40% 20% None
NatureNo Creep Defect,
Ferrite and distincttransformation
product
lncipient Spheroi-disation and
isolated carbidaprecipitation,
notably at grainboundaries
Evident Spheroi.disation of trans-formation productFerrite and trans-formation producteasily distinguish.
able
Full Spheroidisa-tion of transfor.mation product.No significant
carbide precipita.tion within ferrite
grains
Full Spheroidisa-tion. Carbides
evently dispersedthroughout gralns
and at grainboundaries
FullSpheroidisation.
Significantcoalescence
between carides
Action NoneReinspection afterApprox. 100.000service hours
Reinspection afterApprox. 50.000service hours
Reinspection afterApprox.35.000service hours
Reinspectlon afterApprox. 100.000
service hours
Management mustbe inforr,red im-
mediately grindingto determlne crack
depth
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