Thanks for the advice.
Re melting, I was worried about that, hopefully the first water flow diagram would suffice to remove enough heat from the coil?
I have toyed with having two flows for quenching and cooling like you mentioned, unfortunately the wall thickness is already nearing the skin...
I am designing an induction heating rig to heat a strip on the surface of a steel sample with repeated quenching, through holes in the heating surface of the coil (shown in the third image)
Firstly, could anyone comment on the current coil design (split-return rectangular copper pipe)
Secondly...
