HB 7010-1 Turning Grade Resists Wear at High Cutting Speeds

The Hoffman Group’s Garant HB 7010-1 turning grade has an extremely hard, wear-resistant and thermo-resistant CVD coating made of aluminum oxide Al203 and titanium carbonitride Ti(C,N).

The Hoffman Group’s Garant HB 7010-1 turning grade was developed to achieve wear resistance at the highest cutting speeds. According to the company, it has a hard, wear-resistant and thermo-resistant CVD coating made of aluminum oxide Al203 and titanium carbonitride Ti(C,N), which protects the carbide substrate, even at high cutting speeds and process temperatures.

The carbide substrate is particularly resistant to plastic deformation, splintering and brittle fracturing as it is ductile and the coating is particularly resistant thanks to straightened crystal structures, the company says. Its smooth surface enables optimum chip evacuation via the insert surface and reduces the friction between the component and the tool material, thus lowering the process temperatures.

In contrast to the casing, the core of the indexable insert is ductile. The carbide substrate is graded, which means that it has an increased proportion of titanium nitride (TiN) in the outer layer in order to adapt the thermal expansion coefficient to the coating, the company says. As a result, the coating optimally adheres to the substrate and because of the similar thermal expansion coefficient, the coating cannot shear away, even at high process temperatures.