Alphas-C (L-TD)

ALPHAS-C is internationally known as the L-TD process, or Low Temp Toyota Diffusion Process, developed in the Toyota Central Research and Development Lab Inc. in Japan. The remarkable coating  properties have been applied for dies and tools used under high temperature >1,100°F such as Aluminum Die casting, Extrusion and Hot Forging.

It is metallurgically bonded through the diffusion process and it is tight and strong adhesion to the substrate steel, which offers exceptional flaking resistance. The hardness and thicker deposition, dense and pure structure of ALPHAS-C provides unparalleled properties and contributes significantly to the longevity of tools and dies.

ALPHAS-C has unique duplex layers which consists on Cr-CN plus Compound layer +Diffusion layer of nitriding.

Characteristics

Coating CrCN - Chrome Carbon Nitride 
Hardness 1500-2000 Vickers
Thickness 3-6µm
Surface Dense
Oxidation Temp Approx 1450°F
Coefficient Friction N/A (but it is improved by base roughness)
Adhesive Tendency Low affinity against other metals
Color Sliver-Grey, Light Black, varies with substrate material

 

 

Galleries
Alphas-C Example Gallery
H13 (SKD61)
H13 (SKD61)
H13 (SKD11)
H13 (SKD11)
H13 (SKD61)
H13 (SKD61)
H13 (SKD61)
H13 (SKD61)
H13 (SKD61) BEFORE COATING
H13 (SKD61) BEFORE COATING
Facts and Data
Comparative rotating torque related to friction force of various coatings
Comparative rotating torque related to friction force of various coatings
Comparative Wear Depth
Comparative Wear Depth
Comparative Wear Volume
Comparative Wear Volume
Application to core pins for aluminum die casting
Application to core pins for aluminum die casting
Application to core pins and bushing for aluminum die casting
Application to core pins and bushing for aluminum die casting
Summary of an example of successful applications
Summary of an example of successful applications
Comparative resistance to sticking of counter-material of various coatings at high temperature
Comparative resistance to sticking of counter-material of various coatings at high temperature
Comparative resistance to sticking of counter-material of various coatings at high temperature
Comparative resistance to sticking of counter-material of various coatings at high temperature
Comparative weight change of various coatings in heating at ambient atmosphere at high temperature
Comparative weight change of various coatings in heating at ambient atmosphere at high temperature
Comparative weight loss of various coatings in molten aluminum
Comparative weight loss of various coatings in molten aluminum
Comparative fracture load obtained by static bending test
Comparative fracture load obtained by static bending test
Comparative wear rate of various coatings
Comparative wear rate of various coatings