Graphite Flotation
Graphite Flotation
(OP)
I need some technical help; I have a situation where I need to take decision on a casting with graphite flotation. So I would like to know if you have some information (an equation or something) to correlate mechanical properties and graphite flotation (from micro-structure), so that I can predict the drop in mechanical properties (roughly). I am looking for some kind of equation or empirical formula (if any) to correlate between micro-structure of the graphite flotation area to mechanical properties. The graphite flotation area was not cleaned even after machining. Or at least if you can share some literature(links) it would be or great help.





RE: Graphite Flotation
Learn the rules,so you know how to break them properly.
Dalai Lama
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RE: Graphite Flotation
In my experience this phenomenon does not cause a loss of mechanical properties and hence the fatigue resistance should not be affected.
The effect is routinely observed by NDE inspectors who find that ultrasonic signals are highly attenuated in the zone containing excess nodules.
Finding literature describing the effect may prove difficult.
RE: Graphite Flotation
Thanks for the answer but its not for gear, its for wind systems. And in the past we have experienced some failures due to graphite flotation in the components. But I was trying to see if there are any equations to correlate the graphite flotation to mechanical properties.
RE: Graphite Flotation
You can predict whether graphite flotation has occurred in nodular irons by using an equation. With proper process control graphite flotation should not occur. It is not possible to use an equation to correlate graphite flotation to mechanical properties due to the metallurgy of the alloy.
RE: Graphite Flotation