thetree
Aluminum
- Joined
- Apr 27, 2010
- Location
- mentor, ohio
We have a small CRESS brand toolroom heat treating furnace. When we heat treat A-2, we do it in foil. During the air quench, we simply wait for the glow to leave the bag, then pop it open to let air get to it. On smaller items, we will let them quench in the bag. We are having problems with our black oxide not getting black on items we heat treat in house. If we send it out to our normal vendors, it is not a problem, the stuff gets black as night. When we do it in house, it just turns a greyish color. I would like some suggestions on getting rid of this problem. Thanks in advance