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I Forge Iron

John in Oly, WA

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Posts posted by John in Oly, WA

  1. That Red Devil stuff is mortar. Meant to use between firebricks for setting them. Generally doesn't hold up to direct flame contact. You want something like Kastolite 30, or Mizzou castable refractory.

    As for rigidizer, or shopping for anything online, search, search and search again. I've found prices vary widely(wildly). I've found a gallon of rigidizer for $32US and the same gallon of rigidizer at another location for $102US.

    Another time I was looking for a coil for my go cart. One online source had the coil, spark plug and CDI for $11US. Another source, just the same exact coil for $125US - claimed it was high performance.

  2. So mild steel IS a mystery metal? I will keep that in mind. My apologies Steve. I just figured I had mild steel and using an electrolyte for mild steel, then that wouldn't be where the problem was. I have some 1095 and 1084. The electrolyte specifies it's for high carbon and mild steel. So I'll continue the experimenting with that.

    MC - I was just looking for a bit deeper etch and then the blackening effect after.

  3. No, not exactly correct Steve. I said mild steel, with A36 as a question mark only because some posters on IFI have said that it's possible when people buy mild steel, they may get A36. But what I could find about A36 designation, is it might have some manganese along with the low carbon and some minor amounts of phosphorous, sulphur or silicon. But, then mild steel can have manganese in it's composition as well, so either way, it's mild steel. When I bought it, I asked for mild steel. Is mild steel a mystery metal? Then I mentioned I used an electrolyte designated for carbon and mild steel, which is most likely appropriate for the application. I don't think that's where the problem is.

    My focus is on the process, technique, amperage, maybe the circuit design itself. Thanks for relating your experience Kozzy. My investigations confirm your experience that it has to be wetter than I was keeping it. It needs to pulse the current (didn't build that in to the circuit unless the rectifier in converting the AC causes the DC to pulse), so lifting the pad every 3 seconds helps. And don't press the pad down as hard as I was doing.

    I'll continue experimenting with it.

     

     

  4. I put together a little electro etcher. Tried it out on some mild steel (A36?) with electrolyte specified for carbon and mild steel. The results were less than I was hoping for. I was looking for a deep etch and then blackening after. I'm wondering why the etch wasn't deeper and it didn't blacken at all. Maybe my pad was too small for the size I was etching? Not enough current? My technique needs work? Or just expecting more from the process than is realistic?

    Etcher.jpg

    EtchAttempt.jpg

    electro-etcher_circuit.pdf

  5. 6 hours ago, ThomasPowers said:

    "May be two different things." (Most often are...)

    Funny, I thought that right after I posted it. And then thought, yeah, most likely anyway, rare would be a propane forge with forge welds.

     

    JHCC - I would, and have, just fired them together. According to the info that came with my gallon, it develops a ceramic bond at 1600F. But then how deep will the heat of your forge penetrate the wool to 1600F? So how thick of a ceramic bond will be achieved? I don't know. And I haven't cut my forge apart to find out, so take my advice with a grain of salt (your choice what type). My scraps became rigid and bonded together sufficient to resist sluffing of fibers without any firing.

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