Ladilikan dɔw bɛ sɔrɔ ka ɲɛsin centrifugal castings qualités ma .
ka bɔ fiɲɛ-nɛnɛ-nɛnɛ-sɔgɔli la.
Daminɛ kuma:
Ni-resist groove insert manufacture ye ka carousel type centrifugal casting machines sɔrɔ ni dies ye fo ka se a seko ma, ani min bɛ se ka kɛ ni automatique control ye RPM, température ani cycle time. large volume reputed manufacturers bɛ baara kɛ caman na 2-meter dies{{3} time-water-cooling is abord temperature of the die from end from end{{{{{{{{{{5}.
Ka jɔnw ka fɛnw dilan walima ka taa musaka dɔgɔman dilanbagaw la, santirifugali masin minnu bɛ kɛ caman na, olu ka dies surunw janya ye milimɛtɛrɛ 300 ye ni ji nɛnɛ tɛ. Kɔlɔsili bɛ gɛlɛya ka taa a fɛ, kɛrɛnkɛrɛnnenya la, dagaw kɔfɛla la, k’a sababu kɛ solidifikali teliya ye{{3} daga ɲɛfɛ bɛ to funteni na ka tɛmɛ, ka surunya nɛgɛ funteni na min bɛ bɔn ni nɛgɛ ye.
Walasa ka dondaw ka mikro-yɔrɔko ɲuman ni u sabatili sɔrɔ o daga suguw la, k’a ta a dakun kelen na ka taa dakun wɛrɛ la, sariyakolo nɔgɔman dɔw ka kan ka tugu ɲɔgɔn kɔ ni gɛlɛya ye u dilanni taabolo la.
Labɛnni nɔgɔman:
Fɛn minnu bɛ kɛ ka fɛnw don, olu doncogo:
Nikɛri kɛmɛsarada la nin fɛn in na, o bɛ a ɲini ani ka a wuli ka ɲɛ ani ka a ɲagami cogo ɲuman na min bɛ se ka kɛ. min bɛnnen don kosɛbɛ o baara kama, o ye frequency induction furnace ye min ka dɔgɔn ni hakɛ ye 500-kg ani a ka fisa 1000-kg seko.
Fɛn minnu bɛ don, olu ka kan ka saniya cogo bɛnnen na. karɔti dilanfɛnw i n’a fɔ MO, VA, TI ani W ka kan ka mara taamasiyɛnw na. Kɔlɔsili: Jagokɛyɔrɔ nɛgɛ caman bɛ MO ni TI caman sɔrɔ, a ka ɲi kosɛbɛ ko nin fɛn ninnu ka kan ka kɔlɔsi dan ninnu kɔnɔ:
MO > 0,05% .
TI > 0,04% .
W > 0,02% .
VA > 0,02% .
Steel Scrap ye tramp elements sɔrɔyɔrɔ ye min bɛ se ka gɛlɛya minnu tɛ se ka fɔ ka ɲɛ ni-resist fɛnw na. Nɛgɛ scrap ka kan ka dan hakɛ 10% max la ka se a seko ma ani a bɔyɔrɔ ni a labɛncogo dɔn.
chips ni borings fana ka kan ka to ka dɔgɔya cogo bɛɛ la, ni u tɛ se ka u yɛrɛ tanga u ma pewu .. A ka ɲi ka dan ninnu dan na 60% ma wa a ka kan ka ja ani ka saniya.Mixing chips informly in the melt is gɛlɛn. Fɛn dɔw bɔnɛni minnu bɛ bɔ pucew la olu ka bon ani fiɲɛ ni hidrɔzɛni minɛcogo farati bɛ chips kɔnɔ, olu fila bɛɛ bɛ graphite jugu ni coarse/clustered carbides. sabati.
Kibaru min bɛ wuli la, o ka kan ka kɛ yɔrɔ fitinin dɔ la. A ka kan ka mara 0.06% lamini na walasa ka gɛlɛya ɲininen sɔrɔ. Sulfur sanfɛta bɛ gɛlɛyaw lase mikro-sɛnɛ ma.
Karɔbɔni min bɛ bɛn o ma:
Karɔbɔli hakɛ ( CE ) dɔnna ko a ye paramɛtiri kɔrɔlen ye nɛgɛw la minnu bɛ kɛ ka fɛnw kɛ. Nin ko in jɔyɔrɔ ka bon kosɛbɛ mikrostruktɛri suguya la min labɛnna casting kɔnɔ. A bɛ tali kɛ ɲɔgɔn na kosɛbɛ ni solidification hakɛ ye, o min bɛ nɔ bila castings ni temperatures{{{
Lajɛba bɛɛ lajɛlen ye ka CE hakɛ jate ka kɛɲɛ ni hakɛ/yɔrɔ hakɛ (V/S) hakɛ ye min bɛ kɛ ni casting. ye 3-jatebɔw la, minnu ye ɲɔgɔndanw ye minnu tɛ kelen ye, o ka gɛlɛn kosɛbɛ. Santirifugal pots, hali ni 3- cɛmancɛ ye, o ye kɔ ye simetriki yɔrɔ bɛɛ la, a bɛ se ka kɛ cogo min na nin waati in na, a janya ni o la, a bɛ se ka kɛ cogo min na nin waati in na, a bɛ se ka kɛ cogo min na.
Volume / surface area ratio v/s .
V/S = ( D2 - d2 ) H / 4 ( DH + DH + ( D .2 - d2 ) / 2 )
yɔrɔ min na, d=kɛnɛma cɛmancɛ ( od ) min bɛ kɛ centrifugal cast pot la .
D=kɔnɔna cɛmancɛ ( i.d. ) santirifugali daga kɔnɔ .
H=Santirifugali daga janya .
Fɛn min ka fisa ni centrifugal cast pot ye, o bɛna kɛ saturasiyɔn hakɛ ye, min bɛ di formula fɛ:
Degree de saturation . Sc :
;
Yɔrɔ min na, C, Si ani Ni ye nafa lakikaw ye girinya-% la .
An ka baarakɛminɛnw kama, S nafa ɲininen .c = 0,80 - 0,95
Ni aw ye cemɛtiri sigi foro la, o bɛna kɛ sababu ye ka karɔbɔni ni siliyɔmu hakɛ kunbɛn teliya la ani teliya la nɛgɛ kɔnɔ sani aw ka dagaw fili.
C, SI & MN hakɛ min bɛ fɔ ka ɲɛ, o bɛ kɛ ka ɲɛ:
Kabɔn: 2,70 – 2,80% .
Silikon: 2,10 – 2,20% .
Manganɛsi: 1,20 – 1,30% .
A bɛ wuli ka bɔ a nɔ na:
A nafa ka bon ka charge chargement stratifier ka don foro kɔnɔ walasa ka ni-resist material hakɛ caman ɲagami ni-resist material{. input material charging sequence ye ka fɔlɔ ka 50% donsokɛ nɛgɛ + scrap, ani ni a bɛ dɔrɔn ka a fara nickel, ferro alloys, carbone, ani a laban na ni balannako 50 ye{5}.
Kabon ka kan ka mara a daminɛ na baarakɛyɔrɔ la 2.75 - 2.80%, Ni la 14.5 -15%, siliyɔmu na 1,8 – 1,9%, chromium at 1.15 –1.2%, mn at 1.2 – 1,25%
Silicon carbide jɔyɔrɔ:
Walasa ka nucleation sites bɛrɛbɛrɛw sabati melt kɔnɔ, SIC jɔyɔrɔ ka bon. O la Sic ka kan ka kɛ charge fɔlɔ make-up jatebɔ yɔrɔ dɔ ye. ani sic farali wɛrɛw mago bɛ ka sɔrɔ ka fɛnɲɛnamafagalan sumaya kosɛbɛ, ni chimie sɛgɛsɛgɛra ani ni a sɔnna Wa fana, ladles damadɔw kelen-kelen bɛɛ lajɛlen kɔfɛ, walasa kabon dɔgɔyali ka sara. o bɛna dɛmɛ ka dan gɛrɛgɛrɛw sɔrɔ kabon hakɛ la ani o la CE ni microstructures bɛ bɛn ɲɔgɔn ma.
SIC hakɛ min bɛ fɔ charge make-up kɔnɔ o ye 0.25% ye charge total la ka fara alloying elements kan min bɛ fara charge kan. Nin farali in bɛ jate charge make-up la kabon ni silicon. melt se temperature 1400c, chemistry is checked and corrections accessed, ani recheck{12} 0,1% SIC bɛ fara a kan ani o yɔrɔnin bɛɛ la, foro bɛ na ni a dafalen ye ani a wulilen bɛ sumaya kosɛbɛ fo ka se baarakɛ funteni ma (a ka c’a la, 1480 –1500 C, ka kɛɲɛ ni funteni jigin ye min bɛ makɔnɔ waati min na ka don die la, o bɛ dafa ka bɔ ladle kelen-kelen bɛɛ la), ani ka bɔ ka kɛ ladle daminɛ ye min bɛ kɛ ka ɲɛ.
Addition of SiC must be done also at regular intervals during the pouring cycle for replenishing the carbon losses. In order to assess the exact requirement of quantity and timing of SiC additions for a given melting set-up and operating conditions, it is best to run several closely monitored heats for carbon drop with time. In a continuing production mode, checking the carbon content in each ladle tapped will give sufficient data to determine when the carbon drops off more than 0.05% o waati la, SIC hakɛ jatebɔlen ka kan ka fara foro kan, ka a to a ka min miniti damadɔ ka sɔrɔ ka tɔnɔ sɔrɔ.
Ladle fa ni a boloci:
Sani ladle o ladle ka bila a bɔyɔrɔ la a ka kan ka sumaya kosɛbɛ walasa a kɔnɔna ka ja ka ɲɛ ani ka a sumaya ni a bɛ se ka kɛ ni torch tasuma ye min bɛ baara kɛ. sumaya laban min bɛ kɛ shift daminɛ na ani ni lafiɲɛ don kɔfɛ ka kɛ ni relaten nɛgɛ ye ka bɔ foro la. ka tɛmɛ reladling kan ka se ka na ni 750 ye min wajibiyalen don ka na ni a hakɛ ye min wajibiyalen don ka se ing is 100 ma. Baarakɛcogo. Pyrometer contact ka kan ka kɛ walasa ka a dɔn ko funteni bɛ bɛn.
Teori la, NI fɛn caman bɛ u yɛrɛ labɛn. nka an ka dakunw na minnu bɛ kɛ ni centrifugal castings ye ani controls rigid kan microstructure kan, a ka ɲi ani a ka kan ka kɛ ka inoculation kɛ ladle kɔnɔ ni a bɛ se ka kɛ waati ye min bɛ se ka kɛ i n’a fɔ a bɛ se ka kɛ ni. operaction for inoculation with high grade Ferro silcicon ( 75 % % % in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in in to membrating for membre ferro silcion 0.25 % SI pick- up. A ka ɲi aw kana baara kɛ ni nɛgɛ inoculants conventionnels ye i n’a fɔ superseed nin fɛn in na ka da a kan strontiyɔmu bɛ a bali.
Dugukolo minnu man ca, olu jirali bɛna an ka microstructure ({0}} dɛmɛ ka se ka baara kɛ ni inoculant reseed ɲuman ye, ni cerium ye, o bɛ se ka sɛgɛsɛgɛ.
Fana nikɛri-mag hakɛ kɔrɔsilen min donna ni inoculant ye, o bɛ se ka nɔba bila grafite nɛnɛman na.
A sara:
Desɛn:
Ji-nɛnɛ min bɛ kɔrɔsi, o ka ɲi walasa ka die funteni kelen sɔrɔ ka bɔ a dakun kelen na ka taa dakun wɛrɛ la. nka ni ji nɛnɛ bɛ na ni a gɛlɛya ye, a ɲini ka fiɲɛ nɛnɛ cogoya ɲini jakite bɛnnen dɔ kɔrɔ ni dondaw ye ani fiɲɛ sumalen bɛ bɔ kɔfɛ.
Komin masina gɛlɛya bɛ dan kɔfɛla dondaw dɔrɔn ma a ka ɲi ka kɔfɛladon dondaw ka mikro-yɔrɔw kalan ani ka tigɛ-tigɛ fitinin dɔn min ka kan ka kɛ walasa ka mikro-sɛnɛfɛn ɲumanw dɔrɔn de don ka don baara la. walasa ka dies 300mm janya sɔrɔ a dɔgɔyalenba la, a dɔgɔyalenba la {{5}MM ye wajibi ye. ye.
Waati jan kɔnɔ, dagaw janya ka kan ka bonya ni 30 – 35mm ye ni kɔfɛla dakun kuraw dilanni ye. O bɛna kɛ sababu ye hali tigɛ-tigɛba min ka bon k’a sɔrɔ a ma dankari donw hakɛ la minnu tigɛra ka bɔ daga kelen-kelen bɛɛ la.
Fɛn min ka ɲi kosɛbɛ, o ye ka nin die ninnu labɛn kokura walasa ka 600 mm janya daga ta min na nafa bɛ bonya hali ni 50mm tigɛlen don kɔfɛ laban na.
Insulation:
Die surun caman bɛ baara kɛ ni fɛn jalenw ye ID kɔnɔ minnu bɛ baara kɛ i n’a fɔ insulasi ani farankan. insulasi fɛn ɲiginnenw bɛ yen minnu ka fisa, minnu bɛna lakana ɲuman di nɛnɛ ma.
A ka ɲi fana ka ɲɛfɛ ani, ni a bɛ se ka kɛ, dies kɔfɛ flosɛw ye.
Die ka ID surface man kan ka kɛ 300c jukɔrɔ waati o waati nafa sɔrɔli waati. contact pyrometer ka kan ka kɛ bolo la die kelen-kelen bɛɛ la walasa ka nin lajɛ.
Baara kelen-kelen bɛɛ daminɛ na ani lafiɲɛbɔ kelen-kelen bɛɛ kɔfɛ, daga 1 walima ka tɛmɛ o kan, olu ka kan ka bɔn i n’a fɔ a mago bɛ cogo min na walasa ka a dɔn ko die funteni hakɛ bɛ sanfɛ 300c.
Ni sɛnɛfɛnw bɔli bɛ sen na, DIE ka funteni bɛna bonya dɔɔnin dɔɔnin ani ka sabati 450 – 500 C{. nin ye funteni ɲuman ye dies surunw na minnu bɛ nɛnɛ u yɛrɛ la.
Sɛbɛnniw:
A nafa ka bon ka paramɛtiriw bɛɛ kɔlɔsi ka taa a fɛ ani ka sɛbɛnw mara minnu bɛnnen don ani minnu bɛ tiɲɛ..
Yiriwali dakunw na a ye hakilitigiya ye fana ka karɔbɔni ni siliyɔmu sɛbɛnw mara ladle kelen-kelen bɛɛ kama ani ka SIC farali porogaramu labɛn o la ka bɔ.
Microstructure control ka kan ka kɛ tuma caman na/waajibiyalen don nafama donta laban na min tigɛra ka bɔ daga kɔfɛla la, fo ka se paramɛtɛrɛw ma minnu bɛ kɛ ka ɲɛsin casting ni cut-off ma, olu bɛ sabati kosɛbɛ.
