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Thread: gyuto , how it's made.

  1. #1
    Senior Member bryan03's Avatar
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    gyuto , how it's made.

    hi, a little WIP.

    the steel : 145sc .


    ready for forge welding :


    welded, and the hidden tang is forged out :


    after 2 heat session .


    and after cut, grind and so...


    now, the blade is ready for heat treatment, next sooon....


    bryan


  2. #2
    Senior Member bryan03's Avatar
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    ok, the blade is quenched in water....
    first grind 60grit


    120:


    JNS330


  3. #3
    Senior Member Matus's Avatar
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    Cool, thanks for sharing Bryan. May I ask how far to final grind you go with the 60 belt before you switch to a finer one?

  4. #4
    Senior Member chinacats's Avatar
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    This is very cool, thanks for the WIP!

    Trying to follow along in Gator's guide, would this be the same steel as 145cr5 (6)?

    Cheers
    once in a while you get shown the light, in the strangest of places if you look at it right

  5. #5
    Senior Member Matus's Avatar
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    If I may, the steel is SC145 (or 1.1590.01 and after further tweaks couple of years later the next batch was 125SC - also identified as 1.1563.01 - both steels were made for Aachim Wirtz). Once I am at it - I am not sure where the Si and P contents in the 125SC steel on the ZKnives are from, as it was me who gave Gator the composition of the steel (and I got it of course from Aachim Wirtz who had the steel made to order as well as the SC145 before) and I did not have the SI and P contents, just was told that these are very low. It should have about the same amount of Si and P as the SC145.

    Now I hope all the information above is right, because if it is not and Aachim finds out, that he might stop doing HT on my carbon blades ...

  6. #6
    Senior Member bryan03's Avatar
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    145sc :
    C 1,44%
    Si 0,09
    Mn 0,31
    P 0,006
    S 0,004
    Cr < 0,1
    Ni < 0,1
    Mo < 0,1
    Cu < 0,007
    Al < 0,04
    Ti < 0,001
    Nb < 0,002
    V < 0,004
    W < 0,003
    Co < 0,002
    N < 0,003
    Mg < 0,0003
    As < 0,002

  7. #7
    Senior Member bryan03's Avatar
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    with the 60 , i am going to the final thickness for the edge , prety close to zéro , i use the 120 for "up" the grind ( my english.... :/ )

  8. #8
    Senior Member Matus's Avatar
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    Bryan, your English is light years ahead of my French as well as knifemaking skills

    I understand what you mean. I am just surprised that you go directly from 120 belt to JNS 300 - don't you find it hard to remove scratches on the stone?

  9. #9
    Senior Member bryan03's Avatar
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    thank you Matus.

    with the soft steel it's easy. sometimes i use 240belt and 400... but not for this one. It depends on my modo

  10. #10
    Senior Member milkbaby's Avatar
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    Thanks for sharing, very cool wip pictures!

    Is this a clad knife?


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