dcsipo
Diamond
- Joined
- Oct 13, 2014
- Location
- Baldwin, MD/USA
Question about multiple heat treatment of O1 tool steel
Hi,
I made some parts out of 1/8" and 3/8" thick O1 and the thinner parts did not get fully hard after following the instructions from Hudson steel. High Speed Steel | Tool Steel | O1 | O1 Technical Data
I assume the thinner parts had just enough time to cool a bit before quenching. The 3/8" thick parts got fully hard, 60+RC, while the 1/8" stuff is more like 55RC. My question is, do I really have to anneal O1 before trying to harden again, or just put it through a second heat treat. It is that slow cooling part that really sucks . Maybe raise the temp to 1525F so it is more likely 1500F when quenched. I will try to move faster from kiln to oil. I thought I was fast enough, but steel does not lie.
dee
;-D
Hi,
I made some parts out of 1/8" and 3/8" thick O1 and the thinner parts did not get fully hard after following the instructions from Hudson steel. High Speed Steel | Tool Steel | O1 | O1 Technical Data
I assume the thinner parts had just enough time to cool a bit before quenching. The 3/8" thick parts got fully hard, 60+RC, while the 1/8" stuff is more like 55RC. My question is, do I really have to anneal O1 before trying to harden again, or just put it through a second heat treat. It is that slow cooling part that really sucks . Maybe raise the temp to 1525F so it is more likely 1500F when quenched. I will try to move faster from kiln to oil. I thought I was fast enough, but steel does not lie.
dee
;-D