Xa i-assy engasebenziyo ipholile, iintanda ezimhlophe zihlala zibunjwa kumphezulu kunye namacandelo amancinci.
Isakhiwo somlomo omhlophe siqinile kwaye si-brittle, kunye nokusebenza kakubi kokucubungula kwaye kulula ukuyixobula.
Ke ngoko, i-annealing (okanye i-normalization) kufuneka isetyenziswe ukuphelisa izicubu zomlomo omhlophe.Inkqubo yokufakwa kwe-annealing yile: ukufudumeza ukuya kwi-550-950 ℃ iiyure ezi-2-5, emva koko ukupholisa kwi-500-550 ℃ kunye nokupholisa umoya.Ngexesha lokubamba ubushushu obuphezulu, i-cementite yobushushu obuphezulu kunye ne-eutectic cementite yachithwa kwi-graphite kunye ne-A, kunye ne-cementite yesibini kunye ne-eutectoid cementite nayo ibolile ngexesha lenkqubo yokupholisa elandelayo, okubangelwa inkqubo ye-graphitization.Ngenxa yokubola kwe-cementite, ubunzima buyancipha, ngaloo ndlela buphucula ukucwangciswa.
Ukulungiswa kwe-iron ductile
Injongo ye-iron ductile normalizing kukufumana isakhiwo se-matrix pearlite, ukucokisa iinkozo kunye nesakhiwo esifanayo, ukwenzela ukuba kuphuculwe iimpawu zemishini ye-Dandong castings yensimbi.Ngamanye amaxesha i-normalizing ikwangulungiselelo lwe-ductile iron surface quenching kwisakhiwo, i-normalizing yahlulwe ibe yi-normalization yobushushu obuphezulu kunye nobushushu obuphantsi.Ubushushu obuphezulu obuqhelekileyo beqondo lobushushu alidluli kuma-950 ~ 980 ℃, kwaye iqondo lobushushu eliphantsi eliqhelekileyo lifudunyezwa ngokubanzi kuluhlu lobushushu olusongwayo oluyi-820 ~ 860 ℃.Emva kokuqhelekileyo, abantu abane ngokubanzi bayafuneka ukuba bajongane nayo ukuze baphelise uxinzelelo lwangaphakathi oluveliswa ngexesha lokuqhelekileyo.
ukuqina komphezulu
Ukuze kuphuculwe ubulukhuni bomphezulu, ukumelana nokunxiba kunye namandla okudinwa kwezinye iindibano zamavili esikhokelo, ukucinywa komphezulu kungasetyenziswa.Zombini intsimbi engwevu kunye nentsimbi edityanisiweyo inokwenziwa lukhuni.Ngokubanzi, ukucima umphezulu (ophakathi) wokufudumeza okuphakamileyo kunye nokucinywa komphezulu wombane kusetyenziswa.
Iqokobhe lohlobo lwebhokisi idler imile kwaye yenziwe ngesanti ye-alkali phenolic resin okanye inkqubo yesanti yeglasi yamanzi.Emva kokuqheleka kwe-matrix kunye nomgangatho kaloliwe ophakathi kokunyanzeliswa kokucima ubushushu, ubulukhuni bomphezulu bufikelela kwi-HRC48-58, kwaye ubunzulu bokuqina bungaphezulu kwe-4-6mm (HRC45).Inokuqina kokumelana nempembelelo ephezulu kunye nokumelana nokunxiba ngenxa yeemeko ezinzima zokusebenza.
Ixesha lokuposa: Apr-23-2022
