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  1. Dan_the_DJ

    Leaf spring making from mild steel?

    I dont use coal though. Im working with charcoal, cause I can make it in bulk, or just buy it if Im feeling lazy. I could try coal, but its a bit more of a hustle for me, and If I change fuels, Ill change to propane, way cleaner in my opinion. Charcoal served me great so far, Im experimenting with forge welding next, which might prove difficult with charcoal, but should be doable... The spring was a success by the way, its a bit sluggish, I might replace it with a proper steel spring sooner than I thought. But I need to complete and fine tune some of the lock parts to see if its usable or not. I forgot to bring my lead and sand box for tempering, and by the time I remembered I needed them, it was already dark, so I winged it and used the same method mister Gussler used in the video, with a hot plate. It worked like a charm! Thanks everyone for the help again, couldnt do it without ya! P.S. Plaster crucibles release sulfur fumes when left in the fire for that long. I learned the hard way...
  2. Dan_the_DJ

    Leaf spring making from mild steel?

    I understand, its just, I wanted to try making it this way, just for the sake of it, to see what happens, I will make a proper spring from some high carbon piece of steel when I get the chance. And you are absolutely correct that Mr Gussler wasnt using case hardened springs, they are made from "imported spring steel" as stated by the narrator. A reference to the old days I guess, when people from the colonies imported that stuff from Europe. Its hard to get commercially available steel in my country, I have to find a dealer who will ship it to me from abroad, and most of the times they either dont do that, or the shipping plus taxes makes the trade not worth it. Or they just dont have what I need in stock. So Im pretty much stuck using mystery steel all the time. Thank you for your help, cheers!
  3. Dan_the_DJ

    Leaf spring making from mild steel?

    Im not sure I understand what you described here... Again, Im not a native English speaker, so bear with me. The other things I understood quite well, thank you for the help. I am too making this as I go along, the only measurement I have is to fit the thing in the lock when its finished. Cheers!
  4. Dan_the_DJ

    Leaf spring making from mild steel?

    Im sorry, English is not my native language, and my terminology is all wrong. I meant making high, or higher carbon steel out of that piece of mild steel. And Im quenching right out of the crucible, while the steel is still red hot from the carburising process. It saves me a step of reheating. By spring steel, I meant steel that is spring tempered I believe its the term? Usage wise, the spring Im making is for a mainspring of a musket, and I would very much like to know the Sn to Pb ratio for this kind of spring, If youre familiar with that. Sadly, there is no blacksmith community anywhere near me, its a frowned upon craft in my general area even, dont get me started on that, its that sad Thank you for your help, I will do some more research on the forum tomorrow. Im reminding ya all this is but an experiment, I will eventually use a proper spring steel for this purpose, I just want to go about and try to make it this way, compare the results later. Im so sorry, Ive read it now. Hope everything is alright? P.S. Ive just learned how to do multiple quotes in one answer, sorry.
  5. Dan_the_DJ

    Leaf spring making from mild steel?

    Yes, Im familiar with that method, we even talked about it briefly at my university. In fact, that might be the reason I even tried messing with this in the first place... Hours, I dont know how many would the spring need, Ive been using this only to case harden some throwing knives and spikes made of rebar. But as you said, plaster tends to degrade, so I make it a bit thicker, that way it can withstand about an hour with no visible cracks. I havent soaked anything past one and a half hour, because there was no need, was working with very small or thin parts, 15x20x6mm for the lock parts and I only hardened the pointy end of each knife. Now, I dont know how deep the carbon diffused into the metal, but for those parts, it was good enough, I need to check that next time... About the lead, yes, I was referring to its boiling point, in this video, the gunsmith uses boiling lead, to evenly heat his springs and then quench in oil, after he proceeds to temper them on an iron plate over the coals... heres the video About that boiling point though, I guess he just eyeballed it, I mean, the whole thing is eyeballing it from the start, he says it himself. I guess having tons of experience helps too Lead is extremely toxic, I know that much, Im having trouble being near it when its only molten, let alone boiling. Dont worry about that, Im doing it in a special place, with lots draft and open space. I have read some articles regarding gun spring rempering, but still, lead or tin just feels like the easiest thing to do, not to mention it cant catch on fire, we dont want that! I will get banned from forging altogether I could try that pan of sand, Ive seen another video where a guy takes a pan and fills it with brass filings to heat blue a set of clock hands, the color was phenomenal. Thank you for your help, I will post my results, if there are any. If not tomorrow, then the day after, cheers!
  6. Hello everyone, Ive been fooling around with some mild steel scraps I had lying around. Been trying to make steel out of them, by case hardening I believe its called. Well, Im not really sure, if its true hardened, could it still be called case hardening?? Anyways, it turned out successful so far, for my need of making a few parts for my percussion lock project, dont know the exact terminology... I reached the point where I need to make the big spring for my lock. So Ive been thinking, since my angle grinder is toast at the moment, and it would be a pain to saw through an old truck leaf spring by hand, could I make a spring by case hardening mild steel? I shaped and polished the thing, put it into a nice little box made from scrap rusted iron plates, filled with charcoal, flour and salt mix, and sealed the whole thing with plaster of paris(Its a little tricky, but it worked fine for me so far). While Im waiting for it to dry, I was wondering, what are your thoughts on this? Has anyone tried making a spring this way? Also, when I do indeed make the spring, be it from this project, or from a decent piece of spring steel and quench it, I would need to temper it of course. And since I had, lets say, a few unfortunate situations with the kitchen oven and not the best of luck with color tempering, I wanted to try a different method for my temper on this one. I recently started learning soldering, brazing and all that fun stuff, so It occured to me to try and use some of those solders as a tempering medium. Different alloys of lead and tin have different melting points, so In my head, I figured, I can heat up this mixture, and as soon as it melts, I drop my spring in and then just keep it there, maintaining the temperature as best I can. But, given that stuff is rather expensive to buy in quantities I need, I wanted to know if using pure tin or lead can cut it? Pure tin would be to my understanding too cold as a medium, with a melting point of 232c/450f, it might be fine for knife making, but no bueno for springs. While Im at it, would pure tin, or something else with that similar melting temp be good for tempering knives? It would really mean a lot, given Im banned from the kitchen now, and I really suck with tempering by color, and I dont really trust it to be honest. Pure lead on the other hand, melts at about 328c/622f, so that might be a bit too much for me? I really dont know, I have no clue, been searching the net for a while now and I found out that lead is used to heat things up to critical temperature, prior to quenching, but I wanted to ask if someone has experience with using tin/lead alloys for tempering? I hope you can separate some time to answer these questions, I want to know if its worth it wasting time on this case hardening, and more importantly to me, using tin/lead for my tempering... Thank you all, have a nice day, cheers!