Inserts Optimize Machining of High Temperature Alloys

Two new Walter Valenite ISO indexable inserts are designed for machining nickel, cobalt and iron-based high-temperature alloys such as Inconel 718 and Waspaloy, commonly used in the aerospace, power generation and chemical industries.

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Two new Walter Valenite ISO indexable inserts are designed for machining nickel, cobalt and iron-based high-temperature alloys such as Inconel 718 and Waspaloy, commonly used in the aerospace, power generation and chemical industries. The geometries are designed for turning operations and feature a new cutting edge design that minimizes the effect of the typical wear mechanisms seen in machining high temperature alloys. The new geometries are combined with a PVD-aluminum oxide coating (grades WSM10 and WSM20) that provides a high level of heat resistance and promotes faster cutting speeds when machining high temperature alloys, the company says.

 

The new NRS geometry is designed for roughing operations while the NMS geometry is targeted at medium machining and semi-finishing. Both feature a sharp cutting edge design that reduces edge build-up and minimizes cutting pressures, along with edge strength and toughness to deter notch formation and chipping. Their geometries promote good chip evacuation, avoiding the often destructive chip impact typical with high-temperature alloy machining.