elastic module of hardened materials

[Ing.Vedder]

I have to design a wheel and a rail and I thought I would use hertz formulas.
the wheel is hardened superficially induction to achieve a greater hardness of the wheel and not wear.
the rotaia is a simple lardone reclaimed.

now the question:

as the surface of the wheel is hardened, the module of young and the coeff of poisson remain the usual steel (210.000mpa and 0.3) even after the heat treatment? (they are two basic data for calculating tensions according to hertz's tories)


thanks to all for advice

ev

 

[africagia]

I have to design a wheel and a rail and I thought I would use hertz formulas.
the wheel is hardened superficially induction to achieve a greater hardness of the wheel and not wear.
the rotaia is a simple lardone reclaimed.

now the question:

as the surface of the wheel is hardened, the module of young and the coeff of poisson remain the usual steel (210.000mpa and 0.3) even after the heat treatment? (they are two basic data for calculating tensions according to hertz's tories)


thanks to all for advice

ev

Of course! If you can find something that will change the module of young and the coeff. of polka dots of a material let me know, maybe we put ourselves in society! !

 

[Ing.Vedder]

Of course! If you can find something that will change the module of young and the coeff. of polka dots of a material let me know, maybe we put ourselves in society! !

the temperature changes the module of young.
treatments terms do not know, to hear wikipedia (known source of canoscence) the treatment of tempra affects very little.
Now are we going to society? :smile:

 

[zeigs]

from mechanical technology remembrances, the load application speed changes the elastic module