Interrupted Quenching

BTW, I failed to mention that the vise jaws are copper. My favored tool on bigger blades is a "turning Fork" that drops in the hardie hole. It is just two parallel pieces of 1/2" round stock that are 3/8" apart. Stick the blade between them and twist or bend as needed. It works great for small warps.

Yes - more than 100%. Tai quenched some of those blades twice.;)

Stacy
 
Last edited:
I will not go into bainite since I find it boring, silly and irrelevant to this conversation.
Click to expand...

Now there's a political statement from our little tin god if ever I saw one :p

That was intended as a joke BTW, just in case my sense of humor is in it's typical bad form tonight.;)

Actually, the reason I am bothering to interrupt this otherwise wonderful rehash of interrupted quenching is to ask about duplex structures. I remember about a year or so ago Jeff Check over at SFI had been experimenting with upquenching 52100 to form controlled combinations of martensite / lower bainite. I don't recall ever seeing any follow up on that issue though. I will be PM'ing him over there but was wondering if anyone here had any input on the potential implications this sort of thing could have for large type blades.

Not that I'm anywhere actually near being able to accomplish this sort of experimenting, but I find it fascinating on a conceptual level as well.
 
Last edited:
Kevin R. Cashen said:
No I am thinking knives, only the tang should go into the vice. If you interrupted high enough a vice will be way too much overkill in straightening any kinks, as I said a gentle nudge is all that is required on a 4" hunter or a 3' sword. If these are your first attempts, trust me, I have done this few more times than you;).
Click to expand...

That easy to straighten, eh. I guess I'm going to just tdo a pretzel test in the morning. How come I never heards of this before? Sure beats 3 pins in a vise.
 
bladsmth said:
BTW, I failed to mention that the vise jaws are copper. My favored tool on bigger blades is a "turning Fork" that drops in the hardie hole. It is just two parallel pieces of 1/2" round stock that are 3/8" apart. Stick the blade between them and twist or bend as needed. It works great for small warps.

Yes - more than 100%. Tai quenched some of those blades twice.;)

Stacy
Click to expand...

That, I am going to make. Possibly in different sizes.
 
bladsmth said:
BTW, I failed to mention that the vise jaws are copper. My favored tool on bigger blades is a "turning Fork" that drops in the hardie hole. It is just two parallel pieces of 1/2" round stock that are 3/8" apart. Stick the blade between them and twist or bend as needed. It works great for small warps.

Yes - more than 100%. Tai quenched some of those blades twice.;)

Stacy
Click to expand...

I'm not into double or triple quenching... ;)

I usually just pad my knee with leather and bend the blade straight over my knee with gloves on while it's still hot. If I can't get it that way, I use a vice, but don't tighten it on the blade. The vice jaws can suck the heat out. I have also used a wooden clamp which doesn’t ding the blade or suck much heat out...

… Some blades I can straighten just with gloves and hand pressure,... and you can also pad the vice jaws with wood or leather.

The only times I've ever gotten serious warpage (back and forth along the edge) was when the blade was too thin. So, quenching again wouldn't have helped...
 
Last edited:
Tai,
You missed my humor. I was saying the only way to get more than 100% is if some were done twice. (that really wouldn't be more than 100% either, but it made for a joke.)
Stacy
 
bladsmth said:
Tai,
You missed my humor. I was saying the only way to get more than 100% is if some were done twice. (that really wouldn't be more than 100% either, but it made for a joke.)
Stacy
Click to expand...

well I got it....
 
Weeeeeeell heck it only stands to reason, if you get 50% martensite on your first quench and 50% on your second one, you'll have 100%, JEEZ come on guys it's basic mathematics!
 
You guys are funny!

What I meant was,... I've done it way more than 100 times in a row successfully. :)

That's how easy it is!... seriously.
 
Last edited:
You must log in or register to reply here.
Back
Top