I'm currently trying to figure out whether or not we can flame-harden a steel wheel which was supplied with a lower hardness than expected. I'm worried, however, that flame-hardening can either deform the wheel or change its size somehow, especially given that a flame-hardening job has never been done in the company before.
The wheels are about 13" in diameter and about 6" in thick. They have a few metal details and inner holes, which I'm not exceedingly worried about since other wheels on the same machine will have different designs. The wheel will roll on a plate, although I do not know the hardness of the plate at the moment.
Ideally, I would like to flame harden the wheels from 160 Br to 400 Br, to bring it up to the design specifications, although I would be content taking it up to 300 Br, which is the hardness of some previous wheels we have tested from the same machine.
What considerations should I take before attempting to set up the flame-hardening? I have quite a few wheels to spare in case the job goes wrong, but I would also like to know if there is some quantitative analysis that should be done before starting.