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Help me read the steel after heat & quench

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

  1. feister

    feister

    5
    Apr 23, 2013
    I have been working with mostly 1084 with .156 thickness. This blade is 1/4 inch 1075. I feel confident in my heat treat and quench in canola oil. My question to those of you with more experience is the color change and very distinct line along my beveled edge. What is it exactly? Is it good? Bad? Like I said, I have made a lot of knives in 1084 but they were thin steel compared to this and I have not seen this defined line along the edge like this before. Thank in advance for your answers.[​IMG]
     
    Last edited: Aug 10, 2019
  2. JTknives

    JTknives Blade Heat Treating www.jarodtodd.com Knifemaker / Craftsman / Service Provider

    Jun 11, 2006
    Need a picture, a line can be anything. That’s like saying when driving, your car is making a noise. “What is that noise?”
     
  3. feister

    feister

    5
    Apr 23, 2013
    [​IMG] I’m hoping the pic will come up this time
     
  4. feister

    feister

    5
    Apr 23, 2013
    Sorry, I must be doing something wrong. Having hard time getting a picture up
     
  5. feister

    feister

    5
    Apr 23, 2013
    [​IMG]
     
  6. DevinT

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

    Jan 29, 2010
    1075 is not a deep hardening steel, that is probably a hardened edge. Like a hamon. I’m not able to see your image though.

    Hoss
     
  7. Stacy E. Apelt - Bladesmith

    Stacy E. Apelt - Bladesmith ilmarinen - MODERATOR Moderator Knifemaker / Craftsman / Service Provider

    Aug 20, 2004
    The method of posting a photo is in the stickys. You can also email one of us the image so we can post it.
     
  8. feister

    feister

    5
    Apr 23, 2013
    [​IMG] I'm really hoping this works this time. DevinT my blade does look like a hamon but that was not the intention
     
    R.C.Reichert likes this.
  9. R.C.Reichert

    R.C.Reichert

    915
    Jul 26, 2008

    I get that when I edge quench my blades. The scale at the edge pops off in the quench and can leave a quench line. Looks normal to me. It's a nice looking blade you got there. Sooner or later some real experts will chime in on this though. I'm just a hobbyist after all.
     
    feister likes this.
  10. Storm W

    Storm W

    273
    Feb 19, 2019
    When someone says my car is making a noise you ask for a picture?:p
     
    Last edited: Aug 11, 2019
  11. Stacy E. Apelt - Bladesmith

    Stacy E. Apelt - Bladesmith ilmarinen - MODERATOR Moderator Knifemaker / Craftsman / Service Provider

    Aug 20, 2004
    That just looks like some scale and decarb. Sand/grind it clean after tempering and it should go away.
     
    feister likes this.

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