| 摘要 |
The invention relates to blades for cutting moving lines of material, especially for cutting lines of paper or cardboard, plastic films or metal foils. Known blades (1, 2) have a blade body (3) with a steel cutting edge (5). According to the invention, foreign ions are inserted between layers in the cutting edge (5) by means of a plasma-assisted process, the penetration depth being between 50 mu m and 500 mu m, preferably between 100 mu m and 200 mu m. The doping of foreign ions in the metal lattice produces an improvement in hardness which is optimal for cutting without causing the steel to become too brittle. The inventive blades therefore have a long service life, even when used to cut lines of paper or cardboard, which can be abrasive, and are still economical to produce.
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