- Видео 2
- Просмотров 10 328
Josef Hausner
Чехия
Добавлен 7 дек 2020
The Making of bloomery iron from iron ore in european furnace from 6th century
Process of making iron in 6th century. We used pelosiderite iron ore. The furnace is built according archaeological finds on the territory of Great Moravia.
For detailed description turn on the subtitle.
For detailed description turn on the subtitle.
Просмотров: 1 581
Видео
The making of bloomery steel by recycling and carburization of low carbon steel
Просмотров 9 тыс.4 года назад
Simple method how to create steel with old way. Similar process like making of oroshigane in Japan or steel in Aristotle furnace. btw. Don't worry. There is a hardening oil in the canister with a combustible mark. I used canister from thinner here ;)
Great demonstration - your power hammer would greatly appreciate it if you took smaller bites of steel when drawing out. Full face blows should only be used for flattening and initial setting of a weld. It's very inefficient to draw out steel with full face forging. Try slowly feeding in the steel forging one or two blows on a 2-3cm section of the bar then feed it in another 2cm and repeat so you take bites all the way down the bar. When you get to the end, run the bar backwards taking full face blows to flatten out any steps that remain. I hope this helps! Cheers! - Jens
Nice result from a short furnace. How much ore did you charge into the furnace total?
12 kilos
2kg (66%) lost from refined bloom to homogenised bar? Is that all as hammerscale during forging?
Yes, exactly.
When I saw you place a tripod and lever atop a weighted bellows the size of a comfy chair, I KNEW you guys were serious. :o Fantastic bloom - I found myself wishing you had a water-powered hammer on a cam, to give you plenty of solid strikes before it cooled down!
if the water flows from a couple of raised barrels, then a half dozen folks can keep filling buckets from the bottom reservoir, to combine their efforts into regular, heavy hammer-mill strikes... anywhere you can get 2 barrels of water!
Well done ! So many seem to fall at the last hurdle by beating it to pieces with a large hammer and a macho attitude. Gently coaxing it into a more consolidated mass and then slowly increasing the strength of the hammer blows, will get the job done properly.
It always depends on the quality of the bloom. If there is a large amount of slag and "bubbles" in bloom, then the blows has to be gentle and ideally made by wooden hammer. If bloom is "clean" and compact, you can use your max strength with steel hammer.
@@josefhausner9668 Quite so. The skill is in correctly judging when the conditions and the time are right to increase blow strength and that is a knowledge gained by experience. I still think that in many videos impatience has a lot to do with poor recovery from an otherwise decent bloom, and in some I have seen, 'playing to the camera' might also be a factor. It is also true to say that, when this is done well, it can be made to look easy to do, which leads to disappointment for those trying it perhaps for the first time. Again I say to you, well done!
Doufám, že se nebudete zlobit - pokračování příběhu😊 ruclips.net/video/wb_B4DmRUdI/видео.html
👍👍👍👍👍👍👍
👍👍👍👍👍👍👍
Subbed
Enjoyed a lot Fantastic blacksmithporn Thx Jim the Netherlands
Thx
Hello! Congratulation! Very cool video and certainly a very interesting adventure! It makes me appreciate all the effort our ancestors must have gone through to make iron and steel tools, knives and swords... Thank you for showing to process! All the best! Jasmine
Thanks, I'm glad you liked the demonstration
Very smart setup, building up your forge into a hearth seems very practical and functional 👌
curious to see what you made with the steel, I guess a nice sword or knife. love these channels, sad that you only made 1 video
You just demonstrated why iron was so expensive before the industrial revolution. Good show!
Does this process add enough carbon to make a knife with?
Yes, the steel is hardenable.
Have you ever made a fire steel from wrought iron or a bloom? Getting a high carbon input to make one in a clay and bellows forge outside is proving difficult. I've made carbon steel from wrought iron and it throws sparks but it's not high carbon like an old file. I've tried clay pack carburizing for over one hour and also leaving the metal below the toyeur air input in the carburizing bloom zone for a half hour period. Both methods added carbon but not lots as hoped for. Any help would be appreciated. Thanks.
Yes I have made fire steel from iron bloom made directly from iron ore you can see in this link (ruclips.net/video/u0YsdS9DYuQ/видео.html). During Iron smelting, there are many variables that affect the amount of carbon in final steel. Such as height of furnace (higher=more carbon), air bellows volume and pressure(higher, bigger=more carbon), fraction of iron ore (the finer fraction = more carbon), ratio iron ore/charcoal (more charcoal= more carbon) slag tapping frequency (slag cover iron bloom and prevents carburization of iron bloom).If you want to use carburization in forge as in my video, you try to use higher forge, higher pressure of blower, try use smaller pieces of input iron to maximize the surface. I hope my advice will be useful to you.
Thanks Josef I will for sure check that video out.
Hvad strø han på
It flux for easier welding, exactly Sodium Tetraborate ( Na2 B4 O7). Loess or silica sand or grass ash was used in the Middle Ages, but when you use Sodium Tetraborate its easier because it have lower melting point.
Great stuff man, that was awesome! 🇨🇦
Thanks
Would it work to somehow mix my mother-in-law into the low-grade steel before melting it, and burning it off?
I am not sure, I have never try it. So you should try it and share result of this experiment. I think this additive will spoil the whole process.
That's one hell of a power hammer you got!
Will love to see more vids please! Just subscribed!
I have some ideas for videos. But today I don't have to much free time, because i have 8 months old daughter. I would like to make one video till end of this year :-)
I'm gonna try this but I'm going to do it with the shredded up body parts of an old impala I have a horribly rusted, untitled, and wrecked 1966 impala that I got for free and I think it's metal isn't galvanized
How much time did it take to "cook" this?
Approx 2 hours for making bloomery and 2 hours for blacksmiths welding.
Nice! How can I be sure to obtain steel and not something with more or less the same carbon content than what has been put in the forge? It's hard to carburize... Also didn't you lose a lot of carbon during the cleaning process? At the end it seems that it's not full of carbon
The amount of carbon is affected by the fraction of the input material.The smaller fraction, the more carbon the resulting steel has. Another parameter affecting the amount of carbon is the height of the furnace. The higher furnance, the more carbon the resulting steel has. You have to try what will ideal for your needs. You can estimate the amount of carbon by spark test or you can try if its posible to hardened or not.
@@josefhausner9668 Thanks for the infos
If you left it in the furnace longer, would it absorb more carbon? I’m thinking the taller furnace will extend the time it’s in as it flows down. Great video. I am working towards this.