The combination of the cemented carbide, coating, preparation and finishing is what leads to the characteristics of a cemented carbide grade and the challenge is to find the right balance between the components.

Prompted by global demand, Iscar has now expanded its Penta-IQ-Grip line with the inclusion of 22 and 32mm diameters. Both inserts are 2mm wide and are ideal for parting up to 22 and 32mm bar diameters.

• Innovative dovetail clamping structure ensures a most stable insert clamping • Excellent straightness and surface finish for parting applications • Clamping mechanism enables quick and easy cutting edge and insert indexing • Superior insert lifetime, twice the life of a double-sided insert • Enables machining at high machining parameters, resulting in reduced cutting time • C and J-type chipformer for a variety of machining and material applications • Produced from grade IC808G; a hard, fine grain substrate with excellent chipping resistance, TiAlN PVD coating. Provides high wear resistance • Size 22mm and 32mm can also be used on popular Swiss-type and small CNC machine tools

“This recognition highlights the importance of material and process development along with systematic work in grade development for success in metal cutting”, says Emmanuelle Göthelid.

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The GC 1130 uses a fine-grained cemented carbide with a high content of chrome together with a layer made with Zertivo™, Sandvik's unique production technology for PVD grades. This technology enables increased control over the manufacturing process, which is then carefully adapted to the grade-specific requirements. The result is a more stable product with longer cutting life, for increased customer benefit.

A dovetail wedge clamping system is designed to provide stable Penta-IQ-Grip insert clamping, secure edge indexing and rapid insert replacement. In addition, the robust structure enables the application of high machining parameters, resulting in reduced cutting time. The system is designed for enhanced straightness and surface finish characteristics in parting applications.

The cemented carbide grade that led to the win for Emmanuelle Göthelid and her colleagues is called GC 1130, is developed for steel milling and has a coating using the PVD-technique (Physical Vapour Deposition).

Penta-IQ-Grip inserts, featuring five cutting edges and available in 2 and 3mm widths, are designed for parting up to a 40mm part diameter or up to a 20mm depth of cut.

Following the successful introduction of the cost effective Penta-IQ-Grip 5 cornered D40 inserts, new users quickly appreciated the inserts’ performance, extended tool life and the resulting levels of profitability.

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“Innovation and constant product development are crucial for our continued success. The fact that GC 1130 is about to be the best selling cemented carbide grade in Sandvik Coromant's product family for mills is a tangible example of the link between investments in innovation and business benefits”, says Sandvik's President and CEO Björn Rosengren.

The new 22mm inserts feature a “J” type chipformer, whilst the 32mm inserts feature a “C” type chipformer and both sizes are available with neutral, left- and right-hand frontal edges. The new Penta-IQ-Grip inserts are mainly intended for efficient parting-off.

“It´s a great honor for us. Words can´t describe the feeling of being chosen for this year's Wilhelm Haglund medal, but unreality and pride are closest to hand, given the high level of the other nominated products”, says Emmanuelle Göthelid.

The development of a steel milling grade designed to give the customer a long insert tool life and stable production led to the award of the “Wilhelm Haglund Medal to the Product Developer of the Year” in 2018 to Karin Andersson, Björn Ericsson, Emmanuelle Göthelid and Marie Pettersson from Sandvik Coromant. The medal was presented in conjunction with Sandvik’s 2018 Annual General Meeting.

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