NOW We're Cook'n with Argon!!

well the holiday break has finally afforded me the chance to abandon my wife and kids and spend a little quality time in the garage a little cleaning a bit more maho mil conversion work and surprisingly some 3d printing no camera no clothes just let my hair down cue up some podcasts and watch the dog chew stuffed pieces this is a little tooling wreck not officially storage maybe but i thought a little tooling a caddy might be handy something maybe to set up often use tools this little sucker believe it or not took 27 hours to print that seemed absurd to me and led me down the rabbit hole of nozzle sizes this one was done with a 0.4 millimeter the only bigger nozzle i have is 0.6 which is in the machine now and printing a 2x3 version of this [Music] the o6 nozzle took the print time down to nine hours granted the new print is a little bit smaller two-thirds i guess the size of this one but according to the slicer anyway this print would have taken about 16 which is a lot but half the print time i put into this one long story short i may just order a one millimeter nozzle do those exist i think those exist i'm starting to wonder if i dream that up now i'll admit it swapping nozzles was a little scary but not too bad knowing me i'll get much too comfortable doing it and break something sooner than later speaking of which you know what someone should do not me mind you but someone make a rotating nozzle head you know like the optics selector you used to use on that microscope at bible camp i bet you can fit three nozzles on that sure you might lose half inch of print height but just think how convenient that could be but 3d printing isn't why i gathered you all here today some of you might remember this the hot shot 360 easy bake oven i got not too long ago and it's been doing great haven't used it a ton but when you need it it's super handy to have it really only has one problem if you could even call it a problem but it's something i hope to address today stan the guy who makes and sells these ships the darn things with air inside air in a heat treat oven what is this world coming and if that weren't bad enough the air in here is dead industrial and so austere but if i'm being honest and just between us it's not so much the air that i take issue with but the oxygen little known fact since about 1985 the fda requires for air to actually be called and sold as air that it contained at least 21 oxygen oxygen in the air might be all well and good if all you want to do is breathe but if you set your sights just a smidge higher and want to heat treat well that oxygen can cause problems specifically oxygen well oxidizes your parts sounds a bit circular i know but science short story shorter an oxygen-rich environment at the temperatures this oven can reach causes parts to get all scaly and crispy looking and that crunchy tasty crust is often extremely difficult to remove if i can dig it up i'll insert some video of quenched parts right out of this oven to show you what i mean you see that how gross those parts are no one wants parts like that usually after heat treatment it's part and parcel the process to just clean scrub wire brush sand grind or do whatever to get them clean again acid baths and pickling maybe stuff like that there are though tricks to help minimize this sort of inconvenience some people like to dip their parts in a chemical batter that keeps the oxygen away some put wood chips or paper in there anything that might burn in an attempt to capture the souls of the oxygen molecules before they can get to the red hot steel surface but my internet friends there's a third option this past summer i may or may not have attended an event where i may or may not have purchased an argon kit to retrofit to the oven this may or may not be said to kit also got a noga pen for you know writing on your indicators and stuff i'm not exactly sure what this is but i think it's a noga maybe a manual nose and ear hair trimmer and a six inch windy hill foundry square cast iron made in the good old u.s of a mississippi seems to be exceedingly well made no voids or defects i'll be honest i checked this with my machinist squares it's not that good frankly it's a bit rough i think i might put this on the mill clean it up a bit maybe grind it in but other than that it's pretty darn cool hey the 3d print finished looks pretty good except my 3d printer ran out of ink that's all that was left sticking out of the hot end so now the caddy's about an inch too short now i wasn't around when that happened i came out here just to find the 3d printer beeping its little heart out i think you could just stick more filament in when that happens if you catch it in time i think first time this has happened to me but what i did was print these little two-tone wing tips i'll just have to glue to the bottom that seems to fit pretty good i know it looks kind of sharp miracle of miracles and unlike ralph hinckley i managed to find the instructions it appears we only really need to drill some holes well one hole let's get this installed and then we'll talk about it and more importantly we'll try it out [Music] dang stan what is this thing made out of the instructions say to use a drill stop and only drill a quarter inch deep but i don't have a drill stop for 11 30 seconds bit in fact i don't have any drill stops so i set the drill to bottom out on the one two three blocks when i'm a quarter inch in are all my drills dull i am positive that that is only a quarter of an inch deep i used another piece of insulation just to keep the good insulation from breaking out when the drill came through not sure if i went deep enough with that tap the instructions say one-third engagement that's how you go from not enough to too much why does that look so crooked i don't know let's see how this thing fits all right i think we're done that was pretty easy now hold on we're only like three lines in stan i really like how you capitalize all the warnings to make sure all the holes and taps are square just to make us feel bad for putting it in crooked next up is this flow meter bracket you can never get this film off laser-cut parts how's that look from there i wonder if this was supposed to go to the other set of screws i've temporarily plumbed the oven to the second tap on the argon for the tig welder long term i plan to run the oven on nitrogen for reasons that remain a mystery i have quite a few bottles around that are more than half full that i can't use anymore but i have no way to regulate their pressure so for today argon it is that gas then comes down into the bottom of stan's flow regulator it's pushed in i assume by this fan and out the top and into the oven chamber inside the oven it's diffused by that tube we installed earlier it's inconel should be able to handle the temperature it's capped on the bottom and has four jets coming out the sides it doesn't rotate i'm doing that from the top with my hand step number b is now try this out and in order to do that we'll need a part to heat treat which i don't have so let's make something try as i might i just couldn't get those lousy chips to break usually you can mess with feed rate or depth of cut by the time they started behaving well the part was mostly done [Applause] that setup moved on me that's no good [Music] i'm starting to get the feeling i picked wow [Music] i'm starting to get the feeling i picked the wrong material this i think is 4140 but i don't have any pre-hardened stock on hand unless my inserts are dull is that possible standing it up like this shouldn't have been a problem or shouldn't be a problem i mean it is kind of a weird setup it's pretty tall smart way to do it probably be lay it down and cut that 10 degree face in so more of the thing is in the vise but i would have had to stand it up for this next step anyway so i just thought i'd do it all in one shot i'm making a fly cutter by the way i don't know if i already said that out loud so what do you think pretty alright for a fly cutter huh though i do have a confession to make there was a little foul play involved i snuck in a little part change when you looked away this is the part we started making and somewhere along the way it turned into this the original is mystery hardened scrapbinium this is known annealed material there was no way i was going to get these features cut into this part in that tragically amateur setup on the mill many years of wisdom told me i'd break a lot of small end mills so i started over not that there was much work in this but still bruised the ego a little bit anyway a fly cutter i know i rushed through this a bit and i often get complaints that i don't show enough machining anymore but if i started to listen to everything my viewers asked for well let's just say that's a slippery slope to go down i'm more than happy to oblige the more reasonable requests but in this particular case we already built a fly cutter so go back to that video if you want details the other one we made in that video had a different arbor on the back and will not fit the new maho milling machine this is just cylindrical shank so i can use it anywhere heck this might even fit my cordless drill and second frankly fly cutters don't need to be heat treated in fact it's probably a bad idea to do so a fella might even go so far as to use the word dangerous mild steel cold rolled if you want to make your own those are just fine i just figured if i tested the oven with just a chunk of whatever that wouldn't be as exciting to see not to mention it would have been a lot harder to make the rabbit butt joke so i'm going to heat treat this strictly to test the argon purge and then i'll temper it back probably a lot according to the destructions stan suggests four to six cfh for the 360. so i guess we'll set that to i don't know five particular tool steel i'm working with wants to go directly into a heated oven so i'm going to start that now it'll probably take more time for the argon to push all the air out of this than it will for this to get the temperature i'm also going to add a screw to the back and some high temperature wire just so i have something to hold on to when i'm quenching here goes nothing you know when i was a kid my grandmother used to always tell me argon is heavier than air the old lady was right make sure you do your argon purge on a sturdy bench i don't have two cameras please bear with me i'm about to pull the part from the oven holy smokes this thing is hot hold on i should probably use some pliers hopefully this wire doesn't snap i can already tell the parts a lot cleaner usually it's got a lot more of that skill hanging off of it when it comes out of the oven moment of truth i suppose this thing is probably still pretty hot if all went well that's coming off very easy there's still some on there let me go scrub this with just some soap and water usually i'd take this right over to the wire wheel but let me get all this oily gunk off of here there it is there's still some scale on there again this was just some dish soap and warm water a little nylon brush a lot of it came right off just sort of washed right away some of that deep surface scaling is still on there i'm gonna go hit this on the wire wheel and see how easily that comes off that came off a lot easier there's still some on there though to be completely honest i don't really know what to expect i mean the descaling has certainly put up a lot less of a fight than it did without the argon purge i'm sure there's some experimenting i could do with times and flow rates and all that stuff but i think i'm pretty happy with that all right one more time this is after a brief encounter with a scotch brite wheel the red or brown or whatever they are they're really mean ones it's a thin wheel and i use it to clean out the slot so the high speed steel would fit back in there but the thin wheels are hard to sort of control pressure on but i didn't really go nuts there are still some places with some very tenacious surface oxide on there again a lot less than it would have been without the argon purge i still want to temper this back a little bit but in the essence of time i might just throw it in the middle and try it out oh this would also want to be cylindrically ground which i can't do it shouldn't be a big deal here for a fly cutter but if this were any other tool except the fly cutter you'd probably want the shank nice ground and cylindrical you also wouldn't want to put this in an end mill holder i'm going to put this in a collet call it will have some give to clamp onto whatever diameter this ends up being after heat treat let me prep some high speed steel and i'll meet you over at the maho [Applause] [Applause] okay so i could have polished that tool bit just a little bit more but that's not what this video is about is it let's head back to the bench it's finally everyone's favorite part of the show the end shooting you straight first impressions are positive i need more time with this the argonne upgrade i mean full with times and flow rates try it with different tool steels so far i only have a data point of one seem to work well but i need a little more time with it also i can't imagine there'll be much difference when i switch to nitrogen but i'll keep you posted speaking of noble gases they're only noble on paper be mindful of pumping your small garage full of inner gas lest you wake up dead if you start feeling drowsy and you're anything like me your first instinct might be to stop drop and roll but don't that's where the argon is well i think that's all i've got thanks for watching and as always stay well ventilated my friends [Music] [Music] [Music] [Music] you

Channel: This Old Tony

Views: 581,515

Rating: 4.9660978 out of 5

Keywords: hotshot, hotshot360, heat treating, heat treat oven, argon, inert gas, 3d printing, rabbit

Id: O_Fo7mfZg7k

Length: 19min 58sec (1198 seconds)

Published: Sun Jan 10 2021

Reddit Comments

[u/RangerNS]

More accurate to say "heat treating without oxygen"

[u/20pennySpike]

As an old school punk fan, when he made the Leatherface reference my heart swelled and tear ran down my cheek.

[u/danmartin6031]

Is nitrogen just as good as argon for heat treating?

[u/chobbes]

The absolute #1 metalworking content creator on YouTube. Informative, entertaining, funny, well-shot, well-edited, good audio, good personality, everything. Tony is the king.

[u/Blamore]

oooor until they look like this! in extremely chef john voice

[u/Downvotes_dumbasses]

Any day Tony releases a new video is a good day.

[u/Guysmiley777]

TL;DW summary: TOT rigs up his heat treating oven with argon to reduce the amount of oxidized nasty crust on treated parts.