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1、重慶大學(xué)碩士學(xué)位論文攀鋼鋼錠模使用過(guò)程溫度場(chǎng)與應(yīng)力場(chǎng)數(shù)值模擬姓名:周安若申請(qǐng)學(xué)位級(jí)別:碩士專業(yè):材料學(xué)指導(dǎo)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
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