攀鋼鋼錠模使用過程溫度場與應力場數值模擬.pdf

1、重慶大學碩士學位論文攀鋼鋼錠模使用過程溫度場與應力場數值模擬姓名：周安若申請學位級別：碩士專業(yè)：材料學指導教師：周上祺20000601堊壅奎堂堡圭蘭垡堡苧壘壘!!墜蘭!ABSTRACTYetthecontinuouscastingisamajorandnewtechnologythatisdevelopingquicklythemouldcastingwillbestillaliveaccordingtoitsdistinguishin

2、gfeaturesandournationalconditionSoitiSimportantteducetheconsumptionoftheingotmouldanditmustbestudiedasamajorquestionThisthesis，whichiSaimedattheingotmouldofthePanzhihuaSteelandIronCompanyhavenumericallysimulatedtheworkco

3、urseofthemouldwithfiniteelementanalysismethodandcomputerTheresultwascomparedwiththeexperimentaloutcomesInadditions，themechanismofthemould’SfatiguealsodiscussedinthispaperTheresultofthetemperaturefieldsimulationrevealedth

4、efollowingfacts：attheinitiativeofthecasting，(about10minafterthesteelfillingthemould)，thetemperatureoftheinnerwallofingotmouldincreasedsteadilyamongwhichtheoneofthemould’ScomeriSthefastest～reachitshighesttemperature(792C)

5、atthistimeTheimmediatefollowingincreaserateiSthatofthewidesidewhichreacheditshighesttemperature(907“C)atabout80minaftercastingTheincreaserateofnarrowsideiStheslowestwhichreacheditstemperaturepeakafterl10minThroughoutthep

6、rocess，temperatureoftheouterwallofthemouldincreasecontinuouslyandtheregularityoftemperaturechangeofthewidesidethenarlowsideand曲ecorneraresimilartheonlydifferencebetweenthemiSfiguresInotherwordthedifiereneeiSthatthehighes

7、ttemperatureofthemis706。C，696“Cand619“CrespectivelyAllthefactsaboveagreedwiththelanedrawingfromtheexperimentAccordingtotheresultsofthestressfieldsimulationtheinnerWallofthemouldbearspressstressandtheouterwall，tensionstre

8、ssThebiggesttensionstress(130MPa)appearbetweentheouterofwidesideandtheouterofcorneratthetimeof10minThecracksensitivitycoefficientiS038atthistimeandthecracksensitivityofthenarrowsideandthecornerislowerthanthatofthewidesid

9、eAlongwiththeincreaseoftime，thecracksensitivityCDCfficientincreased，againstthedecreaseofstress，reachedtO041atthewidesideatthetimeof170minThestressoftheouterwallofthewidesideiSbiggerthanthatofthenarrowside、Theresultdiscus