KW-NT
Advanced Solid-State Nitriding for Superior Mold Performance
About KW-NT Technology
Why Choose KW-NT?
Suppresses Thermal Cracks
The compressive stress layer effectively suppresses the occurrence and growth of thermal fatigue cracks.
No Brittle White Layer
Eliminates the formation of brittle white nitriding layers (Fe₂₋₃N, Fe₄N), ensuring no surface embrittlement.
Oxidation Resistance
Forms Fe-Cr₂O₄ or Cr₂N to prevent grain boundary oxidation and erosion by molten aluminum.
Retards Crack Growth
Specialized compounds formed within initial thermal cracks effectively slow down crack propagation.
High-Temperature Hardness
The surface layer maintains hardness for longer periods, reducing softening caused by high temperatures.
Low Friction
The nitrided surface layer significantly reduces intermetallic friction.
Why Choose KW-NT?
Suppresses Thermal Cracks
The compressive stress layer effectively suppresses the occurrence and growth of thermal fatigue cracks.
No Brittle White Layer
Eliminates the formation of brittle white nitriding layers (Fe₂₋₃N, Fe₄N), ensuring no surface embrittlement.
Oxidation Resistance
Forms Fe-Cr₂O₄ or Cr₂N to prevent grain boundary oxidation and erosion by molten aluminum.
Retards Crack Growth
Specialized compounds formed within initial thermal cracks effectively slow down crack propagation.
High-Temperature Hardness
The surface layer maintains hardness for longer periods, reducing softening caused by high temperatures.
Low Friction
The nitrided surface layer significantly reduces intermetallic friction.
Process Specifications
Flexible Temperature Control: Treatment temperatures are adjustable between 450°C and 590°C to suit different steel grades and precision requirements.
Customizable Diffusion Depth:
Ultra-precision components: < 10 μm
Strength & Toughness: 50–70 μm
Die Casting / Forging Molds: 70–100 μm (Max 150 μm)
Stainless Steel Optimization: Can directly treat SUS304, 316, 420, etc., without strong acid pickling, achieving surface hardness of Hv1000–1300.
KW & KWO Nitriding Treatment Inspection of Nitrided Structure
Advanced Process Features
Solid-State Powder
KW-NT uses a non-toxic inorganic powder that is eco-friendly and can be treated as general waste.
Uniform Diffusion
Unlike PVD or standard nitriding, KW-NT achieves uniform layer thickness even on complex shapes, blind holes, and grooves.
Microstructure Analysis
The structure exhibits a gradual decrease in nitrogen concentration from the surface, ensuring the layer closely bonds with the base material while maintaining toughness.
KWP (Nitriding Powder): Before Treatment