TiN Coated Slotter Cutting Blade HRC 68 for Corrugated Carton Slotter Machine with Long Wear Life

The ZHIJING TiN Coated Slotter Cutting Blade is a surface-engineered replacement part for corrugated carton slotter machines that must keep running through long, uninterrupted shifts. A super-hard alloy steel substrate is first heat treated to HRC 60-68 and precision ground, then coated with titanium nitride by physical vapor deposition. The golden TiN layer gives the cutting edge a hardness of over 2000 HV while keeping the tough core underneath, so the blade resists abrasive wear from recycled fibers, clay coatings and dust without becoming brittle. This coating also lowers the friction between steel and paperboard, which reduces heat build-up at the cutting point and keeps slots clean and accurate for a noticeably longer period between regrinds.

For box plants processing recycled corrugated board or board with abrasive surface coatings, uncoated blades typically show visible edge rounding within days. The TiN coated version extends the productive interval by several times under the same conditions, which means fewer changeovers, less scrap at start-up, and lower cost per thousand slots. When the blade eventually needs maintenance, the substrate can be reground and recoated, so the expensive steel body keeps delivering value through many service cycles instead of being discarded.

• PVD Titanium Nitride Coating: A dense, golden TiN layer of 2-4 µm raises surface hardness beyond 2000 HV while the tough substrate absorbs impact loads.
• Super-Hard HRC 60-68 Substrate: The precision heat-treated core provides a stable platform for the coating and resists deformation under heavy slotting pressure.
• Greatly Extended Service Life: Field use on abrasive recycled board shows several times longer running time between regrinds compared with uncoated super-hardness blades.
• Reduced Friction and Heat: The low-friction coating prevents paper fibers from welding onto the edge, keeps the cut cool, and reduces dust generation.
• Corrosion and Adhesion Resistance: TiN protects the steel from moisture, ink residue and adhesive build-up that commonly attack slotter blades in packaging plants.
• Regrind and Recoating Service: Worn blades can be returned for professional regrinding and recoating, lowering the long-term cost of replacement tooling.

This TiN coated slotter blade is designed for the slotting stations of flexo printer slotters, rotary slotter machines and folder gluer lines that process recycled corrugated board, coated white-top liner, or board contaminated with sand and grit. It is also an excellent upgrade for machines running at high line speeds, where friction heat quickly softens ordinary blade edges. Plants producing regular slotted cases, die-cut blanks and heavy-duty packaging will notice cleaner slot edges and steadier dimensional accuracy. The same coating technology can be applied to creaser knives, slitter knives and trim knives, letting maintenance teams standardize on one high-performance coated series across the whole converting line.

Coated edges are fragile only in the sense that they must arrive untouched: each blade is individually protected with edge guards, anti-rust treated, and packed in carton boxes or plywood cases selected according to blade size. ZHIJING is an ISO9001 certified manufacturer, and every coated blade passes coating thickness measurement, hardness verification and final geometric inspection before release. We offer pre-production samples, coating certificates and material test reports on request. Tell us your board grades, machine model and blade dimensions, and our application engineers will confirm whether TiN coating or an alternative treatment such as CrN or TiAlN suits your production conditions best.