Wheel tread after quenching hardness of HB600 above, there will be crack at the clean, welding insulation for 12 hours or so, repair welding and then around the cracks and repair the local hardness reduction (HB230 less than)! wheel material is cast steel used in ordinary welding wire
Cracks may or may not be chemical in the heat treatment
There will be crack at the clean, repair welding should be before annealing, and then repair welding, no side around the cracks.
Welding should be divided into several times the welding, each welding with a pointed hammer gently tapping the solder joints to eliminate the weld stress, to be welded after welding to continue welding. This can minimize the impact of heat on other parts of the hardness of welding. In addition, the use of high-carbon electrode.
