???? ?? ??? ?? ???????? ???????? ?? ????? ???? ?? ??? ??? ?? ???? ?? ?????, ?? ????????? ????? ?? ??? ??????????? ?? ??? ??????? ??????? ?? ?? ???, ?????? ???? ?????? ?? ??????? ?????? ?? ???????? ???? ??? ??????? ??????? ?? ???? ????? ???-??? ????? ?? ??? ??? ??, ???? ?????????? ???-??? ?????? ??-????? ?? ??? ???? ???? ???? ?? ????? ???? ?? ?? ????? ?? ????? ?? ???????? ???????? ?? ???????? ????? ?? ??? ???

TRS – transverse fracture strength

???????? ???????? ?? ????????? ???????? ???? ?? ????????: ????? 3327

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

????? ?? ??????, ????????? ?? ?????? ???? ????????? ???????? ???? ?? ???? ??? ???

??????? ?????????????? ?? ???????? ???????? ??? ????? ???? ???????? ???????? ????? ?? ????????? ???????? ???? ?? ????? ??????? ???? ????????? ?? ?????? ???, ????? ???? ????? ???? ?? ???????? ????? ????????? ???? ??? ?? ????????? ???????? ????? ?? ?? ??????? ???? ?? ?????? ????? ????? ?? ??? ??? ?????? ????? ???? ???, ?? ?? ????????? ???? ?? ??? ????? ???? ??? ?? ?? ??????? ???? ?? ?? ??????? ????????? ??? ?????? ?????? ?????, ????? ????? ??? ??? ?????? ???, ?? ????? ??? ?? ???? ??? ?????? ?? ??? ???? ???, ?? ???? ????? ?? ?????? ?? ????? ?? ???? ???? ?? ???? ?? ???? ?????? ?????, ???????? ?????? ??? ????? ?? ???????? ?? ????????? ???? ?? ??? ?? ????? ??????? ???

???????? ??????? ????

?????? ?????? ?? ???? ?????? ????? ???? ???? ?? ???? ??? ?????? ???? ????? ?? ??? ???? ?? ?? ???? ???? ?????? ?????? ?? ??? ????? ??, ????? ???? ?????? ?????? ?? ??? ???????? ???????? ??? ?????? ??????????? ?? ??? ??????? ???? ??? ???????, ?????? ???????? ?? ?????? ?? ????? ???, ????? ??? ?? 25% ??????? ?????? ?? ???? ???? ?????? ?? ??? ???? ????? ?????, ?? ?????????? ??? ?? ???? ?????? ????? ?????? ???

????????? ???????? ????? (TRS) ?? ????? ?? ???????? ???????? ?? ?????? ???????? ?? ????????? ???? ?? ??? ?? ??????? ?? ??? ??? ??? ???? ???? ??? ?????? ???, ???????? ?????? ???????? ???????? ?? ?????? ???????? ?? ????????? ???? ?? ??? ?? ????? ??????? ??? ???? ?? ????? ??? ?????? ??? ??, ???????? ?????? ???? ?? ???? ?? ?????? ?? ??????? ?? ??? ????? ??? ???? ??????? ?? ???, ???? ????????? ????????? ????? ??????

?????? ???? ????

??????? ??????? ???????? ???????? ?? ???????? ??????? ??? ?? ?????? ????? ???, ?????? ?? ??? ??????? ?? ??? ??? ????? ???? ??, ?? 3% ?? 15% ?? ????? ???? ??? ???????? ????? ?? ???????? ?? ????????? ???? ??? ?????? ?? ?????? ???? ?????????? ???? ??? ????? ?? ??????, ??????? ??????? ????? ?? ????, ??????? ???? ?? ???? ????? ???????, ?? ???? ?? ???? ??? ???????? ?? ???? ?? ????? ?? ???? ????  

The key point to note is that the percentage of cobalt is “by weight.”. If you have a cobalt end mill in one hand and a carbide end mill in the other, you will feel the difference in weight. When we say it’s a 10% or 12% weight of cobalt, it’s actually a larger amount by volume. By weight, 12% of cobalt can be converted to more than 20% by volume. The increase in cobalt content usually increases the transverse fracture strength and “toughness” required for micro end mills, but you will sacrifice some “hardness”

?????? ?? ?????

???????? ???????? ?? ?????? ?? ????????? ???? ?? ??? ????????? ?? ??????? ????? ??? ??????? ?? ???????? ??????? ?? ?????????? ???? ??????? ???? K1C ?????? ??????? ??? ??????? ??????? ?? ?????? ????? ??? ?? ??????? ??????? ?? ????????? ???? ?? ???? ??? ?????? ?? ??? ??????? ?? ???????? ?? ?????? ??? ???? ???

???? ?? ????? 

?? ??????? ???????? ???????? ?? ???? ?????????? ????? ??? ?? ?? ??? ????? ??????? ??????? ??? ?? ??? ???????? ?? ???? ??????? ?? ??????? ?????, ????? ????? ??????? ???? ?? ?????, ?? ????? ??? ?? ???? ??????? ?? ???? ????? ???????? ?? ???? ??? ??????? ???? ?????????? ?? ????? ???, ?????? ????? ???????? ???? ???????? ???? ?????? ??, ?? ?????? ??????? ?? ???? ?? ???? ??? ??? ?? ??? ????? ????? ??? ???? ?? ???? ?? ?????? ?? ??????? ??????? ?? ??????, ?????? ???????? ?? ????? ????? ?? 400k-900kpsi (7% / 7) ?? ??? ???? ??

Flexural ?????

??????? ?? ????? ???? ??? ?? ??? ?????? ?? ????? ???? ?? ???? ?????? ?? ???????? ???? ??? ?????????? ?????? ???? ?????????? ?? ??? ????? ??? ???????? ???? ??, ??? ??? (????? ?? ????? ??? ?? 5% ?????? / ???? ?? ???? ???? ??) ?? ?? ?? flexural ???? ?? flexural ??? ???? ?? ??? ??? ??????? ???? ???? ???