1.Ordinary alloy tool steels (such as 65Mn, 9CrSi): They have good toughness but poor corrosion resistance, so focus on rust prevention and maintenance. In humid environments, apply anti-rust oil after each use; for long-term storage, thoroughly clean them and store in a sealed container. When grinding, control the grinding amount to avoid reducing the strength of the knife body due to excessive grinding.
2.Stainless steel (304/316 food-grade): It has strong corrosion resistance, and the core maintenance is cleaning to prevent pollution; in the food/medical fields, food-grade cleaning agents must be used for disinfection to avoid residues; it is forbidden to scratch the surface with hard tools to prevent damage to the passivation film; after polishing, re-passivation treatment is required to ensure corrosion resistance.
3.Cemented carbide/tungsten steel: High hardness but high brittleness; the key point of maintenance is to prevent impact; avoid excessive force when grinding, and it is forbidden to knock the cutter body; handle with care during installation and disassembly to prevent the alloy layer from falling off; when worn, it is better to replace the whole one, and it is not recommended to grind and repair it privately.
4.High chromium cast iron/wear-resistant alloy: It has strong wear resistance but poor toughness. It is necessary to check for cracks regularly; avoid handling ultra-hard impurities to prevent chipping; use high-temperature wear-resistant lubricating oil during lubrication, which is suitable for high-abrasion working conditions; replace it in time when tiny cracks are found to prevent the cracks from expanding.
5. Coated cutting tools (DLC, TiN, etc.): Focus on protecting the integrity of the coating; it is forbidden to scratch the coating with sharp tools to avoid coating peeling; use a soft cloth for cleaning and do not use corrosive cleaning agents; when the coating is worn, it is necessary to re-coat or replace the cutting tool, and it is not allowed to continue using it after grinding the coating.
