Cast and Forge

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    Saxony, Germany

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  1. I installed the burner in my forge today. The forge is probably too small for the burner but it worked out very nice. I started slow on the air and gas mix and cranked it up further as the forge heats up. A bright yellowish, nearly white heat was no problem! I just need to get used to the tuning to reduce scaling a bit more. Thanks for all of the replies. You helped me very much. Tim
  2. Thanks Frosty and Buzzkill for the input, I experimented with the burner todSee the picture below on my setup and my regulator. I think theres still a needle valve on the regulator. The blower is regulated by a power supply unit. I turned on the blower and tuned the burner to a bright and rich flame. Then I slowly reduced the gasflow. I just adjusted the gas, not the air. I tried this procedure with several air/gas configurations. But it seems that the flames wont stay near to the burner head, if I turn the blower up more to some point. See below the pictures of the blower configuration which will just hold the flames near the burner head. From there I turned down the gas to a point, where I cant turn it down anymore without the flames dieing. The flames are burning stable and quiet but are fairly small. I really dont think they can bring a forge to welding temps. So what are you thinking about this? Tim
  3. So I think you just pointed out the problem here. My gas inlet is a copper tube soldered into a fitting. I drilled 3 1.5 mm holes in the tube. I think this is way too muchafter reading your thoughts.
  4. Thanks Buzzkill! Dumb me didnt built in a baffle plate. I thought for such a small plenum it would be alright. I dont think i can get one in now without casting a new burner block. So how bad is this for the burner performance? Problem is my regulator is to rough. It shows 0 bar and i can still turn it down. But i dont know how much gas is going through. I will get a new one. I will test some more gas/air combinations tomorrow.
  5. 20191121_180550.mp4 Hey folks, See attatched some footage of my homemade ribbon burner. Iam a bit concerned about the flame being so far away from the burner block. The burner is also very loud. Is there anything I can improve? Did I do something wrong? 20191121_180550.mp4 20191121_180550.mp4 Thanks Tim
  6. Hey guys, I am looking forward to buy a 16 kg airhammer, similar to the "Anyang 33". One big questionmark is the foundation of such a small hammer. I've read that the weight of the foundation should be around 50 x the hammerweight. So this would be 800 kg. Is this formula ok? I would pour the foundation with concrete with steel inside. I am working in the garden with neighbours all around the shop. I am a bit concerned about vibrations from the hammer. Is it adequat to isolate the concrete block with some rubber mats from the rest of the ground or should there be any other steps taken to avoid vibrations to be transferred into the ground? Tim
  7. Alright guys, I successfully hardened 2 hammers I forged again. I followed the charts for material thicknes and heating time that I found and it worked just fine. I assume it was a thing of getting used to the different heating rate in my gas forge. The picture shows a hammer I made for my striker, He was in need of a good hammer at work for setting up machines Thanks again for your support!
  8. Actually Iam here to to get my mistakes pointed out so Iam not upset at all. Frosty the Lucky I actually found a formula that says for a unalloyed steel the soaktime should be 5 minutes for every 10 mm diameter/width and 10 minutes if alloyed. Thank you Irondragon Forge & Clay. It was intended as a hammer for my striker. "@" tagging removed.
  9. So I see what I messed up on the small part now. I hope the hammers will stop cracking if I get the soak time and heat management right. I guess all I can do is to forge more hammers and keep trying. Being on that learning curve is nice but also kinda depressing sometimes. Iam glad I singed up to this community.
  10. Thank you Frosty. That totally makes sense with the contact and radiation heating. Should have known that. So I will look for those charts and adjust my heating time. All hammer heads were allowed to cool down in the shut down forge after I finished forging. But no normalisation cycles between several heats or something. The cracks in the test piece for the guillotine still confuse me. Its a piece of 25 x 30 mm and cooled down in air for like 10 minutes before i dropped it in water.
  11. So gas heats slower? Is there a recommended time to let a piece of 45 x 45 x 100 mm soak in a proper working gas forge?
  12. Thanks Steve. Thats something I did not think about yet. I definitely keep that in mind.
  13. Hey Forum, I think I forged about 12-15 hammers from 1045 yet and in the last months I have massive problems with them cracking during the quench. Picture 1-3 is the first hammer that cracked during the quench. I heard 3 times the horrific "ping" sound and here you go with a big crack right through the eye. Picture 4-5 is a rounding hammer that showed the same kind of crack as the first hammer. I heared no sound of cracking. I cracked it completely open to examine the grain and the crack itself. After this hammer cracked I assumed that I forged the steel too cold when drifting the eye. So I forged the next little 0.9 kg hammer a lot hotter. I will heat treat it the next week I think. What really confused me is the piece of steel in the last picture. I finished my guillotine tool today and tested it on this piece. Just a couple of heats and some hard hits with the hammer. After I finished I put the piece aside and shut down the forge. When I came back it wasnt red hot anymore but still hot (black heat). So I threw it in the water bucket to cool it down. After I looked at it I saw this big crack right through the fuller grove. Iam at a point now where I dont know what to do next. Nearly every piece of 1045 cracks (Iam glad the guillotine dies did not). I forge everything by hand so its really frustrating to see the hard work going to pieces in the quench. Any tips/suggestions? Those hammers are the first ones after changing from solid fuel to a gas forge. Can there be any connection to this? Iam thankful for every hint. Thanks Tim