Каталог Dormer Pramet фрезерование 2021 - 2022 - страница 779

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9 TYPES OF WEAR ON MILLING INSERTS OXIDATION GROOVE ON THE MINOR EDGE ↑ Use a more wear resistant substrate (S). (MT)CVD + + CVD coating (decisive factor is oxidation resistance – a Al2O3). PVD f ↓ Feed has infuence on shape and position of groove. v ↓ Decrease cutting speed. ap ↓ Minimal effect. ↑ Use another (more positive) cutting geometry. ++ It can help, but only with ideal working conditions. PLASTIC DEFORMATION ↑ Using a more wear resistant substrate (decisive factor is content of Co). (MT)CVD + Any coating (decisive factor is friction). PVD f ↓ Decrease feed rate. v ↓ Decrease cutting speed. ap ↓ Minimal effect. ↑ Use another (more positive) cutting geometry. ++ It can help, but only with ideal working conditions. NOTCH WEAR ↑↓ It depends on the character of the damage (abrasive – use more wear resistant substrate; breaking – use tougher substrate). (MT)CVD + + CVD coating (decisive factor is oxidation resistance – a Al2O3). PVD f ↓ Feed has infuence on intensity, but less than the cutting speed. v ↓ Decrease cutting speed. ap ↑↓ Use unequal depth of cut. ↓ Use less positive cutting geometry. + It can help, but only with ideal working conditions. Use tool with smaller setting angle. 778