Strengthened razor blade
A razor blade including a substrate with a cutting edge, the substrate includes a mixed nitride-substrate interregion disposed at or beneath a surface of the substrate, the mixed nitride-substrate interregion being substantially free of a compound layer.
1. A razor blade comprising a substrate with a cutting edge, the substrate comprising a mixed nitride-substrate interregion disposed at or beneath a surface of the substrate, the mixed nitride-substrate interregion and the substrate being free of gamma prime or epsilon phases.
2. The razor blade of claim 1 wherein the mixed nitride-substrate interregion consists essentially of a solid solution of nitrogen in the substrate.
3. The razor blade of claim 1 wherein the substrate comprises stainless steel.
4. The razor blade of claim 1 wherein the cutting edge comprises a wedge-shaped tip that has an included angle of less than thirty degrees and a tip radius of less than 1,000 Angstroms.
5. The razor blade of claim 1 further comprising a first coating disposed over the surface of the substrate.
6. The razor blade of claim 5 further comprising a second coating disposed over the first coating, wherein the second coating comprises a fluoropolymer-containing material.
7. The razor blade of claim 1 further comprising a second coating disposed over the surface of the substrate.