Abstract
Nowadays engine capacities of vehicles spread in a wide range due to different vehicle power demands. Power density of engines affects exhaust gas and therefore exhaust gas temperature varies from 650 °C to 1000 °C in exhaust manifolds. Depending on the exhaust gas temperature, different types of iron based alloys are used as manifold materials such as ferritic ductile cast irons (GGG40, SiMo), austenitic ductile cast irons (Ni-resist D5S), ferritic cast stainless steels (ACIHK30, AISI 409) and austenitic cast stainless steels (CF8C). In this study high temperature oxidation behavior of different cast alloys used as exhaust manifold materials like, (i) GGG40 ferritic ductile cast iron, (ii) SiMo ferritic ductile cast iron (iii) AISI 409 ferritic cast stainless steel and (iv) CF8C austenitic cast stainless steel, were investigated.
Highlights
Vehicle power demands are spread in a wide range due to the need of different engine capacities
Ferritic ductile cast irons, and ferritic stainless steels are used at lower temperatures while austenitic ductile cast irons and austenitic stainless steels are preferred at elevated temperatures [4,5]
Ferritic cast stainless steels can be used at respectively higher temperatures than ferritic ductile cast irons and Cr content in their chemical composition provides higher oxidation resistance
Summary
Vehicle power demands are spread in a wide range due to the need of different engine capacities. Depending on the exhaust gas temperature, different types of iron based alloys are used as manifold materials Among these alloys, ferritic ductile cast irons, and ferritic stainless steels are used at lower temperatures while austenitic ductile cast irons and austenitic stainless steels are preferred at elevated temperatures [4,5]. Ferritic cast stainless steels can be used at respectively higher temperatures than ferritic ductile cast irons and Cr content in their chemical composition provides higher oxidation resistance. The development of new austenitic stainless steels and Ni-resist austenitic ductile cast irons are in demand due to high thermal stability of austenitic matrix. In this study high temperature oxidation behavior of different cast alloys used as exhaust manifold materials like, (i) GGG40 ferritic ductile cast iron, (ii) SiMo ferritic ductile cast iron (iii) AISI 409 ferritic cast stainless steel and (iv) CF8C austenitic cast stainless steel, were investigated
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