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原帖由 hound 于 2009-2-19 11:20 发表
楼上 翻一下好不
哦
In general the Green Beret had low cutting and chopping ability, poor edge retention, ease of sharpening, grip ergonmics and overall durability. The only two standouts of high performance are grip security and point versatility. The steel was especially disappointing it could not even outperform a Buck 119 in 420HC. In general underhardening or over tempering martensitic stainless to drop the hardness is problematic as there are issues with corrosion resistance, carbide precipitation (specific to over temper) and carbide tearouts as the softer martensite can't hold the carbides. In general it is much better to choose a steel which is designed to run at a lower hardness.
In regards to modifications, there is little to start with as the steel choice, heat treatment and basic design is problematic. A thick blade with a narrow profile and shallow sabre hollow grind has a very low cutting ability combined with poor edge durability. All it does well is pry and this steel has low ductility and impact toughness. The handle also has a host of problems; the tang should be flush with the Micarta slabs, the pins should be flush, the guard should be rounded, and the apex of the finger grooves should be more rounded. On the sheath, the stitching should be reinforce, at least duel runs, with periodic cross stitching to prevent unraveling; changed to a more durable liner, adjust the liner so it isn't covered by the nylon.
总体上讲绿贝雷的切割和劈砍能力都比较弱,刀锋保持能力较差,不易磨利,握柄的人体工学和刀的总体耐久度也不太行。它唯一能称得上出众的是刀尖的多用性和握持的安全性。绿贝雷的钢材质量尤其令人失望,它甚至不如BUCK119的420HC。一般来讲,通过硬化不足或者回火过度来降低马氏体不锈钢硬度是有问题的。因为会出现防锈能力下降、合金碳化物的沉淀(专指回火过度)、碳化物的离析(马氏体的硬度不足以固定合金碳化物)等问题。选用一种被设计成适合在更低硬度工作的钢材比有意降低钢材的工作硬度要合适的多。
说到修改,绿贝雷的选材、热处和刀型设计都很有问题。厚刀脊配上很薄的马刀凹磨导致切割能力下降且刀锋不持久(看起来cliff stamp做的是“深度切割”,与ericf兄的切萝卜不同)。它唯一做的好的就是撬,但是这种材料配合这种热处又让它的形变空间和抗冲击韧性较低(这里很重要,不是硬度低了韧性就会高。比如A2韧性最好的时候是60-61)。手柄的问题,tang和螺钉的部分应该用micarta包起来,护手应该再圆滑一点,指槽的突出部位也应该再圆滑一点。至于刀鞘,应该至少采用交叉双线缝纫,让刀鞘更结实。刀鞘的内衬也应该换一下,换成更耐久更结实的,并且用尼龙包起来。
旁白:CS的第二段话我不做评价,不支持也不反对,但是第一段话,尤其是后半段我是比较支持的,因为从理论上说的通。很不幸地我也只能停留在理论上 |
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