CruForgeV heat treat and quench oil?

S

shqxk

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Mar 26, 2012
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Here is mine own developed recipe. I would like to hear others opinion :)

Normalizing

1650F for 10 minutes, air cool to black
1600F equalize, air cool to black
1550F equalize, quench in Park50
1450F equalize, air cool to room temp, 2 time

Hardening

1525 soak for 10 minutes, quench in Parks50

Snap temper at 365 for 1 hour follow by 2 times tempers at 400 for 1 hour each.

I'm not sure if Park50 is too fast or not? will heated vegetable oil do it? Thank
 
I love CFV! It has a tendency to have massive decarb if no protection is used, so I throw on a very thin wash of satanite during the thermal cycles. Your temps look really good. But there is no reason at all to quench in Parks 50 during your normalizing....only if you were to go to spheroidized annealing would you quench before annealing. Just air cool only. I usually only use three cycles, like 1650 1550 1450, then harden, but one or two more won't hurt at all.

I would actually suggest lowering the austenitizing temperature down to 1475 and hold there for 10 minutes. I am still in talks with known metallurgists about handling hypereutectoid carbide steels (other than 52100), and the best way to normalize and harden them. From what I gather, after we have set up our carbides, distributed them, everything is even and small, we only want to put about .8% of the carbon in solution, and that is accomplished with a hardening heat of 1475F. Any higher (after your normalizing set up) and you are putting too much carbon in solution....too much RA. If one did NOT do the normalizing routine that you are doing, I would say pick 1525F as the hardening temp. Since you ARE normalizing at the proper temps (1650 then stepping down)...stick at with 1475 for 10 minutes.

As far as the quench medium...I use Parks 50. I do NOT believe the steel needs an oil that fast. I think warm canola might just be the ticket, or a commercial oil that isn't as fast as P50. Tempering temps are right on the money, too.
 
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