Izinqubo Zezici Zokusakaza Ngokunemba

Insimbi engagqwali ngokunemba ukunemba kugcwele amakhono esikhunta. Ukuze uthole ukukhishwa okuncane futhi okuyinkimbinkimbi, i-fluidity ephezulu iyadingeka, ngaphandle kwalokho, isikhunta sonke asikwazi ukugcwaliswa. Ukusakaza kuba umkhiqizo wokulahlwa. I-fluidity enembile yensimbi engagqwali ihlobene kakhulu nokwakheka kwamakhemikhali kanye nezinga lokushisa elithelayo. Isibonelo, ama-alloys anezingxenye ze-eutectic noma eduze nezingxenye ze-eutectic, kanye nama-alloys anebanga lokushisa elincane lomkhiqizo, ane-fluidity enhle; i-phosphorus ku-cast iron ingathuthukisa uketshezi, kuyilapho isibabule senza uketshezi lube lubi nakakhulu. Ukwenyuka kwezinga lokushisa lokuthulula kungathuthukisa uketshezi.

Njengoba ukuncipha kokunemba kwensimbi engagqwali kudlula kakhulu okusansimbi, ukuze kuvinjelwe imigodi enciphayo kanye nokukhubazeka kokuncipha ekubunjweni, izinqubo eziningi zokulingisa zisebenzisa izinyathelo ezifana nezikhuphukeli, i-iron ebandayo, kanye noxhaso ukuze kuzuzwe ukuqina okulandelanayo.

Ukuze uvimbele ukuvela kwama-shrinkage cavities, i-shrinkage porosity, ama-pores kanye nokuqhekeka kwensimbi engagqwali, ubukhulu bodonga kufanele bufane, amakhona abukhali kanye nezakhiwo ze-angle kwesokudla kufanele kugwenywe, i-sawdust yengezwe esihlabathini sokuphonsa, i-coke yengezwa. kuya enkabeni, kanye nohlobo olungenalutho Ama-Cores kanye nama-sand cores kawoyela ukuze kuthuthukiswe ukuphinda kusebenze kanye nokungena komoya kwesikhunta sesihlabathi noma ama-cores.

Ngenxa yokuntuleka kwe-fluidity yensimbi encibilikisiwe, ukuze kuvinjwe izithiyo ezibandayo kanye nokuthululwa okwanele kwezinsimbi zensimbi, ukuqina kodonga lwensimbi akufanele kube ngaphansi kuka-8mm; sebenzisa ukukhishwa okomile noma ukuphonsa okushisayo; ukwandisa ngokufanelekile izinga lokushisa elithululwayo, ngokuvamile ku-1520 ° ~ 1600 ° C , Ngenxa yokuthi izinga lokushisa lokuthulula liphezulu, insimbi encibilikisiwe inezinga eliphezulu lokushisa ngokweqile, futhi ihlala imanzi isikhathi eside, futhi uketshezi kungathuthukiswa. Kodwa-ke, uma izinga lokushisa elithelayo liphezulu kakhulu, lizodala ukukhubazeka okufana nezinhlamvu ezimahhadla, imifantu eshisayo, izimbotshana nokunamathela kwesihlabathi. Ngakho-ke, ngokujwayelekile ukunemba okuncane, okunodonga oluncane oluncane futhi okuyinkimbinkimbi, izinga lokushisa elithelayo limayelana nezinga lokushisa lensimbi elincibilikayo + 150 ℃; isakhiwo sesistimu yokuthulula silula futhi ubukhulu besigaba bukhulu kunokwensimbi; izinga lokushisa elithelayo lokubunjwa kwezindonga ezinkulu neziwugqinsi Licishe libe ngu-100°C ngaphezu kwendawo yalo yokuncibilika.