Cast ironshaveplayedanimportantroleinthedevelopmentofthehumanspecies.Theyhavebeenproducedinvarious compositions forthousandsofyears.Mostoftentheyhavebeenusedintheas-castformtosatisfystructuralandshape requirements. Themechanicalandphysicalpropertiesofcastironshavebeenenhancedthroughunderstandingofthefunda- mental relationshipsbetweenmicrostructure(phases,microconstituents,andthedistributionofthoseconstituents)andthe process variablesofironcomposition,heattreatment,andtheintroductionofsignificant additivesinmoltenmetalprocessing. The interestedreaderisreferredtocompilationsofmicrographsofallofthemanydifferenttypesofcastiron(Davis, 1996, pp. 356–381). Someexamplesareshownin Figure 1. Graphiteelements(black)withdifferentshapeareembeddedinametal matrix withamicrostructurethatdependsonthealloychemicalcomposition,thecastingconditionsandtheheattreatments. This articleexaminestherelationshipsbetweenmicrostructure,processing,andpropertiesofgraphiticcastirons.Abrasion-, corrosion-, andheat-resistantironsarespecialtygradeswhicharenotdiscussedhere.Informationaboutthesegradescanbefound in specialtyhandbooks(e.g., Davis, 1996).
Cast Irons
IACOVIELLO, Francesco
2016-01-01
Abstract
Cast ironshaveplayedanimportantroleinthedevelopmentofthehumanspecies.Theyhavebeenproducedinvarious compositions forthousandsofyears.Mostoftentheyhavebeenusedintheas-castformtosatisfystructuralandshape requirements. Themechanicalandphysicalpropertiesofcastironshavebeenenhancedthroughunderstandingofthefunda- mental relationshipsbetweenmicrostructure(phases,microconstituents,andthedistributionofthoseconstituents)andthe process variablesofironcomposition,heattreatment,andtheintroductionofsignificant additivesinmoltenmetalprocessing. The interestedreaderisreferredtocompilationsofmicrographsofallofthemanydifferenttypesofcastiron(Davis, 1996, pp. 356–381). Someexamplesareshownin Figure 1. Graphiteelements(black)withdifferentshapeareembeddedinametal matrix withamicrostructurethatdependsonthealloychemicalcomposition,thecastingconditionsandtheheattreatments. This articleexaminestherelationshipsbetweenmicrostructure,processing,andpropertiesofgraphiticcastirons.Abrasion-, corrosion-, andheat-resistantironsarespecialtygradeswhicharenotdiscussedhere.Informationaboutthesegradescanbefound in specialtyhandbooks(e.g., Davis, 1996).I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
