sndmn11
"DADDY"
The finer grits on a high carbide steel polish the carbides but can remove the structure holding the carbides together. If you get the edge too thin with a flat angle, the carbides chip out because the structure holding them together is too weak. You can take a low carbide steel at flat angles easily, think a razor, but the wear resistance sucks and it is sharp because it is thin.I assume it’s rough because the burr makes it feel sharp. As soon as that’s polished off your back to a dull knife.
More carbides means more wear resistance, but it also means it is more brittle because there is less of the structure between.
When you get a high carbide steel grinding with a powered tool and the angle is too flat, you can just watch the edge powder away.
New Micrographs of 42 Knife Steels - Knife Steel Nerds
How do different steels look on a microstructure level? What can we learn about the performance of steel based on using a microscope?
knifesteelnerds.com