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Looks like it was set to 38KW, industrial rates average 6.04 cents per KW in the US. So about $2.30 per hour in that case for just the heating element.

The electric current in the tongs heats up the metal, to the point that the atoms of the steel are basically able to move about. Immediately quenshing in cold water, sort of shocks the atoms into straight lines, imagine soldiers on parade linking arms. This is the hardest the metal can be, with all the atoms lined up together, but it comes at a cost, it makes the metal brittle but extremely hard wearing.

To add to David's answer heating the metal up the same way and allowing it to slowly cool will make it soft. Also after hardening some parts call for tempering which is a reheating to a lower temperature for a specific time and slower cool to take some of the brittleness out. Heat treating metal is both a science and an art.

I do this for a living but with gas. We heat the metal to a certain temperature and quench it with water or oil. This makes the metal harder, which is measured in rockwell. So for instance, if you have 2 gears. One gear is 4 foot in diameter while the other is only a foot. That means that the one foot gear will rotate much more frequently than the big gear. That being said if a gear is spinning more often it's going to cause more stress. So we harden it to extend its longevity.

To make gears more wear-resistant

Not really.You don't need the entire gear to be hard and brittle,you only need the teeth to be hard.You would lose money by heating up that entire piece of metal unnecessary instead of heating up only the parts that need hardening.Heating up the entire workpiece works for small stuff but for stuff this big it's only a waste of energy,money and time

it sounds like i started up a mid 90’s wake boarding game

Эту музыку крутили раньше в качестве заставки на радио ВЕСТИ FM.

we generally use the word hardening or quenching. Tempering is a different process, similar to a stress-relief. Heating temperature is lower than Ac1.

Do the teeth come out fully hard like a file is? And if so is that suitable or does it need to get softened a little by another heat?

Tell me about it. That music was oozing corporate 90s in the most painful way possible.

I will play this tune at my parents funeral..

You are CGI.

@Guodlca inertia

@@richardjerrybest 🤯

@Guodlca I thought so too....maybe I'll be famous one day 🦆

@@kushkiller7108 Nah you're just stupid

Iya ini penyepuhan dengan media air sementara pemanasnya pakai elemen listrik semacam rangkaian kumparan pada kompor listrik

Ini surface hardening, pengerasan permukaan logam dgn cara pemanasan dan pendinginan cepat

Keith Rucker - VintageMachinery.org. He does this all the time repairing obsolete and rare machinery, check his site thoroughly, there's lots more info. ruclips.net/video/YWaF_QhcxA0/видео.html ruclips.net/video/PI96CzxFUPI/видео.html

Hey man you honestly might think about getting one machined

@@dplugCAPZ the teeth or a whole wheel? I hope not the whole wheel because it's about 20" and that would be too expensive to make.

@@cpu64 the wheel but if it's nothing precise man stack some welds on that bitch as hard as it might b assuming it's cast material and grind it you might not have to grind it I have seen 60 year old videos of them throwin non ground welded broken teeth gears in a tractor and run it

Have you heard about welding

например газовой горелкой. Горелка Бунзена была впервые описана в публикациях Роберта Бунзена в соавторстве с английским химиком Г. Э. Роско в 1857 году.

нагреванием металла и погружением в масло или воду

are you familiar with induction-hardening technology?

@@salesexporttecnoinduzione5902 yes. i imagine solving the automated cooling is also hard

@@corlfranco9371 nothing is actually easy but that's our job! :)

I wouldn't say brittle as the hard metal structure (martensite) is generated only on the surface of the toothing. Inside the tooth, the material remains softer!

Well like what do you think hardening means if it's not making something more brittle? "It won't be as malleable as regular steel" - isn't that the whole point?

@@sivansharma5027 of course the hardened layer becomes hard and brittle at the same time. A subsequent stress-relief treatment usually moderates this fragility. However, remember we're talking here just about surface hardening. The piece itself doesn't become "brittle". Mechanical and wear resistance increase very much on the surface. That's exactly what everyone is expecting!

@@salesexporttecnoinduzione5902 Sivan Sharma answered to Lloyd Filasol, not to you. Sivan says the same as you say...

Obviously there's a tradeoff. If there wasn't it wouldn't be optional. Also no one is stopping you from reverse the heat treatment if needed.

Hi Simona, thanks for your question. Generally, the machinery is 1200x4500x2470 mm (WxLxH), so definitively compact for such application.

... а теперь вам просто нужна техника! :)

no doubts, also a very good hardening m/c. So you know what we're talking about here! Thanks for your comment!

@@salesexporttecnoinduzione5902 ok,I know I see GH INDUCTION HARDENING M/C,more m/c make IH have in world

you should ask a metallurgist and if you do this frequently you should hire one

@@marouanebenderradji137 actually i am metallurgy student & i ask my doubts for study not for business purpose .

1. mostly, factors are related to the geometry of the workpiece. Further factors are related to the range of used frequency. Theoretically, every case needs to be analysed. 2. the question here isn't power-temperature, rather power-amount of time. 3. quenching times may be determined by the official CCT curves (Continuous Cooling Transformation). These curves are the results of quenching trials and are specific for each typology of hardenable steel. The CCT curves show the critical points you can use to determine the cooling speed. Not easy to explain in case you are not familiar with metallurgy. 4. even here: there might be a variety of possible heating powers to be employed - the matter is: in how much time do you wish to get the hardening area of your workpiece over the austenitization temperature? You need to know how many kg/h you wish to heat - in general higher power = faster heating speed. The quenching speed is related to the CCT curve of that kind of steel. Hope I put something better on clear.

@@salesexporttecnoinduzione5902 yes Thank u sir for ur reply .

Wrapping, I'd guess..

Thanks for your question. The induction hardening of high gear modules it's commonly performed by this technique: we treat the teeth one by one. In that way the hardening depth can exactly follow the shape of the toothing (countour hardening). You have to know that induction hardening ensures maximized repeatibility. Your question about the hardening of big gears through a one-shot system may require a high generator's power (more expensive machinery) and, in any case, you may not reach the final result: the contour hardening. What you're saying, of course, it's applicable on small gear modules for which you may eventually provide double-frequency systems in order to get the same result of contour hardening. On the other side, this system cannot overcome a certain range of powers. Hope it's clear.

@@salesexporttecnoinduzione5902 well explained...thank you

Iya kenapa ga serempak kok harus satu satu

In addition to what's been said, treating the teeth one by one allows for one design to be able to harden many different sized gears.

Sorry to inform you this is our machinery and the technology of inductor coupling and self-centering system is ours. Maybe you mean you are stealing this content/idea for yourself's use. That's not a problem for us!

...and working almost 24h each day

my email address is: salesexport@tecnoinduzione.com I would be glad to answer all your questions.

without music you would have said the video it's annoying. Just turn your speakers off!

@@salesexporttecnoinduzione5902 yes without music video is annoying. Ok why didn't you done case hardining why induction

@@Rk-ne3jr are you familiar with thermochemical heat-treatment? Case hardening is generally very expensive and SLOW. Additionally it finds application on low-Carbon steels and hardening depth don't generally overcome 0,3 mm! Induction hardening is FAST, CHEAP and you can reach heat-treatment depth of also 10 mm and more!

@@salesexporttecnoinduzione5902 you're neglecting to mention that there is such a thing as over hardening... If the teeth are over hardened then they will brittlize and become vulnerable to impacts and shockwaves. Also, the music is horrible. I would have actually preferred hearing the machine operate.

it's quenchant, this mean water polymer, usually 3-5% concentration, depending on material

It's quench oil polymer oil

Hi