Jump to content

John N

Supporting Member
  • Posts

  • Joined

  • Last visited

  • Days Won


Everything posted by John N

  1. Sorry about the job! - found you on instagram though and given you a follow! ( im @non_jic )
  2. It might all change once its up to a decent heat, 1000c or so - just got to keep pumping the BTU's into it until it gets there. Possibly like a nuclear reactor that forge, once its running, just leave it going - never shut it down. When its hot, it will only take buttons of gas to keep it hot
  3. Nice looking build on the forge! I know nothing about ribbon burners, so cant comment on that aspect of the build. I think I saw you had to put in a massive amount of refractory cement when you built it. (If I recalled that correctly), it will take a hellish amount of gas, and a long time to get to welding heat. On the bright side it will have an amazingly quick workpiece heat time once up to temp. My main forge has about an inch of castable refactory, over a couple of inches of wool, and it takes about 30 mins to get to welding heat with the gas whacked up. Once hot its epic though.
  4. Made about 30 of them Alan! There are 20 'in the field' and 10 nearly ready to go. I'm keeping the updates low key so as not to sell them, as I am sinking under industrial forging work again. In other interesting things I am doing in the shop today (well, the last few weeks.....) - Yesterday got my 'blagged' 5 axis Mikron CNC milling machine working 100%. Its a bit of a beast at 8 tons. If my motivation holds it will be used for making parts for the '12' forging press, but really its just to machine ferrules for my chefs knives Just need to work out how to use it, as a CNC newby. Fortunately my industrial estate neighbour is really good on Heidenhein control, so will hold my hand in exchange for 'table time'! Had a couple of weeks away from work, holidaying and travelling around. Excellent 'BABA' blacksmiths conference for a weekend, including a smelt by a couple of very nice chaps of this manor. My knifemaking itch has now returned, and needs to be scratched after a difficult 3 years. I have sorted out my finishing shop, which had become a shit dumping zone, and have ordered a 'Chisel Morticer' and a few other bits tonight to ease handle making. There is a knife show in the UK next month, and I should be able to have 4 finished knifes squatting on the corner of another makers table if the wind stays in my tails. Blades forged and heat treated in the past, they look nice, so an attainable goal to get them finished! Ill update with pics if I remember to take any
  5. Not sure if this instagram link will work, but I made a really tiny museum! (if the link does not work im @non_jic on insta!) https://www.instagram.com/p/Cv0QRsStHhg/
  6. Hi @Will Robertson - sorry for delay in reply, not been on forums much, life got in the way! Brief answers..... I cold forge stone cold after a full anneal. I drop my normalisation temps by about 20 deg C per cycle, so, for example 820, 800, 780. (or slightly below critical on the last cycle). I don't understand the science of this, but do it anyway, and it works for me! I don't use scrap steel for the core. The core steel is really cheap in the overall cost of things. Nowdays I use Aogami super blue from Japan. Its still only $15 a blade if you are forging to near finished dimensions (and it adds $100 to the sale price of a chefs knife) - O1 is an epic core steel, and costs virtually nothing. I soak the newly set weld at full welding temp after setting it. My forge is not that adjustable as it has a hard lining so a very slow thermal response! - guessing 1100c I use borax as flux, but I suspect its a placebo for me, and the weld would stick without it. My forge is pretty neutral atmosphere, and I can tweak it rich. If I am using pure Ni in the san-mai billet as a barrier layer I now seam weld it all to keep the air out. Ive had too many sneaky failures on final grinding to trust an 'open' to atmosphere weld. You don't need to knock cr*p out of a billet to weld it, just set the weld as you would normally forge, then give it a soak, and go at it! If the conditions are right it will pretty well weld itself. I dropped a billet once taking it out of the forge, and it all stuck together hitting the floor
  7. Its a sweet looking little anvil! - @Alan Longmire - Dudley is in the Midlands of the UK, not anything to do with Sheffield in Yorkshire! - Its the equiv of me confusing Canada and USA in terms of winding the locals up
  8. It looks like its got a forge stiffy When I mow though my other 200 unfinished projects Ill give this a try, Ta!
  9. Great you are healing well, and no horrible infections. Thanks for the update, I occasionally wondered how you got on! - you will be back to new normal in no time. I visited a factory once a few years ago to collect a job, and their van driver / labourer had no hands, just stumps. I watched him load a van with fork truck, and somehow do the ratchet straps up. I had a real good think that night that some of my life excuses for not getting stuff done were really not valid! I'm sure the chap would have been financially better off staying at home on welfare. Strong man!
  10. Sounds pretty crazy construction! If you know you can do it, you can. I've only made 1 sword, I just suddenly had to make it - and I did (12 years ago now) No way on earth I should have been able to make it with my skill set, but it just kinda emerged from the fire Not sure if the link below will work to take you to the instagram post, if not look up @non_jic and scroll back a lot on my feed if you want to see it. 10 bar construction. Funny thing is, i've not really wanted to make one since, even though I periodically find that one and cant believe I made it. I realise now, having handled other swords it needs to loose a bit more weight on the grinder, but the muse has not returned yet. Go for it! https://www.instagram.com/p/Bn9liUXgJ_d/?utm_source=ig_web_copy_link edit... I would leave the Ni out of the billet on an edge wrap. If you don't set the weld perfect, first time, no messing, I have found it will not stick whatever you do. I still mess up san-mai with pure Ni barrier in it. And your Ni would be very exposed to oxidation on an edge wrap, not saying you can't, but it would be tricky for sure!
  11. Crikey! hope you are healing up OK. That's a horrible accident. I wear a heavy cotton boiler suit when I work, I will be very careful to keep my sleeves pulled up when grinding from now on. Ive had a finger end dragged in before and that was bad enough.
  12. of course! chase the crack out and make a smaller blade You wont feel satisfied, and will have to start again though!
  13. If was forced to hand forge it, my starting billet would be 4" x 1.25 x .75 thick. With a bit of loss I would hope to get a decent sized blade from this stack.
  14. Glad the pointers were helpful! I have spent a lot of time chasing down the nuances on this type of blade. One thing I have come to accept now is you know in your heart of hearts when a blade is off to the scrap bin! there is a point its no longer worth working on it I usually kick off with a big billet, power hammer it down to a piece of stock, say 1 3/4 x 1/4, then hand forge it from there.
  15. Hope you are well Alan, all good in damp south Manchester! - i'm still not back to making as much as I should, but getting the odd bit of making time when the stars align! Easy to forget the things we do like soaking, if you do it without thinking about it! Wrought over high carbon is not an easy mix at the best of times as they do like to pull in different directions as they cool if they dont get a few mins to get to know each other in the forge
  16. as an addition, and I am probably teaching you all to suck eggs..... but i've found soaking the weld after setting it makes all the difference to it holding together without delaminating for further operations like drawing out. Set the weld solidly, put it back in the forge at a good welding heat for 4 or 5 mins before you think about hitting it again. (back when I used to be allowed to smoke, it was a smoke and a bit it just sat there in the forge!) I twigged how much stronger 'soaking the weld' made it when playing with mosaic feather patterns. No soak = failure. Soak = happy days forging against the welds.
  17. That looks like a hard way of doing it! I'm not sure I could get that to stick clean in a gas forge without a big brutal power hammer. More power to your elbow for trying! If you are going again, i've had good success stacking up a clean 3 layers, say 5/16" cladding - 1/4" core - 5/16" cladding. You loose cladding to scale so it all balances out by the time you are at blade profile! If you try with any thinner stock than this you cant really put enough reduction into the stock to ensure the welds.
  18. I do quite a lot of wrought iron 'san mai' for my chefs knives. I cant recall how to upload pictures, but you can see examples on my instagram account ' @non_jic ' I forge very (very!) close to finished dimensions, down to a couple of mm, or less at the edge. This gives just a 'wipe' of core steel showing. I heat treat before grinding in the bevels (the profile is tidied up on a belt grinder before heat treatment) There are a few things I have found I need to do to be successful for a straight and true blade forging this close to finish - any warps or twists in heat treatment and the blade is junk. -If the bevels are not forged in evenly it will warp in heat treatment. -After hot forging I perform a full anneal. -After anneal I quite aggressively cold forge the blade to improve the surface condition - you can spend as long as it takes to make it look like a finished blade cold forging! -After cold forging, I Normalise the blade at least 3 times, reducing the temperature slightly each cycle. I hot stamp my makers mark on the 1st normalising heat. -The blade will warp a bit on each normalisation, and may need to be tweaked back true (cold) before the next cycle. Eventually it will 'settle down' and stay true. -Quench from an accurate temperature, into a commercial quench oil. Im sure there are quicker ways of doing it than my procedure, but I have got good consistency now and hardly ever 'burst' a spine etc! Forging this close to finish minimises the grinding time, but you need to go very slow with the grinding to make sure the core stays in the middle, its very easy to push it all off to one side. I often have to 'cheat' and reduce the depth of the blade by a couple of mm, and regrind the bevels in so the core is centred.
  19. Nice work, I built the same vertical HT forge about 10 years ago and never solved the temp gradient problem, so side lined it. I still have it and will probably make a long forge out of it when I get the rolling mill re-built.
  20. Would the outer faces of your blade not just be 1095 though, so you would mask quite a bit of the interesting stuff with mono-steel?
  21. good effort to take it as far as you have, but I think you know the answer! It looks too thin and wobbly to my eye. Ask yourself if you would be happy to see it again in a few years with your name on it? Even starting with thin stock, like you have, the tang transition is better 'bumped up' in forging to .160 / .200" where it enters the handle.
  22. go for it! Ive not done that much twisted patternweld, but if it makes a creak noise stop and re-heat!
  23. That may well be an option going forward! - Ive had people asking for power packs without the press as well Re the tonnage calc above, in Europe we work on 2240 lbs to a ton, so the Coal is sub 8 metric tons. Ive got some nice photos of the Massey '12' first batch in work, I've put them on instagram (@non_jic) - Ill post them up here soon. Im too tired to remember how to do it now! wife has the covid so cant do the school runs etc, so Im doing Daddying from shit o'clock in the morning - work for a full shift, then daddying to fall asleep time. grrrrrr
  24. I jump as many grits as possible. I regard each successive grit as only removing the 'ridges' from the previous one, not grinding 'virgin' steel, just knocking the ridges off. I dont see the point in doing this progressively. I don't get on with 24g belts, but never tried a quality one, on a suitable machine. 36g ceramics sometimes. I generally go 60 / 120 on the belt grinder. Its only a couple of passes at 120 to move the ridges from the 60 grit. All the work is done with the coarse belt. I then hand sand (or use a wet stone grinding wheel, but that's not relevant to this conversation!) A 120 grit 'hand sand' is a totally different finish to a 120 machine belt finish. The trick to efficiency for me is getting it 'true' and accurate with the coarse belt, everything else is a finishing operation, 120 machine grit is a couple of passes, and if your accurate, hand sanding takes no time at all. (ie, not chasing a wobble out of it for hours hand sanding)
  25. Knives look great (beautiful) - I'm in the camp that the edges are probably too flat for general purpose board work on 2 of them. (chefs are fussy buggers!) I played around with lots of edge profiles, and the ones that seem to work best are similar to all the popular and well regarded Japanese and European blade shapes (production and custom, they are similar). My opinion is they evolved over hundreds of years to that shape, as that's the shape they work best.
  • Create New...