SMT- 227

High Performance Coating for cutting application

SMT-227 is a wear and corrosion resistant titanium nitride hard coating deposited by the State-of-the-art physical vapour deposition (PVD) process

SMT-227 coating provides good performance in Conventional cutting applications. SMT-227 golden colour makes it applicable for many decorative purposes. The dense coating structure keeps the coating intact even in severe conditions. SMT-227coating has hardness above 2500 HV and its extremely inert nature protects it from abrasive & adhesive wear, galling and welding. The optimum coating is determined on the basis of both conditions of use and economic considerations. Tool life increases minimum 2 to 3 times with improved cutting finish compared to uncoated tool. Since, the coating tenaciously clings to rake faces and wear lands; less stock is removed in re-sharpening and more regrinds are possible. Once the coated tool has been re-sharpened, the flanks of the tooth remain protected against welding but the face is exposed. Recoating the tool with SMT-227 coating again trims down conditions which lead to the tooth wear result in increasing profits and productivity. The thickness range is 1-5 µm and can be tailored as per application.

SMT-227 Properties Features
• Hardness: 2500 ± 200 HV • Good wear protection
• Oxidation Temp: 600oC • Good Corrosion resistance
• Surface Roughness (Ra): 0.25 µm • Excellent adhesion
• Friction coefficient: 0.5 • Biocompatible
• Wear coefficient:5.0 x 10-14 m2/N • Low friction coefficient
• Coating Structure: Monolayer  
• Colour: Golden yellow  

Hobs and Broaches Enhances productivity and precision in gear cutting application.
Extrusion dies Reduces friction and wear at the die surface.
Plastic injection moulding Moulds, Nozzles, Extrusion screw, Reduces material sticking, corrosion.
Medical implants on implants like Collar bone, knee joints.
Surgical instruments Used for surgical knife, clamps, blades, Reduces corrosion.
Coating Performance
Tool: Tap M2
Workpiece: SS 400
Cutting parameters:
vc = 15 m/min (600 rpm)
Depth of Cut: 0.25 mm