Makhalidwe a Njira Yakuponya Mwachindunji

Kuponyera kwachitsulo kosapanga dzimbiri kumadzaza ndi kuthekera kwa nkhungu. Kwa ma castings oonda komanso ovuta, madzi amadzimadzi amafunikira, apo ayi, nkhungu yonseyo sichitha kudzazidwa. Kuponyedwa kumakhala chinthu chotayika. The fluidity yeniyeni ya chitsulo chosapanga dzimbiri makamaka yokhudzana ndi mankhwala zikuchokera ndi kuthira kutentha. Mwachitsanzo, ma aloyi okhala ndi zigawo za eutectic kapena pafupi ndi zigawo za eutectic, komanso ma aloyi okhala ndi mtundu wocheperako wa kutentha kwazinthu, amakhala ndi madzi abwino; phosphorous mu chitsulo chotayirira akhoza kusintha fluidity, pamene sulfure kumapangitsa fluidity kuipiraipira. Kuwonjezeka kwa kutentha kwa madzi kungathe kusintha madzi.

Popeza kuchepa kwa chitsulo chosapanga dzimbiri kumaposa chitsulo chonyezimira, pofuna kupewa ming'oma ya shrinkage ndi kuwonongeka kwa shrinkage mu castings, njira zambiri zoponyera zimagwiritsa ntchito njira monga zokwera, chitsulo chozizira, ndi zothandizira kuti zitheke motsatizana.

Pofuna kupewa ming'oma ya shrinkage, shrinkage porosity, pores ndi ming'alu yazitsulo zosapanga dzimbiri, makulidwe a khoma ayenera kukhala ofanana, ngodya zakuthwa ndi zomangira zamanja ziyenera kupewedwa, utuchi umawonjezeredwa ku mchenga woponyedwa, coke imawonjezeredwa. mpaka pachimake, ndi dzenje mtundu Cores ndi mafuta mchenga cores kuti retreatability ndi mpweya permeability wa nkhungu mchenga kapena mitima.

Chifukwa cha kusauka kwachitsulo chachitsulo chosungunula, pofuna kupewa zotchinga zozizira komanso kuthira kosakwanira kwazitsulo zachitsulo, makulidwe a khoma lazitsulo sayenera kukhala osachepera 8mm; gwiritsani ntchito kuponyera kowuma kapena kuponyera kotentha; moyenerera kuonjezera kutentha kuthira, kawirikawiri 1520 ° ~ 1600 ° C , Chifukwa kutentha kuthira ndi mkulu, chitsulo chosungunula ali ndi digiri yapamwamba ya kutenthedwa, ndipo amakhala madzi kwa nthawi yaitali, ndipo fluidity akhoza bwino. Komabe, ngati kutentha kukutsanulidwa kwambiri, kungayambitse zolakwika monga njere zouma, ming'alu yotentha, pores ndi mchenga. Choncho, ambiri ang'onoang'ono, mipanda yopyapyala komanso yowoneka bwino yoboola pakati, kutentha kothira kumakhudza kutentha kwachitsulo + 150 ℃; dongosolo la kutsanulira ndi losavuta ndipo kukula kwa gawo ndi kwakukulu kuposa chitsulo choponyedwa; Kutentha kothira kwa zipilala zazikulu ndi zokhuthala ndi mipanda Ndi pafupifupi 100 ° C pamwamba kuposa malo ake osungunuka.