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Type: Posts; User: Larrin

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  1. Replies
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    I blame my parents.

    I blame my parents.
  2. Thread: cpm knives

    by Larrin
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    Why does small carbide size make steel hard to...

    Why does small carbide size make steel hard to work with?
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    As an example of how important responsive web...

    As an example of how important responsive web design can be:

    Januray 2012:
    desktop - 84.37%
    mobile - 9.28%
    tablet - 6.34%

    January 2013:
    desktop - 74.05%
    mobile - 14.09%
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    Thank you for the suggestions, Bill. The...

    Thank you for the suggestions, Bill. The measurement after the price is the thickness and width of the bar of steel, it is unrelated to the pattern.
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    Website redesign!

    We have relaunched! http://www.devinthomas.com The website was redesigned by Dillard George, who also created the last iteration of the website. The redesign offers several new features:

    The...
  6. Thank you for all the positive feedback. I look...

    Thank you for all the positive feedback. I look forward to any questions.
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    I wrote up an explanation of retained austenite...

    I wrote up an explanation of retained austenite and how cryo relates to it: http://www.kitchenknifeforums.com/showthread.php/15632-What-is-retained-austenite-How-does-martensite-form
  8. I hate it when it won't let me edit anymore.

    I hate it when it won't let me edit anymore.
  9. What is retained austenite? How does martensite form?

    After the recent thread on cryogenic processing, I thought I would give a short description of what retained austenite is. Retained austenite cannot be understood without explaining how martensite...
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    Sticky: Not that I know of. That's not the point I was...

    Not that I know of. That's not the point I was trying to make.
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    Sticky: I read on a thread recently that AEB-L has more...

    I read on a thread recently that AEB-L has more retained austenite than other steels. That is false.
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    Cryo is actually detrimental to toughness. It...

    Cryo is actually detrimental to toughness. It doesn't improve it.
  13. Thread: VMatter knives

    by Larrin
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    My guess is that if the 3nm edge is real it's a...

    My guess is that if the 3nm edge is real it's a fracture edge which would mean nothing as far as knives go. It's just more misleading marketing.
  14. Thread: VMatter knives

    by Larrin
    Replies
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    There's no way they're sharpening down to a 3nm...

    There's no way they're sharpening down to a 3nm edge as is shown on the indiegogo page.. They also have a micrograph of steel that doesn't look like steel. I don't know what they did to that poor...
  15. Thread: VMatter knives

    by Larrin
    Replies
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    3,392

    Here is an article about injection molding for an...

    Here is an article about injection molding for an edge that is already sharp: http://info.liquidmetal.com/blog/bid/289868/Liquidmetal-Blades-Knives-and-Other-Sharp-Things

    While they state that...
  16. Thread: VMatter knives

    by Larrin
    Replies
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    3,392

    There's certainly nothing new about the...

    There's certainly nothing new about the design/profile.
  17. Thread: VMatter knives

    by Larrin
    Replies
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    3,392

    They can't have molds that end up with a...

    They can't have molds that end up with a sharpened edge. There is sharpening done on the final knives. As far as never needing sharpening. That's the very question here. Are they just marketing? Or...
  18. Thread: VMatter knives

    by Larrin
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    3,392

    As far as I can tell the advantage is marketing...

    As far as I can tell the advantage is marketing and injection molding. It's not all that abrasion resistant either (compared to steel and ceramic) so I'm not sure what would cause it to hold an edge...
  19. Thread: VMatter knives

    by Larrin
    Replies
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    Actually if it was in the mid 50's it would be...

    Actually if it was in the mid 50's it would be quite hard for these types of materials. It's likely not even that hard. I don't know of any reason why it couldn't be sharpened.
  20. Thread: VMatter knives

    by Larrin
    Replies
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    I agree with those in the thread that all...

    I agree with those in the thread that all indications point to vitreloy.
  21. Thread: VMatter knives

    by Larrin
    Replies
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    3,392

    VMatter knives

    I came across these knives randomly when listeningnto a technology podcast: http://www.indiegogo.com/projects/vmatter-cutlery-kitchen-knives

    I was going to do a writeup on liquidmetal and the...
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    Hi Guys! I was waiting to respond to this thread...

    Hi Guys! I was waiting to respond to this thread when I found out the result of my qualifying exam. The exam is a three day, comprehensive exam covering all of the fundamentals of Metallurgy. One 6...
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    Like I said, hardness values are not what you...

    Like I said, hardness values are not what you should look at.
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    I'm not sure where to start with my response....

    I'm not sure where to start with my response. You're confusing many things together, and using some terms I'm not familiar with, i.e. frequency composition. Bottom line, you're confusing stiffness...
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    The hardness doesn't effect the vibration....

    The hardness doesn't effect the vibration. Vibration is controlled by the elastic modulus which remains the same regardless of heat treatment. Therefore you could go as hard as you want without...
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