High alloy iron, use of the material for structural...

Details High alloy iron, use of the material for structural... High alloy iron, use of the material for structural...

C - Chemistry, Metallurgy

22

C

C22C 37/08 (2006.01)

Patent

CA 2599091

The invention relates to a high alloy iron that has an austenitic structure and a spherical graphite configuration and comprises the following components in percent by weight: carbon < 2.0 %, silicon 2.0 - 6.0 %, nickel 29 - 36 %, chrome 1.0 - 2.5 %, niobium 0.1 - 1.0 % and molybdenum 0.1 - 2.5 %. The invention also relates to the use of the cast iron material for structural components that are subject to high thermal stress, especially for exhaust manifolds and turbocharger housings of internal combustion engines of the individual or integrated type of construction. The invention finally relates to a structural component that is subject to high thermal stress, especially the exhaust system of an engine consisting of the aforementioned cast iron material.

L'invention concerne un matériau de fonte de fer fortement allié présentant une structure austénitique et une configuration graphite sphérique, contenant les constituants suivants en % en poids : carbone < 2,0 % ; silicium 2,0 - 6,0 % ; nickel 29 - 36 % ; chrome 1,0 - 2,5 % ; niobium 0,1 - 1,0 % ; et, molybdène 0,1 - 2,5 %. L'invention concerne également l'utilisation de ce matériau de fonte de fer pour des composants soumis à des contraintes thermiques élevées, notamment des collecteurs de gaz d'échappement et des carters de turbocompresseurs de moteurs à combustion interne en construction individuelle ou intégrée. L'invention concerne également un tel composant soumis à des contraintes thermiques élevées, notamment un composant du système de gaz d'échappement d'un moteur, réalisé dans le matériau selon l'invention.

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