Effects of strain ageing on the microstructures of microalloyed steels-中国Betway体育网页登陆

摘要 Thisstudyinvestigatesthemicrostructuresofmicroalloyedsteelsbeforeandafterstrainageingtreatment.Itwasfoundthatthemicrostructureconsistedofbothlathferriteandpearlite.Mostofthecarbidesand/ornitridesofmicroalloyingelementsweredistributedinsidethegrainswithasmallamountdistributedatthegrainboundaries.Theprecipitatedphasesinsidethegrainsweremuchsmallerinsizethanthoseatthegrainboundaries.Theprecipitatesareeithercircularorshortbar-like,ofsizesfromafewnanometerstoseveralhundrednanometers.Afterageing,onlycarbonatomssegregatearoundthedislocationsandnitrogendoesnotparticipateinproducingtheCottrellatmospherebecauseitwasfixedbyalloyingelementsbeforeageing.

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Effects of strain ageing on the microstructures of microalloyed steels

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