High-strength and easy-to-machine

New cast materials made of spheroidal graphite

Quelle/Source: Klaus Vollrath

1 Die Eisengieβerei Heger Guss in Enkenbach-Alsenborn • The Heger Guss iron foundry in Enkenbach-Alsenborn

Quelle/Source: Klaus Vollrath

Quelle/Source: Heger

2 2 „Die neuen Siron-Werkstoffe weisen neben hoher Festigkeit zugleich sehr gute Duktilitätswerte auf und eignen sich daher als Alternative insbesondere auch zu Stahlguss“, sagt Dipl.-Ing. Johannes Heger • “Besides high strength, the new Siron materials also exhibit very good ductility and are therefore suitable as an alternative especially to cast steel,” says Dipl.-Ing. Johannes Heger

Quelle/Source: Heger

3 Versuchsgussteil mit Wanddicken bis herab zu 10 mm • Test casting with wall thicknesses down to 10 mm

Quelle/Source: Heger

4 „Ein entscheidender Vorteil der neuen Siron-Werkstoffe im Vergleich zu den etablierten höherfesten Gusseisen mit Kugelgraphit liegt in der deutlich höheren Streckgrenze“ Dipl.-Ing. Hartwig Haurand • “A crucial advantage of the new Siron materials compared to the established higher-strength cast iron with spheroidal graphite is the much higher yield strength,” says Dipl.-Ing. Hartwig Haurand

Quelle/Source: Heger

Quelle/Source: Klaus Vollrath

5 Rund 4 t wiegt diese aus Siron-Gusseisen EN-GJS-600-10 hergestellte Nabe für einen im Bergbau eingesetzten Groβ-Radlader. Das Teil wird inzwischen mit Stückzahlen von jährlich 300-700 Stück in Serie gegossen • This hub made of Siron cast iron EN-GJS-600-10 for a big wheel loader used in the mining industry weighs around 4 t. The part is now cast in series in unit numbers of 300 – 700 hubs per annum

Quelle/Source: Klaus Vollrath

Quelle/Source: Heger

6 Vergleich des ferritischen Gefüges eines Siron EN-GJS-600-10 mit dem Gefüge eines EN-GJS-700-2 mit hohem Perlitanteil. Geätzt, V= 100x • Comparison of the ferritic microstructure of a Siron EN-GJS-600-10 with the microstructure of an EN-GJS-700-2 with a high pearlite content. Etched, V= 100x

Quelle/Source: Heger

Quelle/Source: Komatsu

7 Die aus Siron-Gusseisen hergestellten Radnaben kommen in den Hinterachsen dieser riesigen Muldenkipper für den Bergbau zum Einsatz • The wheel hubs made of Siron cast iron are used in the rear axles of these huge dumper trucks used in the mining industry

Quelle/Source: Komatsu

Quelle/Source: Heger

8 Für die Siron-Gusswerkstoffe stehen auch bereits die erforderlichen Technologiedaten für gieβtechnische Simulationen zur Verfügung • For the Siron cast materials, the technological data needed for casting simulations are already available

Quelle/Source: Heger

Erfolgsgeheimnis Ferritgefüge # Secret of success – ferrite microstructure

In the iron-based cast materials sector, the introduction of a new materials group tends to be a rare event. The interest of designers in the new group of high-strength cast iron with spheroidal graphite presented here should therefore be commensurately high. For the production and processing of the new materials, which have already been included in the relevant standards (DIN EN 1563), there are already tried-and-tested process paths in series manufacture. Their interesting properties and excellent castability opens up new degrees of freedom for designers in plant and machine engineering, e.g. for the substitution of cast and welded steel structures.

“Thanks to intense collective work in materials development and standardization, a new family of iron cast materials with outstanding usage properties has recently been launched,” says Dipl.-Ing. Johannes Heger, Managing Partner at HegerGuss GmbH in Enkenbach-Alsenborn. The new materials that boast high strength combined with improved toughness fill the gap between the higher strength cast iron with spheroidal graphite and steel casting materials. Thanks to their special properties, the new cast iron grades are suited to many applications especially in machine and plant engineering as an...