- Joined
- Jun 4, 2010
- Messages
- 6,642
I recently picked up a smooth (polished) steel at a local restaurant supply store. I've noticed it to be useful not just for refreshing the edge periodically, but also immediately after resharpening on a stone/hone. More effective with some blades than with others; mainly limited to softer/medium-hardness stainless. On ductile-steel blades that produce tenacious burrs that don't like to break away too easily, it seems to handle those pretty well, adding a noticeable uptick in sharpness. It's especially noticeable on coarser-finished edges (~325 or so, and maybe a step coarser), in aligning all the 'teeth' along the edge immediately after honing. I tested this after sharpening one blade on an XC DMT; the results were impressive. :thumbup:
David
I set up my wife's kitchen utility knife on an XXC DMT followed by a smooth steel. Plastic deformation flows the edge into a much thinner line while keeping a lot of the variation seen in profile. Fast, dirty, and really strong all around edge. In my experience it works best/most reliably as you describe, on coarse and medium finishes with lower RC steel. With a lot of attention I've gotten good results even on D2 at higher RC, but is very unforgiving of angle wobble.
I've also tinkered with but cannot confirm that it increases edge retention on lower RC steels, but anecdotally it sure seems to. Have used it with a bit of force between medium and finer finish to see if it increases edge retention in this manner but cannot confirm or deny that either. When used in industry eg roller burnishing, it potentially increases load bearing and surface hardness to a depth of several hundred microns. Even used by hand at lower pressure and at a slightly higher angle, it must have an effect perhaps in the tens of microns deep, certainly in the single digit microns.
Is effective no doubt, I do find it very difficult to control and to get consistent outcomes.