the block is 13 in. X 11 in. X 2 in. it has numerous holes and water lines drilled. We wrap in SS foil and double fold the seams. The part was lain flat on 1/2" dia SS rods so there is good air circulation. We have been doing our heat treat this way for years and can usually get S7 to about 61...
1375 pre-heat for 15 minutes, 1750 degrees, 1 hour at peak heat, quenched by fan and Pressurized air hoses.
We have a warped block, if we re-heat it, can we get rid of the warp?
What is the most likely cause of warping? Is the warping due to quenching from a high heat? Or could it be residual stress in the steel?
How would we go about reversing the warping effect, Can we re-heat treat without annealing first?
When the block was removed from high heat, the front of...
Just trying to speed things up. The pieces weigh about 40 lbs and it takes a couple hours to cool without using a fan We always temper twice. We are shooting for 55RC. Thanks for your opinions. Ken
