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I Forge Iron

John Martin

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Posts posted by John Martin

  1. I swear by my diamondbackironworks forge. It's a two burner knifemaker. Forge at around 4psi, and weld at 6-7psi. It should be your last forge that you will ever need. However, I have never used a chileforge, so I have nothing good or bad to say about them other than that a lot of people who have one like it.

  2. My bladesmith teacher that I am learning from, has a small one burner gasser that he can use for differential results. He will heat the spine up, and then take the air hose and blast the knife but the blade area, hits the spine, tang, everything. It reaches about 45RC that way, then lets it cool. Then heats up just the edge area and quenches. We did that on my last knife. Edge area 62RC, middle of blade 53RC, spine 44RC. Thought it was a pretty cool trick that works, and gives you the spring steel, and hard edge.

  3. We are heating the steel with a 7"x7"x12" gasser that we are building right now. Our press.... Welding process will be top and bottom, 1/2" spacer in between 100% with 7018 which is the correct rod for 4140-A-36. Weld around, chip, weld around chip, etc... We are also going to be building a HT furnace similar to the 55gal drum one this summer later on as well. Then we'll do the cascading water just like they did in the old days. Then we'll temper in HT furnace, and take to a friends for rockwell testing and milling of the face and machining.

    Edit add-on:
    If this doesn't work, then we will keep fixing our problems until the first anvil is satisfactory, and then move on to the next one. This is going to be a long and challenging project, but we will take it one step at a time, and overcome each problem one step at a time. If anyone is interested, we will be documenting this.

  4. Wow, my friend and I are going to make an anvil this summer, actually probably down by the end of June. Anyhow, there are so many designs with so many different features. Our anvil is going to be in a top and a bottom, and then 100% welded at the waist. But to get to the point, I wanted to know fi you guys could critique our anvil design.

    We are planning on a 3" face, and 30" long face, and 14" tall. Total weight at 200lbs. Style kind of like a euroanvil. Minus and clip and upsetting block. The pritchel hole has been moved back, and we have added a drawing face to the anvil. It will help a lot for those who do a lot of drawing over the horn and are sick of the anvil bouncing, it also puts the full weight of the anvil below the drawing face. The hardy hole is right before the horn. We have already made a mini version from 3/4" sq stock. It was a lot of fun, and we learned a lot. Some of you might wonder how we are gonna forge the anvil. We are using a press...but from what I've said, can anyone critique it or improve it?

    Thanks in advance...

  5. Matt, no one is fussing over anything, this is merely an open conversation as to who likes what and why, I only posted the properties, so that people might learn more about the two.

    Yes, you're right, most people can't HT is as it's supposed to be within 10 +/- of the suggested HT range, but a lot of us can get really close to that. anyhow, do you have a preference?

  6. Which do you prefer for hammers, dies, heck even a homemade anvil, chisels, punches.

    Note: This is between just these two steels, for those of you who have H-13 for dies and what not, great, it's better than 1045 or 4140, but this is just between the two steels.

    Here are some properties of both...

    1045: Carbon 0.42-0.5; Manganese 0.6-0.9; Phosphorus 0.04; Sulfur 0.05; Tensile Strength 95,000 PSI; Yield Strength 56,000 PSI

    4140: Carbon 0.35-0.43; Manganese 0.75-1; Silicon 0.15-0.35; Chromium 0.8-1.1; Molybdenum 0.15-0.25; Phosphorus 0.035; Sulfur 0.04;
    Tensile Strength 140,000 PSI; Yield Strength 90,000 PSI;

    Right off the bat, it looks like 4140 is a better overall steel, plus it has more toughness than 1045, but price can sometimes stop you, so which do you prefer and why?

  7. Okay, before i get asked this question, yes I have used a power, LGs, but never an Appalachian style.

    My power hammer will have an 8" stroke. My question is, do I have to make the stroke adjustable or do the springs flex, but how do I make is so that I can forge let's say 4"(large knife billet) stock all the way down to 1/8"(finished width for blade) without screwing up the motor system and linkage?

    Do I have to make it adjustable? Because if I have to do that, that would really slow things down. Anyhow here are some pictures....

    Obviosuly, the first picture is it all the way down.


    This picture could represent a larger billet or working with hand held tooling.
    http://www.appaltree.net/rusty/images/super_rusty.jpg





    This might sound like a really dumb question, but i honestly can't figure this out. So how do I make it, so that I can forge different stock heights with this, or do I really have to make the linkage at adjustable heights on the wheel? I take it that maybe the linkage in the middle of the drive in the blue picture would do the adjusting?

  8. -Don't know if this should go with the "Dividing Workshop Space" thread or not.

    This will obviously depend on what kind of work you will be doing, but how big is big enough for a two person shop, that won't be doing large gates and items like that. The two people will be doing different work. One will be bladesmithing, while the other will be doing mainly artistic stuff, trinkets, small tables, small gates, blacksmith tools.

    The shop will have a clean room, for finishing and for tools/machines that need to stay away from the grit of the forging area.

    Does anyone share a shop with someone or forge with another person that could chime in? My friend and I were thinking 24x24 or 24x18. Is that to big? To small? We are gonna save up this summer and split the cost to buy one of those DIY kits. It is easily affordable if we both save up this summer. Also, this will be 20 feet from a river. The area for the shop has also been elevated 3ft. Higher than our record flood heights this summer. Will rust be a problem?

    So if anyone could chime in and give some advice about this it would be appreciated.

    Mods if this is in the wrong place please move it.

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