Differentially Hardening a Citadel Katana
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- Опубликовано: 27 сен 2024
- On location in Phnom Penh, Cambodia with the premier manufacturer of Japanese swords, Citadel Knives and Swords. In this video one of their world famous swords is clayed, heated and quenched to produce an authentic hamon temper line by the process known as differentially hardening.
Additional footage includes grinding the same blade to check for any flaws that may have spung up in the tempering process and footage of other blades being refined and polished.
This video is embedded in a pending article about Citadel Knives and Swords. Truly amazing blades with an attention to detail usually only seen on high end custom swords and genuine Japanese Nihonto.
Hmmmm....this makes me not want a Citadel. Not the process I pictured for a 2k + sword. Looks pretty ghetto. I won't pay 3k for a sword forged in a trash can and de-tempered on a power tool
That is exactly what i feel after i saw this too, bruh you are my man😉😂
There's something poetic about having such a nice sword forged in garbage though hahaha.
But yeah, my people are ghetto. No offense taken, it's just a poor country trying to play catch up with the rest of the developed world. Hopefully these folks are being paid fairly if 1 sword could cost $3k
Just keep in mind that Citadel is a company started by 2 Frenchies. This is pretty much a sweatshop
My Citadel ocean katana serial #028 of 100 looks great! Nice job guys.... Small review of it on my channel and another disassembly video also...
Cool!!!!!! The quench tank seems a little small though.
Maybe, but it does the job. They don't mass produce their swords, maybe 25 a month at best. So a big tank isn't really needed..
So they shape it before quenching, but differential tempered quenching use to be the reason the blades had a curve to them instead of making the curve in them.. Also wouldn't using the grinder on the belt without water after heat treating the blade ruin the hardening process? hmm.
Brad Jensen yes there is something strange about their process. It is not unusual for smiths to add a little bit of curve to the blade prior to quenching in order to get the end result they want. I have added anywhere between 1/4 and 3/8 of an inch to the Japanese style blades I have done during rough shaping. The one thing that really stood out to me is that I do not believe that was water they were quenching in but some sort of oil. Water would have hissed and boiled like crazy in a tube that small, and it certainly would not have produced smoke. I think that was probably vegetable oil. You are also right that grinding after heat treating without constantly cooling the blade can easily draw down the temper.
@@TheLawDawg its not good at all. the blade will curve greatly if done in the japanese fashion.
What kind of steel is that?
1075 Carbon steel imported from France apparently
Forget all the Japanese and Chinese Katanas! Katanas made of Tamahagane in Japan are not as good and durable as the Katanas made of modern Hungarian S-132 Carbon Steel which cost only around 1000€ and are fully and traditionally hand forged by a Swordsmith who has recieved for one of his works (a Tanto) a 3rd Dan ranking from Japan in 2009. About the Chinese Katanas.. they are mass productions mostly made by hammer machines and there is no specific qualified Swordsmith working on them. Just watch how Katanas are made in Longquan.. Order real Katanas from Hungary made of the best steel which is available and spare a lot of money!
SwordBuyersGuide actually it’s DNH7 steel. 1075 only has four elements while DNH7 has five elements and in slightly different amounts. Google... (1075 composition analysis) and (DNH7 composition analysis)...
1075:
C 0.70-.080%
Mn 0.40-0.70%
P 0.03%
S 0.05%
But DNH7:
C 0.70-0.80% Same on above 1075 steel... it can vary.
Mn 0.40-0.90% up to 20% more
Si 0.15-0.35% 1075 doesn’t have it.
P 0.030-0.045% same or more...
S 0.035-0.050% needs less or can be the same because Si adds strength and flexibility.
See??? So DNH7 is probally like 1085 or 1095 or in the middle. I’ve got the Citadel ocean katana. It’s on my channel. Others have done longer reviews on them and close up already so I didn’t... But I’ve got one!!
@@SwordBuyersGuide not 1075.. there is a french maker than makes a .75 grade carbon steel like used in the french chef knvies its probably that grad.e. IF they import form france but tax would be huge 100 percent or more... its probably locally acquired carbon steel from china, japan, taiwan or south korea. that have trade agreements with cambodia.