Post-Coating Treatment Adds Strength to CVD-, PVD-Coated Grades

Iscar offers a variety of grades coated using a combination of chemical vapor deposition (CVD) and physical vapor deposition (PVD) technology. The company’s Sumo Tec post-coating treatment is designed to deliver improved strength and wear resistance to carbide grades coated in this way.

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Iscar offers a variety of grades coated using a combination of chemical vapor deposition (CVD) and physical vapor deposition (PVD) technology. The company’s Sumo Tec post-coating treatment is designed to deliver improved strength and wear resistance to carbide grades coated in this way. CVD coatings tend to produce internal tensile stresses due to differences in thermal expansion coefficients between the substrate and the coating layers, and PVD coatings feature surface droplets. These factors shorten insert tool life. Applying Sumotec reduces unwanted defects and results in increased the tool life, the company says.

Carbide grade DT150 features a dual moderate temperature CVD and titanium aluminum nitride PVD coating designed to improve machining of hard cast iron. Intended specifically for turning ISO M materials (austenitic and duplex stainless steel), grade IC6025 features a multi-layered coating and the post-coating treatment. IC806 is well-suited for turning and grooving high-temperature alloys, particularly Inconel 718.