Hello
i am upgrading my 25" quench tank to a much bigger 50" tank. I have been using veggie oil with some atf to try to keep the flames down. I have had good results with this combo. I have broken a few blades and found a nice small crystalline structure. But going to the new tank I was thinking about upgrading to a actual proper quench oil. But before I buy 15 gallons of the stuff (not cheep). I was wondering what most folks are using here. I have looked at the stickies under sword, knife and heat treatment they usually just say oil. Now being I work in a refinery I have a little knowledge about oil (very little). The research I have done so far shows a wide spread in viscosity for quenchent oil. I will list below. All will be normalized at 40 deg c /104 deg f. And shown in kinamatic viscosity for reference
10% brine - .85
isodur 160 - 10
isomax 166 - 12.5
chevron 70 - 16.5
isodur 220 - 19
isorapid 227 - 24
hydrolic oil - 30
vegetable oil- 34
trans (atf) - 35.5
isorapid 459 - 49
sae 30 - 88
so I found a great spread on quench fluid viscosity and added some of the other things people seem to quench with. I know quench oil is made from a base oil with a anti- oxidation addictive. I am tempted to stay with the veggie oil as I know it well. The real question is how many folks around here are using quenching oil verses something else. Hopefully I have done enough research on my own so I don't get yelled at for asking questions
Regards
otto