Bo T

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About Bo T

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    Senior Member

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  • Location
    Washington state
  • Interests
    I have recently become interested in blacksmithing and knife making as hobbies.

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  1. The dry ice cold treatment is sometimes used to help convert unconverted austenite(RA) to martensite. I am not sure how much RA would be left in quenched S7? I am not sure how much help cryogenic (liquid nitrogen) treatment would help with S7 either. I have some reading lying around somewhere, but the scientists doing that work are probably +/- 10 F on their temperature control. Not necessarily applicable to the present situation. Note: mix your dry ice with acetone. That should get the temperature down to @ -100 C.
  2. As noted, new anvils are becoming a good deal; the farrier anvils, Rhino, etc.. A person can get a good 70# anvil for @ $300 shipped to their door.
  3. I checked CL and found a number of carports for sale. You could mount it on skids (non permanent) and use tarps to shield the sides.
  4. On the main menu, just below the general blacksmith discussion, there is a section dedicated to anvils. You might get more responses there. Also seems that pictures are appreciated.
  5. Your Vulcan should serve you well, so you don't need to be in a hurry. If one shows up in your back yard, factor in the travel expenses and time savings. You spent an entire day and drove? And too no avail. (I've been there and done that). After chasing my tail for a while, I found one that I was able to pick up on the way home from work. I passed up a lot of good anvils due to the time/distance cost. You might get a few hundred more dollars and wait until one shows up nearby. Also, there are a lot of good to excellent cast anvils out there (ductile iron and cat steel). So I wouldn't let that determine which you buy.
  6. You can try increasing your temperature above non-magnetic. Take it to a uniform color a couple of shades brighter than non magnetic, then quench. If it hardens, temper immediately. If it doesn't harden, take it a couple of shades brighter yet and try again. Good luck and let us know how it turns out. Also, are you getting the file below the decarb?
  7. Down here a lot of power is 15A, 110v. So 1.5 hp would be tops. If you have 220v, then you could run a more powerful motor.
  8. Forgot to sweat the details. Any other exceptions?
  9. I set a 8# sledge into concrete and beat on that for a while with no ill effects. You can take one of your pieces and set it in concrete to height and you will have a real good anvil for bladesmithing.
  10. Pretty interesting. You might cut off a few ounces and work with it. 50 or 60 points of carbon will make a good knife. Up until the last half of the 20th century hard/ultra hard knife blades did not become that much of a marketing issue. Let us know how it turns out.
  11. Thanks DanielC, I sent an e-mail to Jeff. Unfortunately, Fire and Brimstone is on the other side of the country and I am (at this point) lacking in time and disposable income.
  12. ThomasPowers, The cost argument is a good one as one can get several pounds of exceptional steel for the cost of making a single crucible. However, the direct conversion of ore in the crucible controls some of the variables that occur when smelting ore > steel in the furnace. For example; better control of the reduction process resulting in a more uniform composition of the product. Also, I am not sure that the cost would be that much more than building and running a backyard smelter. It seems, to me, the main difference is the cost of the crucible. Dr. Feuerbach has an amazing thesis. I have had the opportunity to read a portion of it. I have also reviewed Ric Furrer's video. I am aware of some people around here who have smaller furnaces capable of melting cast iron for a pour. Such a furnace should be capable of heating a crucible to make steel. At this point the discussion is still academic but very interesting. DanielC, Yes, and thank you.
  13. Ah, so your references will deal with the reduction of the ore in the crucible? I noted the pig iron process as that is similar to what I have been able to find. And, I am not really interested in it as it seems horribly inefficient but successful. There was some reference to a 'west hill process' from a millennia ago but few details. I'll check the Huntsman clue and your references. As for the current videos and information that I have found for hobbyists it appears to be - adding a little carbon to low carbon steel to make wootz. The one step reduction of iron ore to steel, which I am interested in, is conceptually very simple but as usual the devil is in the details.
  14. I am thinking about a batch process where the magnetite is reduced in the crucible. The carbon would be used as the reducing agent and as an alloying element. the result should be steel, could end up as cast iron or half baked magnetite. I'll check the video to see if I can glean info from it. I did download a paper where the process was used on pig iron.
  15. I was at a hammer-in last year where I talked to a gentleman about making crucible steel. He had a large quantity of magnetite of high purity. During the process of refining the magnetite, how much carbon is needed? Is the carbon oxidized to carbon monoxide, carbon dioxide or both? We were talking about a steel @ 1% C.