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ID:36537941
大小:1.99 MB
页数:5页
时间:2019-05-11
《低碳钢奥氏体在不同条件下变形时的变形行为》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、¦¾0¿À²ÁdeijgmÂ1mÃÄ4-251!"&$%ij'ij1112¼½~[(1xaÉquJº$Ã7Þ, 100083;2xaÉJºÉOk«É!, 100083)-1de78Gleeble1500=>ÝÞ²GHÛ±%,VZ7Þ,?@(Og121000~750℃、001~1sIJèVZÙ=VZHw。?@»ßÎ3:2>V"-)éÙ,>Ì>VÜnùúZVPI=yO':;d»CØÕ:;¾ÄØ:;ÁVØV,:;¾ÄØ:;ÁVØÜn=VPIOtA3PI。ZV{w50%Ù,ùú>V"-=û±,2A3PINRÛs^xÄd0
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3、@:;ÁV;ùú>V"-=yOø/>VyO,:;d»C、x~Áij=:;ÁVAÿ=>ZV{yO。fghOg1ÁijPI:;ÁV:;d»CDeformationBehaviorsofAusteniteinaLowCarbonSteelunderVariousConditions1112ZouMing LiLongfei SunZuqing YangWangyue(1TheStateKeyLaboratoryforAdvancedMetalsandMaterialsUniversityofScienceandTechnologyBeijing,Be
4、ijing,100083;2SchoolofMaterialsScienceandEngineering,UniversityofScienceandTechnologyBeijing,Beijing,100083)-1Abstract Thehotdeformationofausteniteinalowcarbonsteelinthetemperaturerangesof1000~750℃at001~1swereinvestigatedbyuniaxialcompressiontestsonaGleeble1500thermalsimula
5、tiontestmachine.Theresultsshowthat,atacertainstrainrate,withthedecreaseindeformationtemperature,thetypeofstressstraincurveschangedfromdynamicrecrystallizationonetodynamicrecoveryone,andtodynamictransformationoneattemperatureslowerthanA3point.Atthereductionof50%,withtheincrea
6、seinstrainrate,dynamictransformationofaustenitecouldtakeplaceatatemperaturearoundA3pointwiththedriveforcesuppliedbydeformationstoredenergy.Withthedecreaseinstrainrate,thepeakstrainofstressstraincurveswasdecreased,i.e.thecriticalstrainfordynamicrecrystallizationofausteniteor
7、dynamictransformationofundercooledaustenitewasdecreased.Keywords lowcarbonsteel,austenite,temperature,dynamictransformation,dynamicrecrystallization
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