Ngaphansi kwezimo ezijwayelekile, ukunemba kobukhulu bokuphonswa okunembile kuthinteka yizici eziningi ezifana nesakhiwo sokuphonswa, izinto zokuphonswa, ukwenza isikhunta, ukwenza amagobolondo, ukubhaka, ukuthulula, njll. Noma yikuphi ukusetha noma ukusebenza okungenangqondo kwanoma yisiphi isixhumanisi kuzoshintsha izinga lokuncishiswa kokuphonswa. Lokhu kuholela ekuphambukeni ekunembileni kobukhulu bokuphonswa ezidingweni. Nazi izici ezingabangela amaphutha ekunembileni kobukhulu bokuphonswa okunembile:
(1) Ithonya lesakhiwo sokukhipha: a. Ubukhulu bodonga lokukhipha, izinga lokuncipha okukhulu, udonga lokukhipha oluncane, izinga lokuncipha okuncane. b. Izinga lokuncipha kwamahhala likhulu, kanti izinga lokuncipha elivinjiwe lincane.
(2) Ithonya lezinto ezifakwayo: a. Uma okuqukethwe kwekhabhoni kuphezulu ezintweni ezisetshenziswayo, kulapho izinga lokuncipha eliqondile lincipha, futhi lapho okuqukethwe kwekhabhoni kuncipha, kulapho izinga lokuncipha eliqondile likhula khona. b. Izinga lokuncipha kokuphonswa kwezinto ezivamile lingokulandelayo: izinga lokuncipha kokuphonswa K=(LM-LJ)/LJ×100%, i-LM ingusayizi wesikhala, kanti i-LJ ingusayizi wokuphonswa. I-K ithintwa yizici ezilandelayo: isikhunta se-wax K1, isakhiwo sokuphonswa K2, uhlobo lwe-alloy K3, izinga lokushisa lokuthulula K4.
(3) Ithonya lokwenza isikhunta esilinganisweni sokuncishiswa okuqondile kwama-castings: a. Ithonya lokushisa lokujova i-wax, ingcindezi yokujova i-wax, kanye nesikhathi sokubamba ingcindezi kusayizi wokutshalwa kwezimali libonakala kakhulu ekushiseni kokujova i-wax, kulandelwe ingcindezi yokujova i-wax, futhi isikhathi sokubamba ingcindezi siyaqinisekiswa Ngemva kokuba utshalomali selwakhiwe, alunawo umthelela omkhulu kusayizi wokugcina wokutshalwa kwezimali. b. Izinga lokuncishiswa okuqondile kwezinto ze-wax (isikhunta) lingaba ngu-0.9-1.1%. c. Lapho isikhunta sokutshalwa kwezimali sigcinwa, kuzoba nokuncishiswa okwengeziwe, futhi inani laso lokuncishiswa lingaba ngu-10% wokuncipha okuphelele, kodwa uma ligcinwa amahora angu-12, usayizi wesikhunta sokutshalwa kwezimali uzinzile ngokuyisisekelo. d. Izinga lokuncishiswa kwe-radial kwesikhunta se-wax lingama-30-40% kuphela wezinga lokuncishiswa ngobude. Izinga lokushisa lokujova i-wax linethonya elikhulu kakhulu esilinganisweni sokuncishiswa okukhululekile kunezinga lokuncishiswa okuvinjelwe (izinga lokushisa elihle kakhulu lokujova i-wax lingu-57-59℃, Uma izinga lokushisa liphakeme, kulapho ukuncishiswa kuba kukhulu).
(4) Ithonya lezinto zokwakha amagobolondo: isihlabathi se-zircon, i-zircon powder, isihlabathi se-Shangdian kanye ne-Shangdian powder liyasetshenziswa. Ngenxa ye-coefficient yazo encane yokwandisa, yi-4.6×10-6/℃ kuphela, zinganakwa.
(5) Umphumela wokubhaka igobolondo: Ngenxa yokuthi i-coefficient yokwandisa igobolondo incane, lapho izinga lokushisa legobolondo lingu-1150℃, liyi-0.053% kuphela, ngakho-ke lingashaywa indiva.
(6) Ithonya lokushisa lokukhipha: lapho izinga lokushisa lokukhipha liphezulu, izinga lokuncipha liba likhulu, futhi lapho izinga lokushisa lokukhipha liba liphansi, izinga lokuncipha liba lincane, ngakho izinga lokushisa lokukhipha kufanele lifaneleke.
Isikhathi sokuthunyelwe: Novemba-15-2021