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Thread: Barrel Treatments (nitride/CL)

  1. #31
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    Boron carbide

    Google B4C Technologies. That'll tell you everything you want to know. You can get it done through WMD guns.

  2. #32
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    Found it.

    Next time, please refer to it by its proper name. Boron Carbide is not it.

    It is a new form of "boronizing" that supposedly doesn't suffer the issues of the older boronizing processes.

    The statistics they give for hardness are almost unbelieveable, yet at the same time they tout it as being nearly impervious to sulpheric acid, while showing no corrosion testing against common elements such as water.

    What I find interesting is that the process doesn't affect the fatigue strength of the base material at all. One would think that by making the outer layer as hard as they claim, that the overall product would be stronger.

    Don't get me wrong, the process looks very interesting. I like most of what I see, but there are some omissions that kind of bother me in the data. With how hard nitriding came under scrutiny, I think it would be in the best interest of those developing new processes to perform a thorough bank of tests and then make all of the results known.

    The fact that boronizing has been around for awhile and not ever used in this manner (guns) and is mostly touted as an anti-corrosive/errosive makes me kind of leary.

    And I can't find anything on WMDs site about it.
    It is missing the point to think that the martial art is solely in cutting a man down; it is in killing evil. It is in the strategem of killing the evil of one man and giving life to ten thousand -Yagyu Munemori

  3. #33
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    Boron carbide

    Boron carbide diffusion is its official name. Toget it you'd have to call wmd guns and ask for it.

  4. #34
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    Looks like that's a process off of my "interesting", list.

    If the process has been around this long and hasn't been used in this manner and they can't detail testing and comparisons to existing processes, AND it's not listed but rather is a "call only" service with no user feedback to be found......well, I'm gonna consider it a "it sounded good at the time" idea and feel bad for the chumps who are first in line to get the process done. Sucks to be the test cases.

    Good luck with it!
    It is missing the point to think that the martial art is solely in cutting a man down; it is in killing evil. It is in the strategem of killing the evil of one man and giving life to ten thousand -Yagyu Munemori

  5. #35
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    Boron carbide

    I've never used it myself. I happened to exchange some emails with wmd guns about nickel boron coatings and got to talking about nitriding. That was when I was told about it. It's still a very new type of treatment with the stuff involved and is little known.

  6. #36
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    I have a couple of Benchmades with a Boron Carbide coating on the blades. On those knives the Boron Carbide coating is applied using a PVD process and only coats the surface of the steel. Is the treatment you are talking about similar or a different process?

  7. #37
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    Boron Carbide

    No. It's different. From what I remember being told, the barrel received a slurry type treatment in a furnace. the temperature infused the boron carbide into the steel.

  8. #38
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    Quote Originally Posted by An Undocumented Worker View Post
    I have a couple of Benchmades with a Boron Carbide coating on the blades. On those knives the Boron Carbide coating is applied using a PVD process and only coats the surface of the steel. Is the treatment you are talking about similar or a different process?
    It is not the same one.

    There is a treatment (not coating) called "boronizing" that infuses boron into the top layer of the metal. Boron is an extremely hard metal and brings the surface hardness up to what is probably an excessive level.

    There is a reason why barrel steel has the properties that it does. It must be hard enough to withstand the forces applied to it during firing, yet enouth elasticity so that it doesn't crack and create weak spots. Chroming helps extend the life of the barrel by adding a harder layer, but not too hard of a layer that will crack and flake out. Nitriding performs the same feature with the exception that it treats the surface of the steel.

    Now if you treat the surface of hte steel to a point where it's too hard, the forced involved in the firing of a round will probably lead quickly to cracking and burn through at the cracks.

    I would hope this isn't the case, but there is a point of diminishing returns when it comes to hardening metals.

    At a claimed 116 Rc, I think that "boronizing" exceeds that point by several steps.
    Last edited by GrumpyM4; 04-26-12 at 03:45.
    It is missing the point to think that the martial art is solely in cutting a man down; it is in killing evil. It is in the strategem of killing the evil of one man and giving life to ten thousand -Yagyu Munemori

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