faranfasiyali ani fiɲɛw centrifugal casting .
Centrifugal casting bimetal composite pipe defects and control Using centrifugal casting, bɛ se ka sɔrɔ ka ɲɛ kosɛbɛ ka tɛmɛ gravité casting suman jɔcogo kan, o bɛ se ka sanu fila sɔrɔ, o bɛ nɛgɛkonji la, nɛgɛsira fila bɛ bɔ kɛnɛma ka taa kɔnɔna yɔrɔ la min bɛ tɛmɛn, tɛmɛsira yɔrɔba dɔ bɛ se ka fɛnɲɛnamafagalan fila-fila-yɔrɔ-ko coefficient cofficint combinding combined of the layer combinding the different the different the different the different the different the different the different the different the different the different the other Sumaya degunw sigicogo. Santirifugali fɛnɲɛnamafagalan ja jiralen bɛ ja 5. kɔnɔ.
1.1 Pipe blank ka centrifugal casting kɔfɛ, sumanikɛcogo ye : dakun 12 ye pipe blankɔ 6 dakun fila bɛɛ la, tigɛyɔrɔ kelen-kelen bɛɛ cɛmancɛ bɛ suman siɲɛ fila sira jɔlen kan, ani ka dakun kelen-kelen bɛɛ ka eliptiki jate 6 jira dakun 12 la, 12 dakunw na, a bɛ se ka kɛ ko 12 ye 12 ye. Ellipticity maximum bɛ se 12mm ma, dakun kelen-kelen bɛɛ ellipticity error ka bon, o la, a kɔnɔna janya ka bon kosɛbɛ.1.2 cracking defects of the billet base after centrifugal casting, radial cracks bɛ teli ka kɛ bilet basi basigilen na. faraw bɛ janya ka bɔ basigiyɔrɔ la ka taa a bila a dan na ka se a dan na, ka se a dan na, a bɛ se ka kɛ ko a bɛ se ka kɛ a da la.
3 centrifugal casting defect control 3.1 centrifugal casting defect control centrifugal casting too speed too will bɛna kɛ i n’a fɔ nɛgɛ jilama sanjiko, o fana bɛna kɛ sababu ye ka pipe dɔgɔya, ka lafiya, ka slag, pipe billet kɔnɔna yɔrɔ nafama ɲɔgɔn tɛ Teliya ka bon kojugu, tubabukan ka teli ka kari, ka danfara ani ka fiɲɛ wɛrɛw tiɲɛ, wa nɛgɛ fila-fila-yɔrɔ-yɔrɔ janya bɛnbali fana bɛ sɔrɔ teliyaba fɛ, o la, pipe janya kunbɛnni ni pipe basigilen ka kari tiɲɛni bɛ sinsin kosɛbɛ a kɔrɔsili teliya kan{. Tubabu-balan-basi-base ni a ka kari-dafabaliya bɛ sɔrɔ fɛn wɛrɛw la minnu bɛ sɔrɔ so kɔnɔ, k’a sɔrɔ fɛn wɛrɛw bɛ se ka kɛ fɛn wɛrɛw ye. Formula formula de centrifugal casting:
n 299 G R
yɔrɔ min na r ye casting kɔnɔna radius ye, CM; G ye girinya hakɛ ye; n ye teliya santirifugali ye, r / min{0}} nɛgɛdaga girinya hakɛ ye 40~76 ye, bimetal composite pipe kɔnɔna janya ye 146mm ye, ani centrifugal casting teliya jatebɔ ye 699 ~ 964 r/min{{. ye o la, centrifugal stepe bɛ latilen ka kɛɲɛ ni testing situation ye. Teliya bɛ Kɔrɔsi 950 ni 1050 r / min cɛ, pipe girinya tɛ kelen ye kosɛbɛ, o bɛ Dɔgɔya kosɛbɛ, wa a karifa tiɲɛniw basigilen bɛ Bɔ.
The centrifugal casting has many same defects as static casting, but there is less tendency to form defects in centrifugal casting. The common defects in casting production include stoma (pinhole), crack (tear), lap, shrinkage hole, etc., and ribbon bedding and rain defects are unique to centrifugal casting. The production of thick-wall steel pipe in Centrifugal casting ye gɛlɛya ye kosɛbɛ, bawo nɛgɛdaga min bɛ kɛ ni kogo ye, o ka nɔgɔn ka fara kari funteni kan, danfara min tɛ kɛ tuma bɛɛ, lap ani fiɲɛ wɛrɛw, ani nɛgɛ pipe walima nɛgɛdaga min bɛ kɛ ni nɛgɛ ye, o ka nɔgɔn ka lap ni crack defects sɔrɔ{. centrifugal casting la, copper alloy solidification mode ye paste solidification ye a ka c’a la, a bɛ kɛ ni copper alloy casting ye. Ɲɛji, ani fɛn min bɛ bɔ, o bɛ se ka kɛ ko fiɲɛ tɛ a la.2 fiɲɛba minnu bɛ sɔrɔ centrifugal casting production 2.1 layered defects centrifugal casting layered defects la, olu fana bɛ dɔn ko band bedding defects, o ɲɔgɔnna defits bɛ bɔ centrifugal casting dɔrɔn de la, casting wall thickness is more than 80 ribbon ribbon ribbon ribbon ribbon, while thin-wall ribbon ribbon A bɛ fara ɲɔgɔn kan ni fɛnɲɛnamafagalan dɔgɔmanw ye (Common crystal phase ani oxide walima sulfide clamp, debris, ribbon outside the edge contrast contrast line, fanba bɛ kɛ centrifugal casting la, alloy bɛna nɔ bila rubbon bedding defects la, a ka bon ni alloy solidification range ye, ka caya, nin ko in bɛ jɛɲɔgɔnya belebele sɔrɔ ni centrifuge tempate thant{{{13 ye walima ka ban ni jiginni teliya ladilanni ye, ka teliya bɔn ani ka nɛgɛ ni modɛli funteni hakɛ ladilan. ɲɛfɔli caman bɛ yen minnu bɛ kɛ ni ribɔn ɲɔgɔnna dilan nafamafɛnw ye. hakilina dɔ ye ko a bɛ se ka kɛ ko a bɛ se ka kɛ ko a girinya yeli bɛ kɛ ka bɔnɔgɔla sanfɛla ni a duguma, ani ko nɛgɛ jimafɛnw danfara bɛ kɛ ni fɛn wɛrɛ ye min bɛ kɛ ni fɛn wɛrɛ ye{19 waati la. Liquide (jilama) min bɛ wuli ka wuli, nɛgɛ jilama bolicogo tɛ kɛ cogo la min bɛ kɛ ka da yɛrɛyɛrɛ kan, ni nɛgɛ jilama bɛ don bɔgɔdaga kɔnɔ, tubulu daga jɔli bɛ kɛ cogo dɔ la, ni nɛgɛ jilama tɔ sera yɔrɔ kɛrɛnkɛrɛnnen na kɔfɛ kojugu, nɛgɛ jilama fɔlɔ sera a bɛɛ ma walima a yɔrɔ dɔ la, nin ko in bɛna kɛ sababu ye ka lap, nɛnɛ walima layɛrɛli jɛlen sɔrɔ, a bɛ fɔ a ma ko a bɛ se ka wuli ka bɔ a nɔ na, a bɛ fɔ a ma ko a bɛ se ka kɛ. Santirifuge horizontale, ni cast bɛ wuli teliya la kojugu walima nɛgɛ bɛ woyo ka don cast la teliya la, sanjiko bɛna kɛ, sanjiko bɛ se ka ɲɛfɔ iko nɛgɛ wulilen ka bɔ ka bɔ ka bɔn sanfɛ ka taa duguma sanji cogo la, shshown in figure 1 is a schematic ja of rain fenomenon, this phenomenon of the molten of molten of the molten of molten of the molten of the molten of the molten of the molten of the molten of the Molten O bɔgɔdaga wulilen, ni nɛgɛ jilama min bɛ wuli, o tɛ teliya ka se a ka fɛnw jiginni teliya ma, nɛgɛ kogo wulilen ka sɔgɔli hakɛ dɔgɔyalen, nɛgɛ wulilen tɛ se wuli teliya ma min ka bon walasa ka se sɔrɔ girinya kan, sanjiko ko bɛ sɔrɔ yɔrɔ la. kun wɛrɛ min bɛ se ka kɛ fɛnɲɛnamafagalan ye, o tɛ se ka kɛ fɛnɲɛnamafagalan ye, ni o ye funteni ye min bɛ se ka kɛ fɛn ye min bɛ se ka kɛ fɛn ye min bɛ se ka kɛ fɛn ye. Sanfɛ, viscosité bɛ dɔgɔya, for holten sanu, ji min bɛ baara kɛ ni teliyaba ye walasa ka se sɔrɔ girinya nɔ kan, o bɛna gɛlɛya kosɛbɛ, se, ni jigin teliya dɔgɔyali, kɛrɛnkɛrɛnnenya la ni a ye nɛgɛ tilancɛ teliya jigin teliya la ka se furakɛli ma. Kun wɛrɛ min bɛ sanjiko la, o ye ko casting coating bɛ nɔgɔya kojugu. nin ko in na, a ka gɛlɛn ka se ka to senna ka tɛmɛ a kan. Casting. O ko in bɛ se ka dɔ fara casting jiginni teliya kan, o la, a bɛ dɔ fara nɛgɛji ni sɔgɔli cɛ ɲɔgɔnkanu kan.
2.3 shrink hole and cold separation Ni nɛgɛji wulilen don teliya la ka kɛ fɛn ye, a bɛna sumaya kojugu bɔ cast kɔnɔ. ni i ye a suma ni solidification ye cast kɔkan, cast core solidifikasiyɔn bɛ teliya, ani nɛgɛ sanfɛla funteni fana bɛ cogoyaw di shrink hole formation ma{3} la ni nɛgɛ jilama bɛ bɔ dɔɔnin dɔɔnin, o bɛ kɛ sababu ye ka cast wall kɛ ka a kɛ cast ye, ka kɛ sababu ye ka cast kɛ ka cast kɛ ka a kɛ cast ye, ka a kɛ ni cast wall ye min bɛ kɛ ka fɛnw kɛ ka a kɛ ka a kɛ ka a kɛ ni shrink hole ye. Ka taa ɲɛ yɔrɔ bɛɛ la, ani ka dɔgɔya dingɛ min bɛ koori kɛrɛfɛ, o bɛna se hakɛ fitinin dɔ ma{4}} nɛnɛ danfara bɛ wele fana ko lap, o bɛ sɔrɔ jibɔcogo bɛnbali kɛli fɛ, i n’a fɔ jibɔ teliyabali, pikiri teliya, o la, a bɔli teliya ka kan k’a lajɛ kosɛbɛ ko nɛgɛ ji bɛ to ka don bɔgɔdaga bɛɛ kɔnɔ ani o kɔfɛ ka se ka bɔnɔgɔla laban na{5} ni ceping speed ye, o bɛna kɛ sababu ye ka cepɛrɛn laban sɔrɔ. Nɛnɛ farali ko fana bɛna bɔ kɛnɛ kan.
2.4 Degregation and Crack in centrifugal casting, the thick section casting bɛ se ka danfara sɔrɔ. casting kɔnɔ, ka da centrifuge jiginni kan, nɛgɛ jilama yɔrɔ o yɔrɔ la, o bɛna danfara bɔ casting of the composition. nafa minnu bɛ sɔrɔ gati la, olu dɔ ye ko u bɛ se ka sɔrɔ ka caya, nka u bɛ se ka sɔrɔ ka caya ni o ye ko u bɛ se ka sɔrɔ ani u bɛ se ka sɔrɔ ka caya ni gati ye, nka u bɛ se ka o fɛn sɔrɔ ka caya ni o ye fɛn ye min bɛ se ka kɛ fɛn ye. Ni nɛnɛ bɛ teliya kojugu, nɔgɔw ni gazi bɛna bin casting kɔnɔ. ni fɛnɲɛnamafagalan ji bɛ ni fosiforo ni kisɛ hakɛ ye min ka bon kosɛbɛ, nin ko in bɛna ye ka ɲɛ. danfara sababuba minnu tɛ se ka kunbɛn santirifuge sitɛmu balanbali la Sanjiko min bɛ kɛ nɛgɛji wulilen na min bɛ sɔrɔ jiginni dɔɔni fɛ; Fɔɔnɔ hakɛ caya kojugu; ani Slow Solidification Speed.Crack defects bɛ kɛ cogo kɛrɛnkɛrɛnnen na centrifugal casting la, ani static casting la, o fɛɛrɛ kelenw bɛ se ka kɛ centrifugal casting la.
2.5 Needle orifice stoma (Soma, Eye) in centrifugal casting, stomatal defects fana ka ca kosɛbɛ, ni gazi jilama caman bɛ sɔrɔ a la, ji bɛ sɔrɔ farikolo walima fɛnɲɛnamafagalan na, walima ni penisilini sugandili ma bɛn, pikirijikɛlan walima ɲɛnayeli bɛ kɛ. casting kɔnɔ, bawo nɛgɛdaga tɛ se ka boli, ani nɛgɛdaga tɛ se ka kɛ fɛn ye min bɛ kɛ ka fɛnw sɔgɔ. Nɛgɛ jilama teliyalen don kosɛbɛ, o la pinhole bɛ dilan kogo finmanw filili la. pinhole stoma defects bɛ se ka bali ni nin fɛɛrɛ ninnu ye: Aw bɛ nɛgɛdaga kɛ nɛgɛdaga nɔ na, suguya Premote de prémouvre de la casting; Aw kana baara kɛ ni finimugu ye min kɔnɔ ji kristalɛ bɛ sɔrɔ; Aw kana baara kɛ ni funteni hakɛ caman ye. ni aw bɛ penisilini kɛ, ni bɛntonite ma ɲagami kosɛbɛ ji la, ji kristalɛ bɛ se ka kɛ bɛntoni jalen na, ani nɛgɛ jilama min bɛ wuli, o funteni bɛ kɛ sababu ye ka ji kristalɛ kɛ ka wuli, ani ni stomatali fiɲɛw bɛna nɔgɔya ka bɔ. ni a bɛ kɛ ko a bɛ kɛ ka a ka fɛn tigɛ, o ye gazi ye min bɛ kɛ ka a sɔgɔ, ani min bɛ kɛ ni nɛgɛ ye min bɛ kɛ ka fɛnw sɔgɔ, ani min bɛ kɛ ni nɛgɛ ye min bɛ kɛ ni nɛgɛ ye, ani ni nɛgɛ ye min bɛ kɛ ka fɛnw sɔgɔ, ani ni a bɛ se ka kɛ ni fɛn ye min bɛ kɛ ka fɛnw sɔgɔ, ani ni a bɛ kɛ ni fɛn ye min bɛ kɛ ka fɛnw sɔgɔ, ani ni a bɛ kɛ ni fɛn ye min bɛ kɛ ka fɛnw sɔgɔ, ani ni a bɛ kɛ ni fɛn ye min bɛ kɛ ka fɛnw sɔgɔ, ani ni a bɛ kɛ ni fɛn ye min bɛ kɛ ka fɛnw sɔgɔ, ani ni a bɛ se ka kɛ ni fɛn ye min bɛ kɛ ka fɛnw sɔgɔ, ani ni a bɛ kɛ ni fɛn ye min bɛ kɛ ni fɛn ye min bɛ kɛ ka fɛnw sɔgɔ. A bɛ se ka kɛ sababu ye ka stomatal defects bɔ. nɛgɛw ni nɛgɛw la, pinhole-like pores bɛ ye ka bɔ cast kɔkan i n’a fɔ yɔrɔ jɛlenw ni yɔrɔ jɛlenw, i n’a fɔ canding dingɛw bɛ kɛ cast kɔnɔ, ani pores cɛmancɛ ka dɔgɔ kosɛbɛ. nɛgɛ jilama melting kɔnɔ, o fana bɛna kɛ sababu ye ka gazi dissolution sɔrɔ, through the hydrogène, through hydrogène, et{10}, etc{10, etc{10, etc{10}, etc{10}, etc{10}, etc{10}, etc{10}, etc{10}, etc{10}. ani fɛnɲɛnamafagalanw jalen, o bɛ se ka gazi doncogo dɔgɔya kosɛbɛ, a bɛ se ka tobilikɛcogo fana kɛ ka gazi bɔ.
2.6 Internal loosening and central slag defects To ensure the density of the casting tissue, the casting must achieve sequential solidification from the outside to the inside surface. In this way, the solidification and contraction of each layer requires compensation by the inner layer of liquid metal liquid. If the metal is poured quickly, considerable cooling occurs on the inner surface, and loosening occurs inside the casting, which is caused by solidification occurring from Kɔnɔna ni kɛnɛma fan fila bɛɛ. cɛncɛn filili kama, nɛnɛ teliya min bɛ bɔ kɛnɛma, o bɛ dɔgɔya kosɛbɛ, a bɛ nɛnɛ ka bɔ kɔnɔna na ani ka bɔ kɛnɛma yɔrɔ la, o la, dɔgɔyali bɛ kɛ solide ɲɛfɛ yɔrɔ la, walasa ka o fiɲɛw bali, kɔnɔna funteni ka kan ka to sanfɛ walasa ka sira solideli kɛ, ni a kɔnɔna jalen tɛ, molten imporing liquid, molten impiring, molten hying, molten imporing liquid, molten hypore, molten hying, molten hying, molten hying, molten hying herde Slag.
