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Laser Engraving
ISZ KNIVES knives come with a spec sheet that is engraved by laser.
Depending on the material, the output needs to be adjusted, and the adjusted engraving results in a precise and beautiful finish.
By adjusting the output, laser engraving makes it possible to engrave color on certain metals such as titanium and stainless steel. However, care must be taken when engraving on stainless steel knives.
Stainless steel is a metal with good corrosion resistance, and its corrosion resistance is maintained by the oxide film produced by chromium. However, heat irradiation with a laser burns the stainless steel surface when engraving.
It will destroy the oxide film.
*In particular, the burnt color (temper color) on stainless steel is a film derived from Fe, and its corrosion resistance will deteriorate significantly due to a decrease in the pitting potential.
For this reason, ISZ KNIVES has repeatedly experimented with the progression of rust by adjusting the output.
The image above is a test piece for CPM Magnacut.
Three days of outdoor exposure testing after spraying with a 3% salinity liquid
The laser with adjusted power is engraved into a square. The bottom square is light purple. You can see that the darker squares are the ones that rust the fastest.
*The manufacturer has pointed out that high-temperature tempering reduces the corrosion resistance of Magnacut, so at ISZ KNIVES, we engrave all colors except HRC before heat treatment.
For these reasons, even with the same laser engraving, there are some areas that are not rusted and some that are not, and at ISZ KNIVES, we adjust the power of the laser based on the power data of the non-rusted areas.
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