Steal wear factor

[JeanMicheling]

Hello,

I'm designing a big plain bearing with steal Scandia 400. I was wondering if someone has an idea of the wear factor of this steal or something close.

Thanks for your help,

 

[Cockroach]

0.2 is the standard friction factor, dry steel on steel.

Kenneth J Hueston, PEng
Principal
Sturni-Hueston Engineering Inc
Edmonton, Alberta Canada

 

[FACS]

Stealing is against the law.....

Charlie

http://www.facsco.com

 

[JeanMicheling]

Sorry, maybe I haven't been clear enough. By Wear factor, I meant the value of K in the equations for calculating the wear in a rotating-pin with boundary lubrication. Usually it's around (5 to 200)*10e-10. FACS, sorry for the mistake, steel is stronger than steal.

 

[unclesyd]

if I'm not mistaken Hardox 400 is the same as Scandia 400 so you might contact the Hardox people.

http://www.hardox.com/templates/Page.aspx?id=499

I have data on over 250 materials concerning galling and wear(Taber) with not even a mention of an "AR" material.

 

[Cockroach]

Yeah, I would imagine wear would correlate to friction. But if you're talking e^-10, then this is perhaps a constant particular to the model, it is very small.

What are the dimensions associated with "wear coefficient"? Probably a scalar multiple, i.e. no dimensions?

Kenneth J Hueston, PEng
Principal
Sturni-Hueston Engineering Inc
Edmonton, Alberta Canada

 

[JeanMicheling]

Ok so I talked to the hardox people. Here is what I asked :

Hello Magnus,



As discussed, here are the information on my application :



-It’s the same principle as a plain bearing. It’s a rotating pin with boundary-lubrication. A circular hardox 400 plate oscillates against another circular hardox 400 plate. The equation for calculating the absolute wear life is : t = pi*L*D*w/4*f1*f2*K*V*F where



t : life in hours

L: length

D : Diameter

w : wear

f1 : Motion-related factor

f2 : Environmental factor

K : Wear factor in/((psi)(ft/min)h)

V : linear speed

F : load



I’d like to know the wear factor K for the Hardox 400.


________________________


This formula comes from ''Mechanical Engineering Design'' by Shigley and Mischke. They provide some values for the Oiles, Polyactal, 66 Nylon, Phenol,...etc, but nothing in relation with steel. The only thing Hardox have about the wear is the Relative Wear Method. By comparing the material hardness, they can forecast what will be the hardox plate wear relative to other steels. Thus, assuming I can find the K factor for any kind of steel, a good approx. could be done. Does someone have any value for a well known steel? I can't believe I'm the first person in the world who want to know how long a homemade plane bearing with steel will last! According to Hardox, it seems to be.

Any help will be appreciate.

Thanks,