I was experimenting with heat treating last night and had a problem I don't understand. I was using old truck coil spring. It had been flattened to about 3/16. I tried it at different temperatures and quenching in canola and water. Each time after taking off the scale I could use a file and just file away on it, like it was mild steel. I put it in the vise and wacked it and snap it broke. Trying to file 'inside' the steel at the break it was hard as hell. Did it only harden 'inside'?
I had some O1 and took it up to really red and poked it into the water barrel as a quick test. It was hard as hell inside and out.
Is it time for me to give up on free material?
I had some O1 and took it up to really red and poked it into the water barrel as a quick test. It was hard as hell inside and out.
Is it time for me to give up on free material?