Forming & Molding

Ionbond™ 357

Oxynitride CrWN/(CrW)xOy coating for high-temperature forming applications

Ionbond™ 357 marks the next evolutionary step of our well-established Ionbond™ 35 (CrWN) coating with a proven track record in high-temperature forming applications, such as aluminum high pressure die casting. Ionbond™ 357 combines the superior mechanical and thermal fatigue resistance of Ionbond™ 35 under complex thermo-mechanical loads with an excellent resistance to abrasive wear and crack formation. Another unique feature of the top layer is its low coefficient of friction against steel and aluminum at high temperatures. This pays off in increased productivity and machine availability as well as improved product quality and minimized scrap rate in high-temperature forming applications.

The low adhesion tendency of the (CrW)xOy top layer towards common thermoplastics and elastomers minimizes adhesive wear and sticking of the plastic parts to the die and makes Ionbond™ 357 a viable alternative to traditional PVD TiN and CrN coatings in plastic molding applications. The excellent wear resistance of the supporting CrWN layer prevents abrasive wear of the die by the technical plastics and its additives, such as glass fibers and hard particles. The CrWN base layer in combination with the dense, amorphous (CrW)xOy top layer provides increased corrosion resistance compared to a monolayer TiN or CrN coating.

Technical data

Material CrWN/(CrW)xOy

Technology PVD Arc

Thickness range [µm] 4 µm – 6 µm

Microhardness, HV > 2,700

Roughness Ra (Rz) as deposited < 0.1 µm (< 1.9 µm)

Service Temperature ≥ 800 °C

Process Temperature 450 °C

Adhesion (depending on material) HF2 to HF3

Friction vs. Steel (dry) against Al2O3: at room temperature = 0.5 | at T 800 °C = < 0.35

Color Blue-grey

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