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Edge Rolling in High Vanadium Knives
#17
Mike, you are asking good but tricky questions. Wink


Diamond abrasive, thanks its hardness, is suitable for machining all carbides, but is not suitable for machining steel. The reason is following: at high temperatures produced in high speed grinding process, steel extracts carbon atoms from the diamond abrasive, which results in eroded diamond grit.
 
CBN abrasive, in contrast to diamond, contains no carbon atoms which could be extracted, and for this reason is CBN better suitable for machining hardened steel and HSS.
 
There is another advantage of CBN over diamond abrasive. Diamond is at room temperature about two times harder than CBN, but losses the hardness very rapidly with temperature rising above 700⁰C (1290⁰F).  For temperatures above 1000⁰C (1830⁰F) CBN performs better than diamond.
 
Jan
 
P.S.: IMHO Tormek offers diamond wheels and not CBN wheels because at low temperatures (water cooled grinder) they perform better than CBN wheels.


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Messages In This Thread
RE: Edge Rolling in High Vanadium Knives - by EOU - 05-17-2018, 04:05 PM
RE: Edge Rolling in High Vanadium Knives - by Jan - 05-18-2018, 02:37 PM
RE: Edge Rolling in High Vanadium Knives - by EOU - 03-15-2019, 10:00 AM
RE: Edge Rolling in High Vanadium Knives - by EOU - 03-18-2019, 12:13 PM
RE: Edge Rolling in High Vanadium Knives - by Jan - 03-18-2019, 02:44 PM
RE: Edge Rolling in High Vanadium Knives - by EOU - 03-19-2019, 09:21 AM
RE: Edge Rolling in High Vanadium Knives - by Jan - 03-19-2019, 02:26 PM
RE: Edge Rolling in High Vanadium Knives - by Jan - 03-22-2019, 01:46 AM

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