Razor blade, razor head, and method of manufacture
An integrally formed rigid razor blade made of martensitic stainless steel includes a cutting edge portion, a base portion, and a bent portion. The cutting edge portion extends along a cutting edge portion axis and has a cutting edge at one end. The base portion extends along a base portion axis. The bent portion is intermediate the cutting edge portion and the base portion. The blade has a concave face and an opposed convex face. An average radius of curvature of the concave face of the bent portion is between 0.5 millimeters and 1 millimeters.
1. An integrally formed rigid razor blade made of martensitic stainless steel comprising:
a cutting edge portion extending along a cutting edge portion axis, and having a cutting edge at one end,
a base portion extending along a base portion axis,
a bent portion intermediate the cutting edge portion and the base portion,
the bent portion having a concave face and an opposed convex face,
wherein an average radius of curvature of the concave face of the bent portion is between 0.5 millimeters and 1 millimeters,
the martensitic stainless steel consisting essentially of the following components, in weight:
between 0.50% and 0.75% of carbon,
between 12.7% and 13.7% Chromium,
between 0.45% and 0.75% Manganese,
between 0.20% and 0.50% silicon,
balanced iron, and
traces of Molybdenum.
2. The blade according to claim 1 , further comprising:
an angle of between 95 degrees and 140 degrees formed between the cutting edge portion axis and the base portion axis.
3. The blade according to claim 1 , wherein the base portion further comprises:
an inner face and an opposed outer face, the inner face and the opposed outer face of the base portion defining a thickness of between 0.07 millimeters and 0.12 millimeters.
4. The blade according to claim 1 , wherein the average radius of curvature of the concave face of the bent portion is greater than 0.55 millimeters and less than 1 millimeters.
5. The blade according to claim 1 , wherein the average radius of curvature of the convex face of the bent portion is greater than 0.57 millimeters and less than 1 millimeters.
6. The blade according to claim 1 , wherein the average radius of curvature of the bent portion is greater than 0.535 millimeters and less than 1 millimeters.
7. The blade according to claim 1 , wherein the base portion further includes a rear edge and the rear edge is serrated along a length thereof.
8. The blade according to claim 1 , wherein the base portion further includes a rear edge and the rear edge is not serrated along a length thereof.