i was working with 1/16 and 3/32 material. here is the reference on shorter temper times.
http://www.hypefreeblades.com/forum/viewtopic.php?f=4&t=640&p=5335&hilit=80crv2#p5335
Roman Landes » Mon Jul 29, 2013 2:42 am
800°C with a holding time of around 5-8 minutes does not create retained austenite in a 0,8C steel.
It will create fine austenite ad thus fine martensite after oil quench in an section smaller or equal to 5mm max.
so the only thing you need to do is to temper the virgin martensite after the quench.
This would be finished after a few minutes in a preconditioned cline.
But, I would make the few minutes a half an h. to be sure all, even the thicker crossections, have reached the tempering temp. of 180-200°C.
The thing to watch with a plain carbon steel like 1080 is the grain growth, since it has nothing in it to prevent grain growth at higher temps or longer soak times.
So prolonged soak times or high aus temps will need to be watched.
I used 2 15 minute quenches and had good results.