Lapho i-assy engenzi lutho ipholile, imifantu emhlophe ivame ukwakheka phezulu nezingxenye ezincane.
Isakhiwo somlomo omhlophe siqinile futhi siyashwabana, sinokucutshungulwa okungekuhle futhi kulula ukusixebuka.
Ngakho-ke, i-annealing (noma i-normalization) kufanele isetshenziselwe ukuqeda izicubu zomlomo omhlophe.Inqubo ye-annealing ithi: ukushisa ku-550-950 ℃ amahora angu-2-5, bese kupholisa isithando somlilo kuya ku-500-550 ℃ bese kuba ukupholisa komoya.Phakathi nenkathi yokubamba izinga lokushisa eliphezulu, isimende esinezinga lokushisa eliphezulu kanye ne-eutectic cementite zibola zaba i-graphite no-A, kanti i-cementite yesibili ne-eutectoid cementite nazo zibola ngesikhathi senqubo yokupholisa eyalandela, okuholela enqubweni ye-graphitization.Ngenxa yokubola kwe-cementite, ubulukhuni buyancipha, ngaleyo ndlela buthuthukise ukusebenza kahle.
Ukulungiswa kwe-iron ductile
Inhloso ye-ductile iron normalizing ukuthola ukwakheka kwe-pearlite matrix, ukucwenga okusanhlamvu kanye nesakhiwo esifanayo, ukuze kuthuthukiswe izakhiwo zemishini ye-Dandong castings yensimbi.Ngezinye izikhathi ukujwayelekile kubuye kube ukulungiswa kwe-ductile iron surface quenching esakhiweni, ukujwayelekile kuhlukaniswe izinga lokushisa eliphakeme elijwayelekile kanye nokushisa okuphansi kokujwayelekile.Izinga lokushisa eliphakeme elijwayelekile le-normalizing ngokuvamile alidluli ku-950 ~ 980 ℃, futhi izinga lokushisa eliphansi le-normalizing ngokuvamile lishisiswe libe yinani eliphelele lokushisa eligoqiwe elingu-820 ~ 860 ℃.Ngemuva kokujwayelekile, abantu abane ngokuvamile kudingeka babhekane nakho ukuze baqede ukucindezeleka kwangaphakathi okukhiqizwa ngesikhathi sokujwayelekile.
ukuqina kobuso
Ukuze uthuthukise ubulukhuni bobuso, ukumelana nokugqoka namandla okukhathala kwamanye amasondo omhlahlandlela, ukucisha indawo kungasetshenziswa.Kokubili insimbi empunga kanye ne-ductile iron castings ingaba lukhuni.Ngokuvamile, kusetshenziswa ukucisha indawo yokushisa ephezulu (emaphakathi) kanye nokucisha indawo yokuxhumana kagesi.
Igobolondo le-idle yesakhiwo sebhokisi lakhiwe futhi lakhiwe ngesihlabathi se-alkali phenolic resin noma inqubo yesihlabathi sengilazi yamanzi.Ngemuva kokujwayela kwe-matrix kanye nokwelashwa kokushisa okuphakathi kwe-matrix okuvala imvamisa emaphakathi, ukuqina kwendawo kufinyelela ku-HRC48-58, futhi ukujula kokuqina kungaphezu kuka-4-6mm (HRC45).Inokuqina kokumelana nomthelela omkhulu kanye nokumelana nokugqokwa ngenxa yezimo ezinzima zokusebenza.
Isikhathi sokuthumela: Apr-23-2022
