steel hardening technique which is not taught in school. Make a sharp spiral TAP

[@psdaengr911]

When I went to Lane Technical High School in Chicago in the 1970s, two years of shop classes were mandatory. I took wood shop, electrical shop, foundry, machine shop, and forge. I and hundreds, perhaps thousands, of other boys were able to use and make metal tools and heat treat them before we were 17.

[@RasDharmarathne-eb2lg]

A country flourish when it's citizens armed with knowledge. Well educated workers are the back bone of industries. I watch this like magic but I am in a totally different field. But I am pretty sure that people in this field in my country aren't in the calibre to understand this.

[@stringlarson1247]

Cool. I firmly believe that at min. everyone should have to take 4 semesters of classes in 'the trades'.

[@АлексейЗолин-б8у]

Сэр я учился в СССР 1985-88 и тоже сбивал руки на производственных практиках. Но глядя на профанацию показанную в данном ролике понимаю всю степень деградации производственного процесса. Такие ролики не для наших нервов.

[@AmazingSmart-ngth]

The quality of your videos is outstanding, always making me learn something new!

[@George-rf3nf]

I can tell by the looks of the machines they have not been properly cared for and the accuracy is most likely poor

[@MarkCleverdon]

Thank you! A good show of achieving a final tool that works despite having limited resources. You selected the right type of steel despite all the comments below. I went to secondary school, and we did the "Engineering Workshop Theory and Practice GCE" (now I’m showing my age). We DID learn how to anneal and harden. One thing I miss from many KZbin videos is the annealing process, which prepares the material before hardening. By heating the steel to red hot and allowing it to cool slowly, you help avoid the tool from shattering. This ensures that no previous heat treatment has introduced stress into the material. After cleaning to see the white steel again, the hardening is done by color. A yellow-straw color would be the right color for this, and then you immediately quench it (just water is sufficient). If you go all the way to red hot before quenching, you may get shattering as the metal becomes very brittle.

[@MrKapeji]

The colour part of heat treatment is not hardening, quite the opposite, after anealing by heating to red heat and allowing a slow cool down, the piece is worked, then re hardened by heating to red heat and quenching (either in oil or water usually, depending on the steel type and job I think, I don't know) THEN after hardening, you polish the steel and carefully reheat until you see the colours develop, and re quench at the desired colour, straw for very hard but brittle, down to bluish for less hard, but tough. This process is called tempering, it removes some of the hardness but relieving tensions in the crystal structure but increases the toughness of the piece (resistance to snapping). Tempering then is a softening process, not a hardening one.

[@Walker7745]

Да... такой технике закалки не только в школе не учат (в школе вообще закалке не учат). Но даже в училищах такое не покажут: бросил деталь в воду - и все (правда, перед этим насыпал волшебной соли). Сколько я видел термистов, ни один так не делал. Опустив деталь в воду, они ее там болтают, чтобы остывала, а не паром, не проводящем тепло покрывалась. Спасибо хоть погрузил в воду вертикально, а то некоторые спецы в воду боком опускают, а потом удивляются, вроде точили прямую, а деталька изогнулась. А еще, каждая сталь калится при определенной температуре, определить температуру по цвету - нужен большой опыт Судя по манере бросания детали в воду у мастера этот опыт вряд ли присутствует в наличии. Сталь КН конечно можно калить при температуре КП но, результат непредсказуем. (для тех, кто в танке: КН - какую нашел, КП - какая получится).

[@KATEKNIK001]

Thanks 🙏🙏👍

[@panstakanski6116]

Солёная вода, как охлаждающая жидкость при закалке, иногда применяется. У неё теплоотводящие свойства несколько выше чем у простой воды, соответственно скорость охлаждения выше, степень закалки соответственно тоже. Для каких марок сталей такое применимо, к сожалению не знаю. я слесарь а не термист.😉

[@Walker7745]

@@panstakanski6116 А не надо быть термистом, чтобы оперировать простой логикой. Он насыпал соль в воду (как вы говорите, для лучшего охлаждения). Но не стал перемешивать воду деталью (при этом она значительно хуже охлаждалась). Я так и сказал: насыпал волшебной соли в надежде, что она за него работать будет. А вообще закалка в соленой воде - вещь специфическая. И применяется в основном при закалке труб из низколегированных сталей для упрочнения трубы, работающей на разрыв. Что еще раз подтверждает, что для этого _специалиста_ соль - это волшебный порошок что-то там (но неизвестно что) улучшающий. Магия. Ну нафига метчику прочность на разрыв? Ему поверхность нужна твердая.

[@MegaIce9]

​@@Walker7745просто солёная вода препятствует образованию паровой ванны. В термичках используют 1 кг соли на 10 литров воды.

[@panstakanski6116]

@@Walker7745 могу только дополнить, как слесарь, что это изделие не метчик. По сути это закалённый болт с продольными прорезями. Режущие зубцы у нормального метчика должны иметь затыловку конусность. Этим наверняка и объясняются несуразности на видео. Резьба там скорее всего не получилась. Таким только ржавые гайки прогонять.

[@andrewscott985]

Excelent video. Of course, those who stopped their machining learning once they finaly understood that the screw is the one that has the thread on the outside, will consider videos such as these, useless, clickbaits etc. etc. etc. For those who appreciate ingenuity, skills, dedication, this is a joy to watch. Thank you for sharing with us your work. Cheers.

[@KATEKNIK001]

Thanks 🙏👍

[@andrewscott985]

@@KATEKNIK001 🤗

[@marcragueneau2813]

"l'ingéniosité, les compétences, le dévouement" ... !!! TOUT es vieux, inadapté, de l'a peu prêt, aucune technicité actuelle. IL a apprit le métier il y a 100 ans. Heureusement on ne travaille plus comme celà avec des tours, des machines-outils de la 2° guerre mondiale (1939-1945 !!), des verniers de manivelles de déplacements quasi invisibles car rouillés qui doivent lire les microns (prend un dictionnaire puisque tu ne connais pas non plus). AH, ça fait du bruit ... donc ça fonctionne !! ... et tu veux nous faire croire que c'est un champion ... IL choisit SON ACIER à l'OREILLE et IL PRÉTEND TREMPER cet ACIER-LA dont on ne connais RIEN, c'est complètement dépassé,.tout juste bon à ébavurer. C'est mythomanes, honteux de prétendre autre chose. DONC TU est encore plus NUL que ton tourneur sensationnel NÉ EN 1920 ... !!!!! que de VANTARDS, mythomanes, esbroufeurs, manipulateurs malhonnêtes, trompant même les NULS comme toi, sur internet. C'est désopilant de bêtises. pauvre andrew, avaleur de couleuvre et de sabres !!!!!

[@dixienormus2101]

My Dad, who became a machinist, believed that a tool and die maker was the ultimate machinist's aspiration.

[@robertqueberg4612]

Yes, being a toolmaker, die maker, or mold maker was a way to show to yourself and others, that “you had it”. The work tended to be more varied in scope, and challenging on nearly each day. But, the title, or card from a program, was not what made the man. Producing the products needed, and not being afraid to share what you had learned, either on your own, or with the help of others that came before you, or even the ones coming after you, that had their heads screwed on straight. The sin, is in not wanting to listen to the thoughts of others, and not to give credit to the kid, when “the boss”, complimented you for the results.

[@ЛюбовьБарановская-з7р]

​@@robertqueberg4612нужно хорошо знать свойства, технические характеристики всех металлов 🤔

[@billynomates920]

that is how it was.

[@OndrejKromka-wg4sk]

😅hp​@@robertqueberg4612

[@michaelgfoth6214]

Dad said the same thing! Mom’s cousin’s husband could make or do anything!

[@goldCrystalhaze]

It is always amazing to see people with such determination! I"ve watched guys from Pakistan, Philippines, Thailand and India creating things with such minimal resources that it seemed impossible to do! Respect to all of you. Thanks for the video!

[@АлексейЗолин-б8у]

Да эти ребята покупали за 100 долларов пакистанские АК на один бой чтобы убить советского солдата забрать советский автомат и воевать с ним до окончания ухода американцев из Афганистана.

[@stringlarson1247]

Those videos are inspiring AF.

[@martinda7446]

Its all quite simple, it is amount of carbon and in some alloys other variables that determine the properties. But iron and carbon make steel and amount of carbon equals how hard it will be. Mild steel (low carbon content) will remain mild steel no matter what you do - heat it to melting point and quench in royal jelly, it will still be useless as a cutting tool. You need the right material and correct treatment. Just a fast quench will leave most harder steels brittle...You need to do the next process... To ensure some toughness.

[@KATEKNIK001]

🙏👍👍

[@1crazypj]

Mild steel can be made harder by using a surfectant, probably just a 'skin' though? (tests were not particularly 'scientific' just a hardness tester) As you say, water, even with salt does nothing at all to mild steel

[@martinda7446]

@@1crazypj You can surface harden, carbonising being most used, infusing carbon into the surface.

[@1crazypj]

@@martinda7446 Yep, I've case hardened stuff in the past, used Kasenit but there are a few other compounds manufactured in different countries. Plus, the ancient 'burned' leather method of case hardening

[@eudesprado]

E nada , só comentar com Diamantina ou com carbono de couro e jogar na água que fica top

[@nineteen-sixty-nine9373]

I liked metal work lessons in school.Our teacher did teach us that a high concentration of salt water is ideal to be used for quenching steal for hardening as the the salt prevents tiny air bubbles if were present would leave tiny weak spots on the metal.

[@KATEKNIK001]

Thanks 🙏👍

[@Raul28153]

reinforcing steel bar (Rebar) is made from A-36 Steel. It also is the same steel used in all steel construction is is also called structural steel, and that seel CAN NOT BE HARDENED. You can heat and quench it all day long and nothing will happen

[@severstar3868]

при нагреве горелкой образуется окалина.... размер инструмента уменшится.... слова технологам спсб

[@pcka12]

Perhaps he designed it a little oversize?

[@severstar3868]

@@pcka12 так не бывает

[@ThisIsToolman]

The circular form you used to cut the helical flutes gives you a negative rake. I believe if you cut below center you will reduce the negative angle. If you mill the flutes with a ball-end cutter below center, you can create a positive rake.

[@KATEKNIK001]

Thank you very much for the advice 🙏👍

[@mikestevens8046]

This kid would go nuts in a real machine shop

[@winchharry]

An expert in his field with his old lathe. It's nice to see, how save he can handle his machine. 🙂 Эксперт в своей области со своим старым токарным станком. Приятно видеть, как бережно он обращается со своим станком. 🙂

[@KATEKNIK001]

🙏👍

[@anthonylazzaro8969]

Attrezzatura..........e sopratutto PALLE ottagonali !!! Complimenti !

[@ЯисноваЯ]

резал резьбу в шестиграннике , пока до тисочков донес гайка стала круглой - Гениально )))

[@Тех-к6э]

Согласен кругом фейки. Хотя непонятно зачем им это надо.

[@Contro-versum]

Просто не показал как в кругляке нарезал

[@РамильГильмутдинов-н9ч]

Там шестигранник сыромятина был он его пока нес как пластилин смял в круг.

[@Лінкольндоларович]

@@Тех-к6э Воно з тієї серії,що "" реставрують""😊 190 мерседес-----що ради лайків смугасті не придумають

[@woodMasterOk]

​@@Тех-к6эне понятно зачем? Ну как же. Деньги.

[@vilyo1570]

It was pleasure watching you!

[@johnbirkenhauer4061]

Beautifully done, thank you.

[@KATEKNIK001]

Thanks 🙏👍

[@pauls.2526]

Brilliant 👏 God bless you hands and mind.

[@attaviyaali8259]

жалею, что потратил время на просмотр, но доволен, что почитал комментарии. это - самое ценное в ролике.

[@vanamee692]

Wow, that is one beautiful lathe. I've never seen a drill attachment for the compound before. Nor have I seen a lathe that could cut a spiral (thread with such a high pitch.) I am envious!

[@KATEKNIK001]

Thanks 🙏👍👍👍

[@troyallen8223]

I wish we could've seen the thread making in super slow mo.... That was tough to wrap my brain around. 👍🏼😁🤷🏼

[@DinoNucci]

Just watch at slower speed?? Smh

[@Darkice77]

The best thing about a lathe, you can make more tools that work with the lathe. What ever you can think of, is doable.

[@pcka12]

This is quite a versatile lathe, being able to cut the helical channels!

[@KATEKNIK001]

Thanks

[@deucedeuce1572]

Yeah, I wish more people had them and knew how to use them. Would give almost anything to be able to have one myself.

[@deucedeuce1572]

@@LuggageStardate Yeah, I've actually seen shops do that for the most part. If a person has time, but not a lot of money, he could make nearly any tool he needs to make nearly any tool he needs to make any tool he needs. I think there are some occasions though when it's cheaper to just buy tools instead of making them. Some tools also require a great amount of skill and/or a great amount of knowledge of math and geometry.

[@stringlarson1247]

@@deucedeuce1572 That's so true. There are always trade-offs. I like making tools, jigs, etc. I collect a lot of 'scrap'/'junk' for later use, and even then if I need parts (bearings, rods, connectors, etc.), the price can surpass buying a mass-produced tool.

[@xxskippernate409xx6]

You can also make "super-quench" by making brine and adding dish soap, though i cant remember how much soap to add. That makes it dissipate heat a bit faster than brine, i dont know how much though. If you know that your steel can be water hardened, you can try brine. If brine works, you can try super-quench, me thinks. But cracking or warping become an increasing risk...or guarantee...havent started yet to find out. But preheating your quench liquid can prevent thermal shock

[@KATEKNIK001]

Thanks 🙏🙏

[@Dmitry999999999]

Заточка резцов убила :) А вообще, метчики вроде затылуются... Но, если результат устроил заказчика - значит метод годен! :)

[@jrcannon8945]

Loved watching this video. My Dad was a Tool n Die maker, true artist. Now it is mostly a computer skill.

[@KATEKNIK001]

Thanks 🙏👍

[@LandgraFF74rus]

Я всегда думал, что инструмент для резки и обработки металла изготавливается из какой-нибудь прочной, инструментальной марки стали, а оно вон че оказывается. Взял любую арматурину и твори на здоровье.

[@radionjmadilov4820]

Не любую,А-3

[@LandgraFF74rus]

@@radionjmadilov4820 Это была ирония. Вон автор видоса, и тот повелся. Естественно, я не верю в возможность заменить сталью марки "пластелин м3" какую нибудь хирургическую сталь. Я, конечно, не спец, но, как мне кажется, задачи у этих материалов немного разные, не?

[@Московский_Колхозник]

@@LandgraFF74rus я тебе больше скажу. "Сталь-пластилин-3" вообще никак не закаливается ввиду почти полного отсутствия в составе углерода

[@АндрейРудских-г6ч]

Из режущей стали "Р"

[@peace4world84]

Unfortunately some people had negative comments instead appreciate the man for spending his time to show us

[@TomHerd-vm4vf]

Impressive skills being used with basic equipment and providing a good job. Also some cleaver operations which could save time, such as the flats being made while still in the lathe.

[@KATEKNIK001]

Thanks 🙏👍

[@tehhasrussian5714]

хорошо когда дома есть токарный станок и сварка,можно сделать много чего,было бы желание!

[@KATEKNIK001]

🙏👍👍🚥

[@integr8er66]

Not sure what school you went to, but it certainly is taught in school here, or at least was when I was there, but water quench is a bit harsh and can cause the metal to be brittle, we prefer oil quench

[@gadgetroyster]

I was taught that in 11th grade over 60 years ago. Salty water is better than pure water, but can still cause brittleness as it cools off too quickly. Oil is always better, even old used dirty oil.

[@jmd8693]

​@@gadgetroyster I once read the two processes can be used together to achieve better results, but I don't remember the details. Heat and water first, then heat and oil, or viceversa

[@1djbecker]

It depends on the steel, and you definitely need to know the alloy. Oil, water and salt water all have different cooling rates. Salt water is a faster quench than plain water, and can crack or shatter some steels where water would produce a good result. The key thing I learned in school is that it *can* be done, along with "look up the details when you need to do it".

[@1crazypj]

@@gadgetroyster It's actually an 'old wives tale'. Any surfectant works far better (dish soap) I remember seeing the tests done with salt water compared to soapy water, the soapy water allowed even mild steel to become significantly harder (although still only around 40 ~ 45 Rockwell C)

[@platinumsky845]

The quench isn't what makes a metal too brittle or not brittle enough, it's the tempering after quenching that controls how brittle it is. Apparently your school missed basic metallurgy, which isn't surprising since most don't teach it at all.

[@gregorioacosta1751]

Taladrina, aceite o agua para el enfriamiento de las herramientas de corte, para que el ángulo de corte les dure más, exelente tutorial, saludos cordiales desde Valencia Venezuela

[@KATEKNIK001]

Oke thanks 🙏👍

[@Алексей-ы6б2щ]

Я только начал смотреть и офигел, ему нужен пруток а он трубы смотрии, ещё постучал, жесть

[@claudiohase296]

Quem te disse que não é ensinado nas escolas ? Você faltou a essa aula de metalurgia !!! Há graus diferentes de resfriamento para têmpera. Desde ao ar parado, ar com fluxo (para aços rápidos, por exemplo), óleo parado, óleo com agitação em diversos níveis de agitação, água parada, água em agitação em diversos níveis de agitação, e salmoura parada e salmoura em agitação (o mais severo) !!!

[@KATEKNIK001]

🙏🙏👍

[@АлексейЗолин-б8у]

Для автора ролика ваши слова это марсианский язык. Просто сделал деньги на просмотрах.

[@PackthatcameBack]

Yeah, saltwater hardening is a thing. Also, please sharpen your cutters more often, the uneven scratches left behind in some of those cuts hurt to look at.

[@KATEKNIK001]

🙏👍👍

[@yestfmf]

It is, after all, hard water……

[@stringlarson1247]

I love honing my sharpening skills :) I've got so many drill bits from people who don't know or care to sharpen them. Also, knives, scissors, etc., I'll often take a bunch and sit down and sharpen them either for my own use, give them as gifts, or donate them. I hate watching someone I may be working with struggle with a dull tool.

[@hib723]

Nicely done!

[@KATEKNIK001]

Thanks 🙏👍

[@starfighter750]

E' apprezzabile l'inventiva ma non certo la precisione e l'accuratezza della lavorazione che per un tornitore sono caratteristiche essenziali.

[@hafishan7]

Nice concept video for locals 👍

[@Maggioretom]

Knowledge of the experience, magic hands: with these two ingredients, a man can build everything👏👏👏.

[@حمزه-ط1غ]

مشاء الله مبدع والله يا معلم 👍👍👍

[@KATEKNIK001]

🙏👍👍

[@danandreinicoara1872]

Fain lucru și-o adevărată artă prietene ,multumesc de timpul tău petrecut cu folos ptr toti.All the best for your activity,and famili.

[@KATEKNIK001]

Thanks 🙏👍

[@ramonta3]

Agua y sal, no lo sabía, también comento que no soy de esa rama pero está bien aprender.

[@KATEKNIK001]

🙏👍👍

[@firstielasty1162]

I was wondering about rake & a relief angle, but it certainly worked to thread that nut..nice job- creative using what is on hand.

[@KATEKNIK001]

🙏🙏👍👍

[@AsitShouldBe]

better done than perfect😁

[@JamesStripling]

This was not worth watching. What kind of steel did he start with, something for a motor shaft? Maybe 1045? That's a mild steel. There isn't enough carbon in it to temper. So going through all of the machining motions was kind of interesting. The tempering was a clown show. Even if that was a good piece of HSS or other tool steel like W2, it wasn't hardened correctly. That kind of treatment would be good for a file but would have left the steel too brittle to use as a tap. It would have shattered. The temper needed to have been drawn out by soaking it in an oven at 175C to 200C for around an hour to refine the grain structure and give the steel some spring. But sadly, no, this was not done and everything after that was fakery.

[@jackwillson8099]

Very true if he had 01 tool steel he have a chance lol

[@sevazinhogamer9521]

Thats why this "technique" isnt teached in schools

[@captainblackbody6350]

I tried Salt Harding before, and it doesn't go well, you have to educated about matal and its molecular structure also temperature Play it's roll very strictly in process, and more factors is also involved in steel hardening you just can't get it in one video on KZbin z👍🏻👍🏻👍🏻

[@ICHING_EDU]

I agree. It is not simple for all types of steel

[@motormaker]

St90 is AISI 4340. I looked it up because I’ve never heard of it before. You might get away with tapping a few holes in aluminum, or plastic perhaps a hole or two in mild steel but it will never have a level of hardness and toughness needed for a significant amount of holes. This is a fast quench method. Oil quench is slow, water quench is faster, and brine quench is faster yet. I learned about it in tool and die school. It was pioneered by the south bend chilled plow company in South Bend Indiana,USA.

[@joseaureliohurtado5442]

MUESTRAS SER UN FREGONAZO EN ESTE OFICIO Y GRACIAS POR ENSEÑAR ESTOS TRUCOS SALUDOS Y ESPERAMOS MAS

[@KATEKNIK001]

🙏👍

[@Diy_Cnc84]

This video is helpful. Thanks 😍

[@KATEKNIK001]

🙏👍

[@ScorpIron58]

What struck me here, was chucking in the water ,and just leaving it at that angle, you will create a likely fracture line where the steel enters the water. Should be moved gently up and down... and then tempered afterwards TOO! Don't expect it to last very long fella...

[@aviatrix2]

Love the engine degree wheel! 🙂

[@guacakep332]

Buset, yang komen bule bule semua Om. Saya kira Anda memakai mesin bubut CNC, ternyata manual tp hasilnye luar biasa Mantaapp.. Makin sukses dan terus berkarya Om.

[@KATEKNIK001]

Terimakasih banyak

[@Joshua-o6g9b]

That was brilliant keep up the good work!

[@KATEKNIK001]

Thanks 🙏🙏

[@nazacom2152]

Hahaaa justru yg menarik cara pembuatan alat tabnya.. Tapi bagaimana jika garam dicampur dgn oli sebagai pengeras, mngkin lebih kuat ya.. 👍🙏

[@KATEKNIK001]

🙏👍👍

[@Gex121]

Clickbait thumbnail. He never used rebar

[@Tricknologyinc]

Pretty sure you want to cut the threads and harden it before you flute it by a grinding procedure! It's going to give you the cleanest cutting edges ...But what do I know!

[@octymocty132]

Skills that were are losing or have lost in the UK excellent vid for I'm in the poo I need a tool to get me out of it

[@عالمالوحوشوالقوةوالافتراس]

Good job congratulations man

[@KATEKNIK001]

Thanks 🙏👍

[@sureyyaarseven6552]

Hangi okulda öğretmemişler anlayamadım.Üstelik bu yaptığınız sıcaklık, soğutma hızı( soğutma ortamı) ve malzeme cinsinin fonksiyonlarını gözönüne almayan bir yöntem. Ölçme vs. yok. O yüzden bu şekliyle okullarda anlatılmaz. Her malzeme ve istenilen sertlik değeri için malzemenin ısıtıldığı sıcaklık, soğutma hızı (yani soğutulduğu ortamın iletkenlik derecesi hava,yağ, tuz vs) ve soğutma süresi bir faktördür.

[@KATEKNIK001]

🙏👍👍👍👍

[@Sanja_76]

Метчик для нарезания резьбы в куске мыла!👍 Отличная работа!

[@MrZetor]

Wait, what? What exactly was the mysterious steel hardening technique, quenching? Or quenching in brine?

[@Immortal_carp]

Никогда не слышал чтоб на воду с солью калили, а уж то что он не сделал угол наклона режущих перьев это вообще атас) Такой метчИк застрянет и ничего не нарежет!

[@alexkor8702]

ПРИ ЗАКАЛКЕ ВАЖНА СКОРОСТЬ ОХЛАЖДЕНИЯ ВОДА ДО 20 ГРАДУСОВ СКОРОСТЬ ОХЛАЖДЕНИЯ 300 ГРАДУСОВ В СЕК ПРИ 40 ГРАД 150 В СЕКУНДУ У МАСЛА ТАКАЯЖЕ СКОРОСТЬ У СОЛЁНОЙ ВОДЫ 600 ГРАДУСОВ В СЕКУНДУ НО ДЛЯ КАЖДОЙ МАРКИ СТАЛИ НУЖНА СВОЯ СКОРОСТЬ ОХЛАЖДЕНИЯ. ЗАКАЛКА ЭТО НЕ ТАК ПРОСТО. ДАМАССКИЕ КЛИНКИ ЗАКАЛИВАЛИ В МОЧЕ ЧЁРНОГО ОСЛА ТОТ ЖЕ СОЛЕВОЙ РАСТВОР. В ЦИФРАХ МОГУ ОШИБАТСЯ.

[@PauloJAAraujo1]

Agradeço muito à você por compartilhar o conhecimento! 👍🏻

[@KATEKNIK001]

🙏👍

[@stingingeyes]

It's nicely machined - everything good until the steel was quenched. Where was the tempering stage? The result is rock-hard yet brittle carbon steel, liable to shatter under load, or even dropped. Even sticking it in a domestic oven at 240C for an hour would have helped to impart some basic tempering and reduce the effects of that brutal quenching.

[@ntal5859]

You don't temper harden Steel. The reason it is hard is the quenching which cools the outer layers so quickly it places huge pressure on the internal crystalline lattice, this in turn pushes outward...(Look up prince Rupert drops,) That out ward pressure and the combination of the salt penetrating the top layers is what makes it hard. Tempering would remove that outward pressure making it just tear the top layers off.

[@stingingeyes]

@@ntal5859 ST90 is 0.7% C/1.3% Mn/1.3% Si structural high carbon steel. Quenching ST90 steel creates martensite which is extremely hard but brittle. Unless there's something unique (like 13% Mn Hadfield steel being quenched), that brittleness needs reducing by tempering.

[@H2kfighter]

i heard you can coat low carbon steel with a charcoal slurry when heating to help raise the carbon content a bit, but idk i just get the tool steel

[@فارسالتميمي-ع7غ]

Yes, it will improve it just a little bit

[@jonmart7962]

Muchas gracias por compartir👍👍🇸🇻

[@KATEKNIK001]

🙏👍👍👍

[@perfesser944]

Brine hardening is CERTAINLY taught in schools. At least I do teach it in my metallurgy course. Salt prevents the formation of a stable steam jacket around the hot steel, thus allowing for the fast cooling required for the formation of martensite.

[@KATEKNIK001]

🙏👍👍👍

[@aubrymacielpereirafilho3017]

Valeu muito obrigado! Brasil 🇧🇷

[@KATEKNIK001]

🙏👍👍

[@GilvanFerreira.De.LimaGilvan]

Que tipo de produto e este? Que vc está utilizando pra fazer esta temperar?

[@ogreunderbridge5204]

It seem to me a lot of you sandal wearing sand land boys often know quite a bit about basic/intermediate machining and general metal manufacture. Where do you pick it up ?

[@yuricopperhooves]

Oh wow, throwing hot metal into water. Why never thought of this anyone?

[@CongRaoDepVlog]

Thật sự là khâm phục tay nghề giỏi ❤

[@KATEKNIK001]

🙏👍

[@joels7605]

The man has cuts all ove rhis hands. That's how you know he's serious.

[@Dr._Spamy]

I heared about red heating tools, submerged in a melt of salt, to avoid the oxidation on the surface. On the other hand I just don't know what quenching into an solution of water and sodium chloride would possibly do !? By the way - Is there no tempering needed after quenching ?

[@serhandogan4366]

Kor halinde ısıtilmış malzemeyi tuzlu su , karbonatli su ,katır sidiği , katır tırnağı bu at ya da inek te olabilir ,yanmış yağ bunlara batırildığı yada basildıgı zaman karbon oranı artar ve sert bir celik elde edersiniz 200 derecede 20 kd firinda pisirip yumusatmanız gerekir aksi halde cok sert oldugu için kırilir.

[@KATEKNIK001]

🙏👍👍👍

[@Goedeke_Michel]

Well done. Awesome.

[@KATEKNIK001]

Thanks 🙏🙏

[@juancarlosricarti7215]

me parece una genialidad. No sé casi nada de tornería pero me impresiona muy bien la habilidad que creo estar viendo, aunque entiendo que hay que tener más conocimiento para calificar. Me gustó ver la elaboración. Gracias!

[@geraldosalomao2895]

Thank you Very much.!!!!!

[@billn8555]

Clickbait. quenching, annealing, post heat treat is basic engineering material science taught in school.

[@steve479976]

Not in the UK. All safe easy subjects for the league tables now. Drama, Media Studies etc.

[@jimmykulik3438]

Amazing skills you have sir! The lathe is the only machine that the make duplicates of itself, with the right!❤ person!

[@KATEKNIK001]

Thanks 🙏👍👍

[@NielMalan]

Nice. Now show us how you screw a shop-bought bolt into that nut.

[@RaimundoNonato-nk9sc]

A melhor máquina imperatriz inventada até hoje! Infinita opções!A Têmpera.nem se fala! Isso é realidade!!

[@KATEKNIK001]

Muito obrigado amigo 🙏👍

[@ricardoherrmann8868]

Tu é bom mesmo. Baita profissional

[@ricardoherrmann8868]

Pelo menos no torno, porque tempera de materiais aí já não sei, você mostrou tempera com água e sal , salmoura, funciona sim , mas não mostrou o revenimento.

[@KATEKNIK001]

🙏👍👍👍🙏

[@johnbyrne4438]

I like the accompanying music.

[@dinamoarg]

Perfect. Now make a video on 'how to sharpen an old scissor" 5:06 😂😂

[@928hparedes]

Bending its blades.

[@АлексейЗолин-б8у]

Как говорил мой знакомый разбирая после смерти владельца пакистанский АК Этот Золотой доллар так похож на настоящий. Затем плюнул и выкинул его в пропасть.

[@dinamoarg]

@@АлексейЗолин-б8у No idea what you are saying, It doesn't give me the option of 'translate', IDKW

[@watamuppet24]

Everything was blunt hahaha even the scissors ✂️

[@skunkjobb]

Shouldn't the tip be slightly conical? And without any relief on the threads, this tool must have very high friction.

[@KATEKNIK001]

🙏👍👍

[@jaydenkerr912]

6:45 your hand was resting on a vise, use that instead of your hand so when the grinder kicks back it doesn't chop your fingers of, also that way the heat from the nut wont burn your hands

[@KATEKNIK001]

🙏👍👍

[@АлексейКолпаков-т9ф]

Чтобы сделать режущий инструмент из стали марки ,,КН", надо хорошо знать свойства этой стали, а также и то, до скольких единиц по Виккерсу её можно закалить, чтобы инструмент не портился при работе.

[@achdumeineguete]

Kuli Technique = Cool Tech 💪

[@KATEKNIK001]

Thanks 🙏👍

[@ramennaidoo162]

To my knowledge, only carbon steel and high speed steel is used to make drills & Taps.

[@KATEKNIK001]

🙏👍👍

[@galewollenberg786]

see my comments. this video is mostly stuff that gets people disappointed if they try it.

[@mochamadiskandar5293]

Pak, Saya Pernah Beli Pahat HSS, Tapi Pas Saya Asah Ko, Terasa Lunak Yaa (mungkin Palsu), Dan Umur Pemakaiannya Juga Ga Lama, Apakah Pahat HSS Itu Bisa Di Buat Lebih Keras Lagi, Seperti Perlakuan Panas Pada Video Di Atas, Mohon Petunjuknya, Terimaksih

[@Frank_golfstein]

Oiga.... hem, el templado si se enseña en escuelas destinadas a eso. Digo, una escuela de abogacia claramente no va a enseñar Tratamientos Termicos. Partir de un metal base con buena templabilidad, claramente es el camino conveniente. Lo interesante seria hacerlo a partir de un acero Sae 1020 o un F24. De todos modos, excelente video. Me gusto el accesorio para hacer el dado del macho de roscar. Saludos.

[@anttilahtinen4583]

This video showed the normal hardening using salt water quench. The most basic stuff, which was taught at school. Where is the "not taught in school" part?

[@ИгорьБаранов-с2р]

Из токарного станка сделал фрезерный и строгальный,красава

[@KATEKNIK001]

🙏👍

[@myadventureman2636]

Fungsi garam dilarutan buat apa ya Mas? buat meningkatkan kekerasan ya. thks

[@parnuzutech]

good idea👍

[@KATEKNIK001]

Thanks 🙏👍

[@anthonybachler9526]

Exceeded my skills at about the 2 minute mark.

[@KATEKNIK001]

Thanks bro 👍🙏

[@RohitOneWho]

Im also fitter but i worked in company and belive me They squize u that hard that u gona regret Well its not we go for work but in india job is slavery I ses many companies But there not hope Open workshop its best man 🙃🖤

[@KATEKNIK001]

🙏👍👍👍

[@geraldosalomao2895]

Thank you!!!!!

[@KATEKNIK001]

Thanks 🙏👍

[@carlost9454]

Some knows this music? For some reason I find it fascinating.

[@USERMEX1000]

Teary Eyes Dangle. Musical Beats.

[@rcpmac]

ask your phone

[@job38four10]

Good video, you didn't need to click-bait rebar. I was wondering if rebar was regular mild steel or a higher grade steel.......

[@nemo6282]

N500 unless its the 'softer' rebar for swimming pool forming

[@mazenalfar5953]

Really creative. I learned how to repair iron. Thank you, my teacher

[@KATEKNIK001]

Thanks 🙏

[@mauriziograndi1750]

Was a pleasure to watch your skills. Thank You for sharing.

[@KATEKNIK001]

Thanks 👍