Sgt Heli Veteran Location: Remlap, Al USA
| If you take a shaft and heat to the point its no longer magnetic, then bury it in a bucket of ashes and let it cool very slowly then it will be annealed.
Yes, if you straighten a shaft then it will be slightly longer but there are alot of threads on the King feathering shaft. Anytime you bend and straighten a shaft those molecules have to go somewhere. Its not a one way street however. You can get the steel to shrink with heat and localized quenching.
The difference as I understand it in those two steels:
Hot rolled is just that, shapes that have only been hot rolled. Usually slightly oversized too.
Cold rolled is steel that has been hot rolled and then additionally cold rolled. This does a few things. Closer tolerances, some surface hardening, some rust resistance, and increased toughness I suspect are a few of those things. |