請問各位前輩，小弟最近買了一部公路車，車架材質是carbon 700K，請問1K、3K、700K有何不同的地方嗎?哪一種比較好呢?謝謝！
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jackchen0330 wrote:
http://lgb...(恕刪)
以下節錄至網頁Technically Perfect Points
裡面有提到700K Carbon，好像Kestrel的碳纖車架有分700K跟800K的 Carbon等級，參考參考，詳細的留給專家來說明嚕。碳纖維的基本介紹(想對碳纖維有更進一步了解的可以參考一下)
21. Carbon fiber has the best stiffness-to-weight and strength-to-weight ratios of any frame material, with infinite fatigue life and a shock-damping capability 10-15 times that of metals. But not all carbon is the same - there are different grades of carbon, just as there are different grades of metals. We use two different grades of carbon fiber, 700K and 800K. The "K" is short for ksi, which denotes the material's tensile strength in thousands of pounds per square inch. So 700K carbon can withstand a tensile load of roughly 700,000 pounds per square inch of material. And 800K is even stronger, taking an 800,000-pound load. For comparison: chrome-moly steel falls into the 63-97 ksi range, 3Al/2.5V titanium is 73-90 ksi, 6Al/4V titanium is 128-138 ksi, 6061-T6 aluminum is 40/45 ksi, and 7075-T6 aluminum is 73-83 ksi.
But even more significant is stiffness, since a stiff frame that resists pedaling forces is a more efficient one. Carbon's stiffness trumps other frame materials, hands down. Our 700K carbon has a relative stiffness (or Elastic Modulus) of 33.4 million pounds/square inch (msi), and the 800K fiber we use is 42.7msi. (Chrome-moly steel, the stiffest metal used in bicycle frames, comes in at 29.7 msi, 3Al/2.5V titanium is 14.5 msi, 6Al/4V titanium is 16.5 msi, while 6061-T6 and 7075-T6 aluminum are 10.0 and 10.4 msi, respectively.)
[ref “About Carbon” page of our Technology section]
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jackchen0330 wrote:
請問各位前輩，小弟最...(恕刪)
700K 的K跟 3K 12K 的K是不一樣的K
請看詳解~
http://www.mobile01.com/print.php?f=268&t=1566793&p=2&v=19687531
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