Sandvik Coromant is upgrading its range of turning inserts for machining ISO-P steels. The tooling specialist has launched two new carbide grades that are designed for external and internal machining of low-alloyed and unalloyed steels. The new inserts, called GC4415 and GC4425, deliver increased toughness, heat resistance and predictable wear.
GC4415 and GC4425 are ideal for manufacturers operating in mass and batch production set-ups machining low alloyed (P 2.1 to 2.6) and unalloyed (P 1.1 to 1.5) steels, respectively.
Grade GC4425 is shown to outperform competing inserts in a majority of steel turning applications. It features improved wear and heat resistance and toughness, which significantly expands the application range. Both it and GC4415 can be used for finishing to roughing, in applications with continuous cuts and light interruptions.
Meanwhile, GC4415 is designed to complement GC4425 when enhanced performance and more heat resistance is needed. In addition, the materials’ new post-treatment is found to boost performance in intermittent cutting operations, avoiding any sudden breakages and enabling both insert grades to outperform over a broad application range.
Enhanced wear resistance
The GC4415 and GC4425 inserts show superior wear resistance over competing inserts, which contributes towards extended tool life and predictable performance with every use. This also minimises material waste, both from the workpiece and the insert.
The inserts’ superior wear resistance is attributed to Sandvik Coromant’s second generation Inveio technology, an alumina coating layer. What makes Inveio unique can be seen at a microscopic level; its surface is characterised by a uni-directional crystal orientation.
For better sustainability, the carbide substrate of these new grades contains a high proportion of recycled carbide material, more than 50 percent. Making grades from recycled material saves virgin raw material, and requires less energy and fewer CO2 emissions in production
Lower production cost
Customers have been able to implement higher cutting speeds (vc) and multiplied feed rates (fn) with the new carbide inserts.
In one case, a general engineering manufacturer subjected a 4140 pre-heat treated steel workpiece to multi-directional external roughing with the GC4425 insert. Compared with using a competitor’s ISO-insert for the same process, the customer was able to achieve a 100 percent productivity increase, with a reduced cycle time of 50 percent plus a 30 percent cost reduction.
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