File knife question

Discussion in 'Knives, Swords, and other bladed weapons' started by 4foruglenncoco, Nov 13, 2013.

  1. 4foruglenncoco

    4foruglenncoco Member

    When heating and hammering a file knife, do u need to heat treat it after.
  2. dolomite

    dolomite Banned

    As far as I know, you shape it with an angle grinder, not heat and hammer. Never made one but I think I remember TP(TysonsPapa) saying something like this, maybe ask him-hes a real cool guy and very helpful.

  3. 4foruglenncoco

    4foruglenncoco Member

    I was talking about doing something like this

  4. Tilia

    Tilia Junior Member

    blacksmithing vs stock removal

    stock removel is easyer, blacksmithing is cooler... IMHO

    anyway in both cases you'll need a heat treatment to get a good hard jet not bridle knife
  5. pelleteer

    pelleteer Middle Aged Delinquent

    Yes, your blade needs to be hardened and tempered, whether it is made via forging or stock removal. There are many online resources to choose from, but this page gives a good, simple look at basic heat treating: :cool:

    edit: You also can't just use any old scrap steel. The steel needs to have enough carbon or enough other alloying elements to be heat hardenable. For example, most strips of steel you can find at the local hardware store in the USA are A36, which is a junk steel (made out of old melted down bolts, etc.) that's suitable for making other things out of, but not knife blades. Make sure you select a cutlery steel like 1075, 1095, etc, or 440C and the like if you want stainless. If you're located in North America, check out Admiral Steel for suitable blade steels. They have good prices on various sized pieces of steel.

    edit 2: Here's their catalog with sizes and price list:

    Yet another edit: I vegged out on the file part of your question. You'll probably want to anneal the file before you do anything else with it. You can do this by heating it up to non-magnetic and then sticking it in a bucket of sand to let it air cool (overnight is good). I've read that if you don't do this it can shatter during forging. The heating up for the forging process is apparently not enough.
    Last edited: Nov 15, 2013
  6. KarlGunsmith

    KarlGunsmith New Member

    You are quite correct sir. I have seen it happen. ONCE...that was enough.
  7. Tysonspapa

    Tysonspapa New Member

    Agree with peleteer and tilia.
  8. AvB

    AvB New Member

    its hard to stay calm, wenn i see videos like the one above.

    this maybe will not help the initiator of this thread, but for those who can read german, i recommend

  9. nuk

    nuk New Member

    Yes, you sure do....

    The problem with a file can be: unknown steel.

    After much heating and hammering in a forge there is much stress build up in the knife blade. So you have to heat the knife blank and then let it cool off SLOWLY, you can use ash for this.

    Then you have to harden the blade and after hardening you have to temper it. As the correct temperatures are very important by each steel, you have to know the steel where the file was made out.

    gr, Jan
  10. Triphammer

    Triphammer New Member

    You're in S. Cali. it looks like. Go to a flea market or yard sale & find an old file thats marked eith "Black Diamond" or Nicholson". That's your garantee of quality steel. Give it a heat to non-magetic (About orange) and let it cool slowly. If you've some camp fire or wood stove ash poke it in that while hot for an hour. Grind of most of the file teeth, they'll cause stess risers later. Now you can heat & beat to your hearts content. once you have about 75% complete heat to yellow or a little brighter & quench in warm salt water (Brine). put in in the kitchen oven @ 350 for a couple hours take it out , finish grind & put a handle on it. It'll be your first forged blade of probably many. (Forging bladesmithing is at least as addictive as slingshots).Sharpen & enjoy. If it's not what you want. Make another.
    There is a literal ton of info on DIY blade smithing & heat treating on the net. ENJOY!!
    Last edited: Dec 9, 2013