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1、铸造基本（Basiccasting）TalkingaboutinvestmentcastingprocessAbstract:Keyword：A:overviewofcastingCasting-smeltingmetal,makingmold,andpouringmoltenmetalintothemold,aftersolidification,toobtainacertainshape,sizeandperformanceofmetalpartsblankformingmethod.Castingisakindofhotmetalprocessingtechn
2、ologywhichhasarelativelyearlyhistory.Ithasbeenabout6000yearsold.Chinahasenteredtheheydayofbronzecastingaround1700BCto1000BC,andhasreachedafairlyhighlevelintechnology.Castingreferstotheliquidatroomtemperature,butsoonafterthesolidificationofthematerialintoaparticularshapeofthemold,tobeso
3、lidifiedintotheformofprocessing.Thecastmaterialismostlysolidbutheatedtoliquidmetal(copper,iron,aluminum,tin,lead,etc.),whilethemoldmaterialcanbesand,metal,orevenceramics.Themethodsusedwillvaryinresponsetodifferentrequirements.Two:CastingclassificationTherearemanykindsofcasting:Generals
4、andcasting,includingwetsandmold,drysandmoldandchemicalhardeningsandmold3kinds.Thespecialcasting,specialcastingpressmoldingmaterialscanbedividedintonaturalmineralsandasthemainmaterials(suchascasting,mudcasting,casting,vacuumcasting,shellmouldcastingworkshop,moldcasting,ceramicmoldcastin
5、getc.)specialcastingandmetalasthemainmaterials(suchasmetalmoldtypecasting,pressurecasting,continuouscasting,lowpressurecasting,centrifugalcasting,etc.)two.Inaccordancewiththemoldingprocesscanbedividedinto:1.gravitycasting:sandcasting,permanentmoldcasting.Moltenmoltenmetalispouredintoth
6、ecavitybygravity.2.pressurecasting:lowpressurecasting,highpressurecasting.Themoltenmetalisinstantaneouslypressedintothecastingcavitybyadditionalpressure.Thecastingprocessusuallyincludes:Themold(liquidmetalcastingsbecomeacontainersolidpreparation,mold)accordingtothematerialusedcanbedivi
7、dedintosand,metal,ceramic,clay,graphite,accordingtothefrequencyofusecanbedividedintosingletype,semipermanentandpermanentmoldpreparation,qualityisthemainfactoraffectingthequalityofcastingsthemeltingandcasting;castingmetalcasting,metal(alloy)maincastiron,caststeelandcastnonferrousalloy
