| 摘要 |
Process for hardening the cutting edges of saws, knives, cutting tools and punching tools, particularly for working wood, paper, paperboard, plastics, leather or textiles, by means of an energy beam which is passed over the areas of the tool to be hardened. Optimum hardening is achieved in that as the energy source, a plasma beam is used, where the plasma beam (2) is guided at a relative velocity (v) of 5 to 100 mm/sec with reference to the cutting edge of the tool, and where the distance of the outlet nozzle of the plasma torch (1) from the cutting edge lies between 2 and 14 mm, and where furthermore the power of the plasma beam lies between 1 and 10 kW, and the diameter (d) of the outlet nozzle of the plasma torch (1) is 3 to 7 mm. Fig. 1 14
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