真空微重力熔炼铝锂合金

耿桂宏,达道安,郝维新,张天平(兰州物理研究所,甘肃兰州　730000):,,,:;;;:O314;TF13:A:1006-7086(2003)02-0081-04VACUUMMELTINGOFAl-LiALLOYUNDERTHEMICRO-GRAVITYCONDITIONGENGGui-hong,DADao-an,HAOWei-xin,ZHANGTian-ping(LanzhouInstituteofPhysics,Lanzhou730000,China)Abstract:Al-LiAlloysweremeltedandcastwithelectricmagneitcmicro-gravitysimulationfacility.Thefac-tors,whichinfluencedthequalityAl-Lialloyingotsuchascruciblematerial,heatingtemperature,vacuumdegreeandheatpreservationtimeandgasprotectionwereinvestigated.ItshowedthattheimpuritycontentoftheAl-Lialloycouldbecontrolledeffectivelybytakingpropertechnicalmeasuresandthequalityoftheingothadbeenen-hanced.Keywords:aluminium-lithiumalloy;vacuum;micro-gravity;qualityofingot1,,,3%,,,5%10%,[1],,,,,,22.1　坩埚材料的确定:,,:2002-11-12.:(1964-),,,,8192200306Vacuum&Cryogenics,,,,,XPS,,2,(1),,(2)1CXPS2CXPS2.2　加热温度的确定,,,760(3)32.3　真空度的确定,NaCO,,,,,(LiO2),90704010Pa490Pa,(4),,KNaCa;70Pa,(5),NaK,,70Pa,,323,10Pa,700,,10Pa,30040Pa2.4　保温时间的确定,,30min30min,40min,182924OXPS5OXPS1/min/min10301535202.5　气氛保护的选择,2(6),,1(7)6AlXPS7AlXPS35.0%7.5%10.0%33.1　金相测试JSM-5600LV,(810)3.2　力学性能测试(99%)(99%),,83:285.0%LiSEM97.5%LiSEM1010.0%LiSEM2/%b/MPas/MPa5k/Jcm-25.0179.4154.63.341.677.5194.7188.22.852.2510.0197.9186.52.451.864(1),5%10%(2),,(3),:[1]DADAOAN,JIANGWANGSHUN,WANGYUMIN,etal.Anewmethodforprocessingmonotecticalloysundersimulatedmicrogravityconditionsusingelectro-magneticfieldsoneart[c][R].Chicago:4thInternationalConferenceonExperimentalMethodsforMicrogravityMaterialScienceResearch.1992.3341.,,(),,,8492