Originally Posted by
bluesman7
Here is an interesting tid bit that I ran across last night regarding polishing steels containing hard carbides;
"With the finer grits the volume of material is reduced, and at some point, the grind depth is similar in size or even smaller than the carbides. At this crossover point, if the abrasive is softer than the carbides it is unable to abrade the carbides and can only wear the surrounding steel until the carbides fall out. Therefore, polishing of vanadium-containing steels is challenging with standard aluminum oxide and silicon carbide abrasives."