Mild Steel Rolling/Surface Fatigue
Mild Steel Rolling/Surface Fatigue
(OP)
Hi Group -
I'm trying to predict rolling fatigue life for cast low carbon steel of about 165 BHN, and at relatively low cycles (~10^5). Most of the work I've found on the subject of rolling fatigue seems to be oriented towards bearing design, with a sprinkling of work on cams and gears, so all the test data and contact life models I've found are more relevent to surface conditions of 450 BHN+, and much higher cycles (10^8+). Some work has been done for railway & crane wheel/rail design - materials are closer, but my application (wheeled vertical spillway gate) is much higher loading & lower cycles.
I've done a fair bit of literature review but haven't come up with much (Tallian, Lundberg/Palmgren, a few handbooks on the subject, AGMA standards, etc.) Just wondering if anyone might have an idea or two about how to approach this...
David G.
Vancouver, BC
I'm trying to predict rolling fatigue life for cast low carbon steel of about 165 BHN, and at relatively low cycles (~10^5). Most of the work I've found on the subject of rolling fatigue seems to be oriented towards bearing design, with a sprinkling of work on cams and gears, so all the test data and contact life models I've found are more relevent to surface conditions of 450 BHN+, and much higher cycles (10^8+). Some work has been done for railway & crane wheel/rail design - materials are closer, but my application (wheeled vertical spillway gate) is much higher loading & lower cycles.
I've done a fair bit of literature review but haven't come up with much (Tallian, Lundberg/Palmgren, a few handbooks on the subject, AGMA standards, etc.) Just wondering if anyone might have an idea or two about how to approach this...
David G.
Vancouver, BC





RE: Mild Steel Rolling/Surface Fatigue
RE: Mild Steel Rolling/Surface Fatigue
RE: Mild Steel Rolling/Surface Fatigue
Can you get dissimilar materials and some form of lube in there?
RE: Mild Steel Rolling/Surface Fatigue
RE: Mild Steel Rolling/Surface Fatigue
Tmoose, the wheel path is actually about 230+ BHN, so there seems to be a good difference between the two contact surfaces. So, further hardening of the wheels would make the two surfaces even more similar, which might not really be an improvement. Lubrication is problematic, mainly because the location is within a fish-bearing waterway.
RE: Mild Steel Rolling/Surface Fatigue
As near as I can tell playing with hardness to get for longer life is betting dollars to win pennies compared to lubrication.
Some plastics think water is lube.
RE: Mild Steel Rolling/Surface Fatigue
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