PVD-Coated Insert

Walter has created a PVD coating for its Tiger-tec cutting grades by applying aluminum oxide to its inserts. Until now, aluminum oxide could be used only with CVD coatings. These cutting tool materials are particularly designed for use in the aerospace and power generation industries.

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Walter has created a PVD coating for its Tiger-tec cutting grades by applying aluminum oxide to its inserts. Until now, aluminum oxide could be used only with CVD coatings.

These cutting tool materials are particularly designed for use in the aerospace and power generation industries. The PVD Tiger can process titanium and titanium alloys successfully, the company says. By using aluminum oxide layers, the new cutting tool material is tough and resistant to elevated temperatures. The cutting tool materials combine the positive features of both CVD and PVD coatings. The PVD coating excels on sharp cutting edges, but it is less heat resistant and chemical resistant than the CVD coating, which performs well in both areas. The CVD insert cutting edges are more rounded because of thicker layers, making the cutting edge less sharp than that of PVD inserts. High cutting speeds usually run with CVD can now also be run using PVD cutting tool materials. With its reduced thermal conductivity, the aluminum oxide produces a heat insulation layer that protects against high temperatures.