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  1. Replies
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    Not yet, I need to do more work with it. In...

    Not yet, I need to do more work with it.

    In regards to cutting ability, these knives are zero ground to 7.5 dps primary bevels. As a point of reference for how well they cut, I just finished a...
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    When a steel forms into an ingot then the...

    When a steel forms into an ingot then the segregation (clumping of the alloys) that form is a function of the ingot size, the larger the ingot the greater the clumping. P/M processing essentially...
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    I count them. I visualize the numbers running in...

    I count them. I visualize the numbers running in my head I don't vocalize them as I am always watching something (documentary, etc.) when sharpening. I mark off every 50 passes on high volume...
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    I have the mules, this isn't a standard high...

    I have the mules, this isn't a standard high carbide steel, it is very difficult to grind.

    To start I needed to sharpen the blades, I started with one of the ones which is optimized for toughness...
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    If it does then it just means that the HT was...

    If it does then it just means that the HT was more optimal on the spray form one or more likely, the reporting was simply biased in its favor.

    All of those steels are very similar in properties,...
  6. If you just want a degree in metallurgy meaning a...

    If you just want a degree in metallurgy meaning a piece of paper then it is extremely simple. There are lots of so-called diploma mills that will churn out any certificate, degree or diploma that you...
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    Yes they do because they are not the same in many...

    Yes they do because they are not the same in many respects. For example vitamin E has many actual forms, however when you take a supplement you mega dose one form which can actually cause your body...
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    I have not cut much of it, it isn't commonly used...

    I have not cut much of it, it isn't commonly used here.

    There are many reasons why some wood will dull a blade very fast and others will not, the main ones have to do with chip formation in...
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    In regards to bamboo having silica, your blood...

    In regards to bamboo having silica, your blood also contains iron, that doesn't mean if you bleed on a piece of paper and try to cut it that it would be similar to trying to cut an iron frying pan....
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    If ZDP-189 is chipping on cutting zip-ties or...

    If ZDP-189 is chipping on cutting zip-ties or other plastics then :

    -there is a problem with the steel
    -it isn't sharpened properly

    or some combination of the two.

    In regards to cutting up...
  11. Indeed, I routinely sharpen blades which are...

    Indeed, I routinely sharpen blades which are generations old. If you are sharpening a knife and seeing a rapid loss of metal then you are doing something fair wrong unless that is your goal of...
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    The hardness in most cases should not be the...

    The hardness in most cases should not be the control variable. The over promotion of hardness for steels in the knife industry is leveraged heavily by the marketing sheets where the promotional steel...
  13. This has been popularized by a number of people...

    This has been popularized by a number of people who can aggressively promote it. The ironic thing is that by doing it the expensive steel often is dramatically out performed by a basic steel which...
  14. Very similar work but this time with the medium...

    Very similar work but this time with the medium and fine rods :


    https://www.youtube.com/watch?v=72eEBMeWUjw
  15. Delica ZDP-189 edge retention : Fine vs Medium rods on polypropylene (dirty/used)

    Background and similar work with the CBN vs medium : http://www.spyderco.com/forums/showthread.php?64556-Delica-ZDP-189-edge-retention-CBN-vs-Medium-rods-on-polypropylene-rope-(dirty-used)

    ...
  16. Yes, the problem is that the F/UF rods apply a...

    Yes, the problem is that the F/UF rods apply a very high polish and if you micro-bevel you can easily polish out any scratches. I used the fine rods after the CBN rods in the CBN rod thread and...
  17. Yes, you can also try just one very light pass on...

    Yes, you can also try just one very light pass on one side only for the smallest increment in edge refinement.
  18. If you want a finish between the diamond rods and...

    If you want a finish between the diamond rods and the medium rods then just apex cleanly on the diamond rods (this is critical) and do very few passes with the medium rods. The medium rods will not...
  19. In general yes. In this case I didn't as I wanted...

    In general yes. In this case I didn't as I wanted to see the effect of not doing so compared to the previous work.



    The carbides are much smaller than the teeth, and the interesting thing is...
  20. Here is the same chart, I just combined all the...

    Here is the same chart, I just combined all the runs to more clearly show the difference between the two finishes :
    ...
  21. I reset the bevel with the Bester 700 waterstone...

    I reset the bevel with the Bester 700 waterstone and then micro-beveled with the CBN or medium rods to start the run and then just kept using the rods only for multiple sharpenings.
  22. If I was doing fine work with them (slicing green...

    If I was doing fine work with them (slicing green onions, cutting fat from meats, slicing fine paper) I would need to sharpen them, otherwise I would just sharpen them at the end of the day. I can...
  23. Delica ZDP-189 edge retention : CBN vs Medium rods on polypropylene rope (dirty/used)

    Background work on Stanley utility blades : http://www.spyderco.com/forums/showthread.php?64522-Edge-retention-comparison-Sharpmaker-CBN-vs-Medium-rod-(carving-pine)

    As an update :

    ...
  24. That is the key, if you micro-bevel then you can...

    That is the key, if you micro-bevel then you can often jump from the shaping grit to the finishing one in just one step.
  25. There is a critical point here about ideal...

    There is a critical point here about ideal results vs practicality. Western chefs for example commonly use steels as do a lot of fish mongers. If you watch them closely you will see the more they...
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