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1、St52-3铸钢非正常正火的组织和性能-???(?(??PTCA(PART:APHYS.TEST.)2007???x43??12?????)?1??St5223?????????c?????????????i???????e(?????????????H??????,????710043)??o???:???q?5???(??o-?????i??????o-????????o-????????????????????????St5223???????????0???????c???????????(??oP???????),St5223?????????a??
2、?????0?????????-?????p???i?????????????????i?????????????????L??oP?????????c??????????????????????,?(?i???ioP???y??:?????c????????;????;???????v???(????:TG142.1o?o?o????y?R???-:Ao?o?o??????5??:100124012(2007)1220608203ABNORMALNORMALIZINGMICROSTRUCTUREANDMECHAMICALPROPERTIESOFSt5223C
3、ASTSTEELBAIPei2qian(ShanxiHeavyAutomobileCo.Ltd.,XiLban710043,China)Abstract:Bymeansofchemicalanalysis,mechanicalpropertiestesting,scanningelectronmicroscopy,hardnesstestandmetallography,themicrostructureofabnormalnormalizingofSt5223caststeelwereanalysised.Theresultsshowedthattherew
4、ereblackpearlitenetsandneedleferriteinthecoarsegrainsoftheSt5223caststeelafterlowtemperaturenormalizing,whichhadmuchlowimpactandhighbrittleness.Keywords:Microstructureofabnormalnormalizing;Caststeel;Impactwork0o??t???????????C???u???????6???H?q???L????????oP?q???????????pSt5223???L?
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8、o??????(?????D???r?
