Amount an type of quenching oil

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Jun 13, 2013
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Amount AND type of quenching oil:

No I am not getting Parks for what I am doing. No I am not going back and searching the FAQs again. I have read quite a few and still haven't found out how much oil to use. No, I'm not going to go find a blade smith around me and talk to him about what to do. I'm doing this today. Also, I have talked to a blacksmith/friend and his recommendations were terrible at best. Pretty sure his knives are like peanut brittle.

Please just tell me an answer to my question.

Here's the question.

1. I am heat treating a very very thin stock 1080 blade. I have canola oil and I have one gallon of used synthetic car oil. Do I..

A. Use just the one gallon of synthetic car oil
B. Use the gallon of synthetic car oil and some canola oil
C. Use all canola oil
D. There is a better readily available locally, cheap oil that will quench 1080 better and it is called _______.

End of test. Thank you. I want to heat treat today. I have been putting it off and researching way too many indepth FAQs that talk more about what quenching is. Which makes it hard to find thebasic answers like how much and what type. Yes, I've read all of those a while back. Just need some simple answers. Last time I asked these questions I was recommended to talk to someone locally or read the FAQs. Did that, still have no answers. Please just a simple answer.
 
Last edited:
Haha. You seem pretty set on things, but I get where you're coming from.

Just use the gallon of canola. Stay away from used motor oil or other home goop recipes. Two gallons of oil is better, but for a low-mass blade, 1 will probably suffice. Yes, formulated quench oils are better and yield more consistent and maximal results, but for a thin cross section, canola will cool it plenty fast enough. Make sure to agitate the blade tip-butt or edge-spine in the oil to help break up the vapor jacket and cool faster especially if you're fully quenching.

--nathan
 
The minimum oil volume is one gallon. Two gallons is far better. The tanks should be 3-4" deeper than the blade length ( tang to tip) and at least 4" wide. Quench the whole blade under the oil or it may/will flare up. Keep it under for at least 10 seconds. Move the blade up and down and/or in a cutting motion, but never from side to side.

Use canola or a commercial quenchant...not motor oil. Warm it to 120-130F.
 
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