Heat Treating Blades at Home Accurately Aiming for Minimal Scale and Decarburization

[@burettou]

thanks for a great Aussie non nonsense straight up natural video on heat treating and tempering

[@bjornjacobsen2728]

Didn't realize it was Corin and Darwin until the video had started. Just found it when searching for heat treating videos. Good stuff guys!

[@lsubslimed]

Excellent video! This is pretty much the only vid that "I" have seen on youtube that takes everything into consideration when it comes to heat treating a carbon steel blade in a propane forge (with a venturi burner). A lot of vids that I've seen over the years the guys will get the blade screaming yellow hot and note that it's non magnetic then quench lol, not quite seeming to understand the importance of grain size, time, temp, as well as with keeping decarb & scale to a minimum. Anyway great job, and thanks for sharing, I'm just about to install my thermocouple into my forge sometimet his week probably and it'll be nice knowing the actual temperature in there after doin it by eye and magnet for over three years now. Hope you intend to keep making knifemaking vids, I recognize your username so I know I've seen some of your vids before and thought they were good, so keep them coming! :)

[@randylanglois]

Good informative video. I especially liked the part at 5:04 where the guy picks his nose, and then realizes he did it on camera. lol Good stuff.

[@bradgalles7814]

Great video and forge. Thanks for posting

[@pirtekguy]

Thanks for sharing your knowledge

[@corinkayaker]

I actually run the forge up to temp as slow as possible, like over 10 minutes or so so that the forge heat is very very stable during the heat treat. If you go too hot it can take a long time to cool down. To run mine slowly I still use the carburizing flame.

[@jaycharliesmith]

thanks a top video love the temp gauge takes all the guess work away the quench block good idea will have to try that too

[@scottmccarroll2618]

Another great vid Corin really informative straight to the point thanks for sharing

[@utubephil100]

Great video, many thanks for sharing your expertise ! I see that you held the edge of the blade in the quench oil for a while before immersing it completely. Is this to temper it better ? Also how is the temp thermocouple fitted to your forge?

[@bruceprosser8332]

I was curious as to how and where do you have the thermometer installed in your forge? Thank you.

[@kutectar]

thermocouple

[@TheHonchoofAllSpearheads]

he said thermocouple, a form a transducer... means it's digital as you can see and the contact that detects the temperature is highly heat resistant...

[@ianbeswick8557]

Hi..I enjoyed the knife heat treating video. Nice down to earth and the explanation of reducing the oxygen in the kiln was right on. But the picture was dark when you quenched the knife but from what I could tell only the edge side of the knife was quenched ( it wasn't put all in the way in and waggled about). Am I right guessing that would leave the back of the knife softer for strength. was that the intention? Thanks Ian Bswick Victoria BC

[@brutalbrital]

thanks mate invaluable info for a bolke like me regards

[@behemothsuperknife]

Mine doesn't have a air adjust. But it's also a shoer's forge. So that might have something to do with it. Just for pounding metal.

[@rafaelmoral8053]

Excellent idea, very nice, sir. I'm thinking of building this sort of setup, with a thermocouple and firebricks. Do you still recommend it? Would you modify anything? Any recommendations? This setup or an electric oven? There's is the decarburization in the oven, but.... Wich one you'd go for? I'm in serious doubt. Greetings from Brazil and congratulations.

[@leckyman2010]

Another great video, Do you just stick yu thermocouple in the back of the forge from your Multimeter?

[@corinkayaker]

I have done a post on this someplace... I will post the link in the description

[@jessmdevans]

i would like to see the inside parts and mechanics of that forge. i've had a few propane bottles lying around for years, some full, some empties, and i have no other use for them. id like to make one if i could be pointed in the right direction

[@mcldcrg]

Hi mate, could you help with the tuning of my home made burner, what size gas nozzle is ideal in a 1" burner? What gas pressure range do they generally operate in? Is the position of the nozzle in the venturi critical? Cheers.

[@marcgodwin8355]

Hi Can i ask if you coated the blade with carbon (e.g. very rich flame producing carbon smoke) first before heat treating would that help stop the surface oxidisation

[@corinkayaker]

Nothing in life has to be complicated, and the way you do it works... no question, but doing it this way takes out a lot of the risks. I heat treat lots of other peoples blades, and I don't like taking risks with them after they have put in a day or mores work into making them.

[@hardwaylearnt]

Great info! what type of thermometer do you use?

[@br0k3nilluzion]

this looks the exact same one doesnt it? www.amazon.com/gp/product/B007WVCCLK/ref=pd_sbs_328_33?ie=UTF8&pd_rd_i=B007WVCCLK&pd_rd_r=PQZCVEM2KSKDHYBPN9Z4&pd_rd_w=9mHuq&pd_rd_wg=LSV4K&psc=1&refRID=PQZCVEM2KSKDHYBPN9Z4

[@gg-db7sl]

Hi there. Where did you get the values of 850 and 830 degrees from? Was it based on different steel or were you looking for different results?

[@shaunm2208]

Thanks for sharing bud

[@250kent]

thanks much fantastic content.

[@MrFra1ler]

would 1 or 2 min be ok for a knife thats roughly 1/4" on the spine?

[@kennethsteelman6139]

What liquid do you quench the blade in?

[@micdanson88]

What kind of thermometer are you using? I cant find much that measures as hot as I need

[@jrmym2]

They're called thermocouples. You need a K type thermocouple and an instrument that'll read it.

[@micdanson88]

jrmym2 My dad has K type and a reader that plugs into a multimeter, but he said it will melt at that kind of temp. Is he wrong?

[@jrmym2]

micdanson88 A type K thermocouple with a protective stainless steal or ceramic sheath is good to ~1,300° C peak, ~1,000° C sustained.

[@micdanson88]

jrmym2 would clay or something work?

[@jrmym2]

micdanson88 I have no idea.

[@GarfieldGuy]

the motor oil isn't good for quenching steel......I tested myself,I rather risk doing it on wather.....

[@sideswipe147]

Your tempering temperature is a bit low. You want to shoot for about 530f or about 275c. 180 (assuming c) is way low you wouldn't even get a light straw (about 450f/230c) temper from that.

[@MrMawnster]

Of course it depends on the steel sideswipe....but of course, you knew that right? ;)

[@nealraudabaugh7922]

Dude picks his nose @5:00

[@ajhproductions2347]

Ya call that a knoife? THIS is a knoife!