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nprovos last won the day on May 11

nprovos had the most liked content!

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  • Location
    Mountain View, CA
  • Interests
    computer and network security, blacksmithing, martial arts, and lots of reading.

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  1. nprovos

    In Dublin

    It was built between 1712 and 1732. The Museum of Ireland in Dublin is great as well. They have a nice Viking-age display. Here is a pommel from an 11th century sword:
  2. nprovos

    In Dublin

    Definitely worth a visit even without blacksmiths :-)
  3. nprovos

    In Dublin

    I find myself in Dublin for a few days - currently waiting in line to see the Book of Kells. Does anyone here know any bladesmiths or blacksmiths in Dublin? Would be fun to visit a shop.
  4. nprovos


    Looks like it's back for another 3 months :-)
  5. nprovos


    I am traveling to Dublin right now. It will take a little while before I can look into this.
  6. nprovos

    Hearth Steel Ala Emiliano

    Here is the video that goes with it:
  7. nprovos

    Hearth Steel Ala Emiliano

    Here is another high carbon puck (1050g input -> 925g puck). And here is the knife polished up, quite a few areas where the forge welding did not complete but good enough to finish up: If you look closely you can also see the differential hardening/shallow hardening from the wedge shape of the knife. Let me know what you think, Niels.
  8. nprovos

    Hearth Steel Ala Emiliano

    Not a lot of folds. Maybe 7-8. Some were triples. I had some difficulties getting carbon in initially and it was due to excess oxygen.
  9. I wanted to share some photos from a recent hearth steel experiment we ran. The setup replicated how Emiliano has been producing hearth steel. Our protocol may have been slightly different: Input: Mild Steel (1in x 1/2in x 5/16in) and charcoal (1in pieces) 7 charges (150g mild steel + 400g charcoal). 1 charge every 4 minutes. One additional charge of 400g charcoal. Output: ~950g of high carbon stuff Here are some pictures of the setup: 7 Firebricks standing up; 1in tyuere at roughly 3/4 the height of a firebrick angled slightly downward. In action video Extracting the puck. After quick consolidation on the power hammer. Spark test. Looking good. Knife after heat treatment. Unfortunately, I made the tang transition below where I forge welded some mild steel. Oops.
  10. nprovos

    What did you do in your shop today?

    We made some hearth steel a couple of weekends ago. Ran into some issues at first but Emiliano came to the rescue with sage advice. Here is a knife from the material after heat treatment.
  11. nprovos

    Building a Metal Dust Collector

    I never tried to cut with a torch before. I should have read up on it - on the other hand, it was sort of amusing trying to chase the heat around the cut and seeing it clearly not working. The plasma cutter is a blast, I have been using it for lots of other purposes as well, e.g. repairing the side blast forge. Thank you.
  12. nprovos

    Building a Metal Dust Collector

    Here is an update. I get to try the sucker for the first time :-)
  13. nprovos

    Rebuilding a Side Blast Forge

    Here is the latest progress: Installed pivot for the air lever. Plasma cutting and extremely poor sheet metal welding to repair the back. I replaced it with 16 gauge instead of 17 which might make it last a little longer: Finally installed the tank and the tuyere: Almost looks like new :-)
  14. At the shop, we have been using a side blast forge for general blacksmithing. It's a great tool as clinker can be removed quickly without great interruptions to the fire. The side blast forge relies on a water cooled tuyere. After more than ten years of great service, the air pipe finally rusted through. I have attached some photos of the surgery and reconstruction. Forge area with tank removed: Tank cut open with plasma cutter - at that point it was clear already that the tank needed to be rebuild as well: Removing the air pipe with a die grinder: Fitting the new pipe: Rebuilding the tank from 3/16" steel plate: Finally leak testing the rebuild tank: It still needs to be installed and tested but this is how far I got during my holiday break. Happy hammering. Niels.
  15. nprovos

    Forging a "Viking" Broad Seax

    I am glad you like these videos - they certainly make me appear much more competent than I feel in the moment. Especially straightening after a heat treat is something that I find exceedingly stressful :-)