Call for Charpy toughness samples

Discussion in 'Shop Talk - BladeSmith Questions and Answers' started by Larrin, Jan 26, 2018.

  1. Willie71

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

    Feb 23, 2013
    Probably much like my portable Rockwell tester. You have to be careful and use it correctly, or your results won’t be any good.
     
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  2. hugofeynman

    hugofeynman Gold Member Gold Member

    595
    Jan 18, 2011
    Can’t wait for Ultrafort charpy test! Do you think this alloy (or any other Maraging steel) can make a good chopper (not a slicer)? On theory, it can reach 60hrc and has the toughness of 4340... what’s your opinion, Larrin?
     
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  3. Larrin

    Larrin Gold Member Gold Member

    Jan 17, 2004
    I assume the toughness will be very high.
     
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  4. Tin.Man

    Tin.Man

    834
    Sep 5, 2010
    Maybe I missed it but was 80crv2 ever on the chart?
     
  5. Larrin

    Larrin Gold Member Gold Member

    Jan 17, 2004
    It has not yet been tested.
     
    Tin.Man likes this.
  6. Willie71

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

    Feb 23, 2013
    We are waiting for the samples to be ground to final size. We have 5 or 6 different heat treats for comparison.
     
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  7. Tin.Man

    Tin.Man

    834
    Sep 5, 2010
    No worries I just hadn't checked in a while.

    Another month or so I'll be able to surface grind some samples for you guys!

    Any chance you can sticky this Stacy? I appreciate it!
     
  8. Salival

    Salival

    72
    Apr 9, 2014
    Hey people, this thread can't stay at page 13!! It breaks my hearth :D

    Any update from new runs Larrin?
     
  9. Larrin

    Larrin Gold Member Gold Member

    Jan 17, 2004
    Hopefully you've read beyond page 13 since it goes to 53. :)
    There have been slow and steady additions that are posted to the website but I haven't posted everything in this thread. I found a good machinist to do a giant batch of steel that came from Warren. I have two batches of samples I heat treated out with two people who have been slow but I think will eventually machine them. I believe there is another big set from Warren at Alpha Knife Supply. Once all of those sets are finished the majority of what we wanted tested will be complete. I have several different low-alloy tungsten steels that I will need to heat treat and machine myself probably and that's about it. Then in the future it will probably be smaller sets to look at individual steels or specific heat treatment parameters.
     
  10. kdnolin

    kdnolin Basic Member Basic Member

    157
    Jan 16, 2017
    I was just wondering myself, if there were new samples tested. Thanks to all who have been donating time and materials for these tests.
     
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  11. Willie71

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

    Feb 23, 2013
    I haven’t heat treated anything more in the past few months. I will get started again once the grinding gets more sorted out. I have 1v, S7, nitro v, more 52100 conditions, S90v, more M4 conditions, 1085, 440c, 440b, and some 26c3 heat treat experiments.

    I’m also going to do some 1080/15n20 Damascus pieces out of curiosity, with different layer counts to see if layer count affects toughness.
     
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  12. Larrin

    Larrin Gold Member Gold Member

    Jan 17, 2004
    Surface grinding is definitely the limiting step at this point.
     
  13. Salival

    Salival

    72
    Apr 9, 2014
    Great! I'll take a look on your website.

    Thanks guys for your efforts!

    PS: by page 13 I meant, that the thread felt down at it, in this section.
     
    Willie71 likes this.
  14. hugofeynman

    hugofeynman Gold Member Gold Member

    595
    Jan 18, 2011
    Hey, Warren, do you already have heat treated A8mod and S7 coupons? Can’t wait for the results on these two!
     
  15. Larrin

    Larrin Gold Member Gold Member

    Jan 17, 2004
    Nevermind about the good machinist I found. He said he can't do them.
     
  16. Willie71

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

    Feb 23, 2013
    a8mod has been sent. S7 is on my bench. I have to refill the LN. Probably won’t get to that until after Christmas.
     
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