Thank you Ishvaaag and Beamer for your inputs.
I think Heating high Carbon steel will embrittle it making it more susceptible to future problems.
Cold working would probably also not do as the rails are very heavy .
Merry Christmas
A huge coal stacker reclaimer on rails had foundation embankment settlement. We are going to remediate the foundations. The owner wants the rails to be salvaged but they have been bent out of tolerance. Is there a practical way of straigthening heavy rails?