New Turning Insert Grades for HRSA Machining

SANDVIK COROMANT introduced two new PVD insert grades, GC1205 and GC1210, for secure, high-precision turning of aged nickel-based heat-resistant superalloy (HRSA) materials.

When turning aero-engine components, the surface requirements are high but no longer difficult to achieve, thanks to the new insert grades. Together, they cover a broad range of applications for last-stage machining (LSM) and intermediate-stage machining (ISM).

There are several features that help in working with the high-level performance of HRSA materials. A hard, fine-grained new substrate, the latest physical vapor deposition (PVD) coating technology, and optimized edge-line integrity provide increased flank wear and secondary notch wear resistance, superior edge-line security and reduced flaking.

Typical aero-engine components that the grades can machine are gas turbine discs, casings, blisks, spools, shafts and blades. But these grades also prove to be a great choice in demanding applications such as power generation turbines and medical implants made of cobalt-chrome.

The new grades offer machining operations the opportunity to increase cutting data and prolong tool life predominantly in last-stage machining and intermediate-stage machining of aerospace and medical components, according to Saunders.

The grades complement each other thanks to an overlap in the assortment. GC1205 is a finishing grade for machined surfaces in LSM and ISM applications. GC1210 complements GC1205 when more toughness is required and is mainly used in ISM applications for nonmachined surfaces.

“For our customers, this translates into possibilities to run the inserts at higher cutting speeds with GC1205 and increased tool life with GC1210. Additionally, it ensures consistent and predictable tool life while reaching the required surface integrity demands for critical aerospace components,” stated Martin Saunders, global product application specialist for turning.

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