How Annealing of Steel Works – Subcritical vs Transformation Annealing

Discussion in 'Shop Talk - BladeSmith Questions and Answers' started by Larrin, Jun 10, 2019.

  1. Larrin

    Larrin Gold Member Gold Member

    Jan 17, 2004
    milkbaby, hugofeynman, Mo2 and 7 others like this.
  2. DeadboxHero

    DeadboxHero Triple B Handmade, Custom Knives Knifemaker / Craftsman / Service Provider

    Mar 22, 2014
    This is a great subject. It is very curious how prior set up before Austenizing plays a role with performance after HT and going deeper with how the annealing works is acutually a "dark horse" topic.
    Nick Dunham, shqxk and DevinT like this.
  3. DevinT

    DevinT KnifeMaker / Craftsman / Service Provider Knifemaker / Craftsman / Service Provider

    Jan 29, 2010
    Annealing is more complicated than other areas of heat treating and there is less information available. Great subject.

    Nick Dunham, Larrin and shqxk like this.
  4. Larrin

    Larrin Gold Member Gold Member

    Jan 17, 2004
    That's true, annealing is kind of taken for granted.
  5. Willie71

    Willie71 Warren J. Krywko. Part Time Knifemaker Knifemaker / Craftsman / Service Provider

    Feb 23, 2013
    This is very helpful. I need to read it again. Not my favorite article, but still very good. I never felt I really understood annealing. So much to learn.
    hugofeynman likes this.
  6. Tenebr0s


    Jun 3, 2012
    Larrin, thanks so much for writing these. It's become almost gospel in the internet knife world that you should never ash/vermiculite anneal a hypereutectoid steel. If I'm understanding DET correctly, then ash cooling a hypereutectoid steel will work for spheroidizing as long as the correct austenitization temperature is used?
  7. Larrin

    Larrin Gold Member Gold Member

    Jan 17, 2004

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