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BDG Informationszentrum<br />
Eisengusswerkstoffe<br />
Dokumenten-Nummer: 57764<br />
Zeitschriftenaufsatz<br />
Thorbjörnsson, I. u.a.<br />
Publikationssprache: Englisch<br />
OPTICA – functional gradient of local properties in ductil iron<br />
OPTICA – Funktionsgradient von lokalen Eigenschaften in Gusseisen mit Kugelgraphit<br />
Optimisation of local poperties of ductile iron castings with a new insert technique has shown to be effective for<br />
increasing wear resistance of cast iron. The method is based on an insert technique that allows modification of local<br />
properties such as hardness in pre-determined locations within a casting. Increased hardness has been ontained both<br />
at the surface and within the casting. Locally optimised castings were produced and tested in laboratory and in real<br />
use. The effect of bainitic heat treatment (austempered ductile iron - ADI) on hardness of the Optica material is<br />
measured and discussed. The effect of ADI treatment on diffusion of alloying elements interacting with carbon from the<br />
melt is also discussed. A conventional ultrasonic thickness gauge meter was used to measure the location of the<br />
functional gradient material. Transverse rupture strength was measured and compared with unalloyed ductile iron and<br />
heat treated castings. Wear tests on trawl hatch shoes showed improved werar resistance of the locally alloyed<br />
material.<br />
Innovation Center Iceland and Reykjavik University, IS<br />
Foundry Trade Journal International<br />
Erscheinungsjahr 2013<br />
Heftnummer 3701<br />
S. 23-27 (5 Seiten, 8 Bil<strong>der</strong>, 2 Tabellen, 13 Quellen)<br />
Eisengusswerkstoffe<br />
Dokumenten-Nummer: 57917<br />
Zeitschriftenaufsatz<br />
Thorbjörnsson, Ingolfur; Johannesson, Birgir; Thor, Jon<br />
Publikationssprache: Englisch<br />
OPTICA - functional gradient of local properties in ductile iron<br />
OPTICA - Funktionsgradient lokaler Eigenschaften in Weicheisen<br />
Optimisation of local properties of ductile iron castings with a new insert technique has shown to be effective for<br />
increasing wear resistance of cast iron. The method is based on a insert technique that allows modification of local<br />
properties such as hardness in pre-determined locations within a casting. Increased hardness has been obtained both<br />
at the surface and within the casting. Locally optimised castings were produced and tested in laboratory and real use.<br />
The effect of bainitic heat treatment (austempered ductile iron - ADI) on hardness of the OPTICA material is measured<br />
and discussed. The effect of ADI treatment on diffusion of alloying elements interacting with carbon from the melt is<br />
also discussed. A conventional ultrasonic thickness gauge meter was used to measure the location of the functional<br />
gradient material. Transverse rupture strength was measured and compared with unalloyed ductile iron and heat<br />
treated castings. Wear tests on trawl hatch shoes showed improved wear resistance of the locally alloyed material.<br />
These results are confirmed by laboratory wear tests done elsewhere.<br />
University of Iceland, Reykjavik, IS; Thorgrimsson, Malmsteypa Thorgrims Jonssonar, IS<br />
Foundry Trade Journal International<br />
Erscheinungsjahr 2013<br />
Heftnummer 3701<br />
S. S.23-27 (5 Seiten, 8 Bil<strong>der</strong>, 2 Tabellen, 13 Quellen)<br />
<strong>Giesserei</strong> <strong>Literaturschau</strong>
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