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I Forge Iron

Quenchcrack

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Posts posted by Quenchcrack

  1. I will be setting up the new forge this weekend and will take a few pictures. You can see photos of the forge (2 burner Blacksmith model) at the Diamondback Forge Website. He also has some videos of the forges in action. I was unsettled by the recommendation in the set up booklet that the forge be put on top of refractory bricks due to the high heat. I haven't found a retail supplier of refractory bricks yet but I will work something out.

  2. Got my new 2 burner Blacksmith forge today. Looks well made. I won't get if fired up until Saturday, though. Yes, I watched his videos but I have a ball valve on my Whisper Baby and only use it to turn it off and on. Not sure I would remember to flip the leaver on every heat.

  3. OK, 103 miles north of Houston, about 2 hours. Closed on Mondays I guess. I got there at 9:30 AM and it was closed so I went on to my appointment in Shreveport. On my way back home I stopped by about 4:30 PM and it was still closed. Just inside the chain link fench was exactly what I wanted to buy: a rivet forge and blower. 10 feet from my fingertips! Yep, he has a LOT of stuff that he apparently is in no hurry to get rid of.

  4. Actually, Volume 9 of the Metals Handbook, published by ASM, states that nickel alloys up to 96% nickel can be readily etched with a mild mixture of HCl and Ferric Chloride. I would assume A203 would respond quicker than, say Nickel 200 or 270. I thought Ferric Chloride was the etch preferred for etching pattern welded blades? As for theW2 having no nickel, thats true. But the A203E and the W2 must have the same carbon content due to diffusion and the carbon is what gives color to the etch. So if the carbon content is now uniform, and the nickel does not pose a serious resistance to etching, where do the light and dark bands come from?

  5. Carbon does not diffuse into or bond with nickel as it is not a carbide former, but 204E is not nickel , its a steel alloy that contains some 3.5% nickel tho, there is a difference.


    OK, the 204E is not nickel, it is a low carbon steel. That means the carbon will diffuse into the steel part as you state. After forging it has the same carbon as the W2 (which is now lower since it is donating steel to the lower carbon areas). So if the nickel is substitutionally alloyed into the 204E it will be randomly and uniformly distributed throughout the iron matrix, not in bands. If nickel and carbon are randomly dispersed through the 204E and carbon is the same as the W2, what causes the light/dark bands?
  6. OK, I need Jim Hrisoulas to explain this to me. The use of acid to etch a metallurgical specimen dissolves the IRON and leaves the CARBON replica in place. High carbon areas etch dark and low carbon areas etch light. If the carbon diffuses and homogenizes, what causes the banding? Microstructure? Pearlite is iron carbide in a ferrite matrix and it etches dark. Ferrite has basically zero solubility for carbon so it etches light. But in a pattern welded blade, the carbon content is the same all over so there should be no inhomogeniety in the iron based structure. It should all etch the same. And if the carbon diffuses into the Nickel, why does the nickel still etch white? Inquiring minds want to know.

  7. Key, so the ball valve is either all the way open or shut down completely? And the needle valve trickles gas to the forge? Why can I not do it like the DB valve does? He has a set screw that can be adjusted to allow the valve to be full open or partially closed back to the same position as per the placement of the set screw. I guess I just don't know why you need the needle valve. Please explain this as we don't want accidents.

  8. Interestingly, my Whisper Baby has an idler valve on it and it is 8 years old. It is a standard WOG ball valve and it is used to adjust the heat in the forge. I occasionally use it to idle the forge. I think I can buy one of these at the local Ace and rig up a way to mount it for a few bucks. I am looking forward to being able to heat steel up to a temperature beyond a bright red. Maybe my arm will not be so tired at the end of the day. But then, I might just confiscate the idler on my WB and put it on the DB. They build a Z-buner for the WB. Yeah.....

  9. If you cannot control the cooling rate in your forge, heat a heavy mass of steel along with the H13. Put the heavy mass in the ashes/vermiculite/kaowool or whatever you have below the H13. Cover them together and let the heavy mass keep heat in the H13 longer than just letting the H13 cool by itself.

  10. One of the problems with copper and iron is that copper will literally melt into the iron grain boundaries and cause it to fall apart. This is called liquid metal corrosion and is why smiths generally do not mix copper and iron. Note that many tanks and anti-tank aircraft fire sabot rounds made of copper. Upon impact it is liqufied and it eats through the armor. What happens inside the tank is not pretty.

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