Induction inonyunguduka vira kunyungudutswa kwesirivha neakasanganiswa ayo

Hunhu hwesirivheri uye alloys ayo

Sirivha isimbi yakakosha iine 960.8Y kunyungudika uye density ye10.49g/cm3. Haina oxidize pakupisa kwekamuri. Sirivha yakachena ichena chena. Inogona kuumba alloy nechero chikamu chegoridhe kana mhangura. Kana iyo alloy ine goridhe kana mhangura zviyero Sezvo ichiwedzera, ruvara runoshanduka yero. Kana sirivha iri eutectic nealuminium uye zinc, zvakare iri nyore kuita alloy. Pakati pesimbi dzese, sirivha ine yakanakisa conductivity.

Kana sirivha yakanyungudutswa muchoto chesimbi yakawanda, inozowedzera oxidize uye inoshanduka. Asi kana paine simbi yakapwanyika (splashed metal inoreva simbi dzepasi-mutengo dzinogara pamwe uye dziripo setsvina muore, simbisa uye zvepakati zvigadzirwa zvemetallurgical zvirimwa zvegoridhe, sirivha uye tong boka simbi, kunyanya kusanganisira mhangura, lead, zingi. Silver oxide inokurumidza kuderedzwa. Pasi peyakajairika kunyunguduka (tembiricha yevira 1100-1300 ^), kuparara kwesirivheri kunenge 1% kana zvishoma, asi kana oxidation yakasimba, hapana chivharo chekuvhara pasirivheri yakanyungudutswa, uye kubhadharisa. ine zvakawanda zvinotungamirira, zingi, zviyeuchidzo, zvisungo, nezvimwewo. Kana simbi yakasvibiswa, kurasikirwa kwesirivha kuchawedzera.

Kana sirivheri yanyunguduka mumhepo, inogona kutora kanenge ka21 huwandu hwayo hweokisijeni, iyo inoburitswa kana sirivha yakanyungudutswa kuita nyika inofashaira, inowanzozivikanwa se “silver rain”, izvo zvinokonzeresa kurasika kwebhero dzesirivheri dzakanaka. .

Silver casting process

Nhanho yekupedzisira yekucheneswa kwesirivheri nekunatswa ndeyekunyungudutsa iyo yakakwirira-yakachena sirivha poda kana sirivheri ndiro yakacheneswa ne electrolytic kana kemikari nzira, uye wozokandwa mumaingo kana mapellets anosangana nezviyero zvenyika kana zvimwe zvakatemwa.

Iyo induction yekunyungudutsa choto inoshandiswa pakukandira kwakanaka kwegoridhe nesirivha. Kugona kunogona kusarudzwa maererano nemazuva ese ekugadzirisa simba regoridhe nesirivha, kazhinji anenge 50 ~ 200kg. Kana paine zvakakosha zvinodiwa, hombe induction yakanyunguduka choto inogona zvakare kushandiswa kunyungudika induction. Pfungwa huru dzekushanda kwehunyanzvi hwechoto chekunyungudutsa sirivheri ndizvo zvinotevera.

AWedzera huwandu hwakakodzera hwekuyerera uye oxidant

Kazhinji, saltpeter uye sodium carbonate kana saltpeter uye borax inowedzerwa. Huwandu hwekuyerera uye oxidant yakawedzerwa inosiyana nekuchena kwesimbi. Zvakadai sekunyungudutsa electrolytic sirivheri poda ine zvinopfuura 99.88% sirivheri, kazhinji inongowedzera 0.1% -0.3% sodium carbonate kuti oxidize tsvina uye dilute slag; uchinyungudutsa sirivha netsvina yakakwira, unogona kuwedzera huwandu hwakakodzera hwesaltpeter uye borax kusimbisa Oxidize chikamu chetsvina kuita slagging uye kubvisa. Panguva imwecheteyo, huwandu hwe sodium carbonate hunofanira kuwedzerwa zvakakodzera. Huwandu hweoxidant haufanirwe kunge hwakawandisa, zvikasadaro iyo crucible ichave yakasimba oxidized uye kukuvara.

Mushure mekunyunguduka kweiyo oxidation uye slagging, giredhi resirivheri yeingot yakakandwa yakakwira kupfuura iyo yesirivheri yakabikwa, saka zvinodikanwa kuwedzera huwandu hwakakodzera hwekudzivirira flux uye oxidant.

B Simbisa kudzivirira uye deoxidation yesirivha

Kana sirivha yakanyunguduka mumhepo, inogona kunyungudutsa huwandu hwakawanda hwegasi, iyo inoburitswa kana yakanyungudutswa, izvo zvinounza kuomerwa mukushanda kwekugadzira uye kukonzeresa kurasikirwa kwesimbi.

Kana sirivha yanyunguduka mumhepo, inogona kunyungudika kanokwana ka21 kuwanda kweokisijeni. Okisijeni iyi inoburitswa kana simbi ichitonhora, ichigadzira “mvura yesirivha”, ichikonzera kurasikirwa kwesirivha yakatsetseka. Kana iyo okisijeni yanonoka kuburitsa, zvirema zvakaita semaburi ekuderera, pores, uye makomba anoumbwa muingot yesirivha.

Mukushanda chaiko, kana tembiricha yesirivheri yakanyungudutswa ichiwedzera, kunyungudika kweokisijeni musirivheri kunoderera. Kuti uderedze kuoma kwekukanda, tembiricha yemvura yesirivheri inofanira kuwedzerwa isati yakanda, uye dhizaini yekudzikisa (yakadai semarasha, madota emiti, nezvimwewo) inofanira kuvharwa pamusoro pemvura yesirivha kuti ibvise. oksijeni. Panewo chidimbu chehuni yepine yakawedzerwa kune mutero, iyo inonyanya kupiswa nekunyunguduka kwesirivha kubvisa chikamu cheokisijeni. Kune zvakare kushandiswa kwematanda ematanda kubvongodza mvura yakanyunguduka isati yakandwa kuti izadzise chinangwa chekubvisa oxygenation.

C inyanzvi yekudurura tembiricha

Kana simbi yesirivha yakakandwa, kuwedzera kwekushisa kwesimbi kunobatsira kuderedza kuwanda kwegesi yakanyungudutswa, uye simbi inopisa inodururwa muforomu, uye chiyero chekugadzirisa chinononoka, chinobatsira pakusunungurwa kwegesi uye kuderedza kukanganisa kwe ingot. Kazhinji kupisa kwekukanda kwesirivheri kunofanira kuva 1100-1200T; o

D mold wall inofanira kushandisa pendi, kudira kushanda kunofanira kuva kunonzwisisika

Kana iyo ingot yesirivha yakakandwa, shandisa ethane kana petroleum (mafuta anorema kana dhiziri) murazvo kuti upfungaire hutsi hutete hwakafanana pamadziro emukati me mold, uye kushandiswa kwekushandisa kwakanaka.

Mukuwedzera, hutano hwekukanda hune zvakawanda zvekuita nehutano hwe ingot. Kune vertical mold casting, kuyerera kwemvura kunofanira kugadzikana, kuyerera kunofanira kunge kuri pakati, uye zvinhu zvacho hazvifanirwe kupararira uye madziro emukati haafanire kushambidzwa. Tanga kudonha, uye wobva wawedzera nekukurumidza kuyerera kwemvura kusvika iyo simbi yepasi yazadzwa neanenge matatu-mashanu ehurefu hwe mold, uye zvishoma nezvishoma dzikamisa kutendera gasi kuti riburitswe zvizere. Paunenge uchidira kugedhi, teerera pakuzadza kuyerera kusvikira mhinduro isati yapombwa mukati. Kune yakavhurika yakakosha flat mold, iko kushanda kuri nyore, chero bedzi mold yakaiswa panzvimbo yakachinjika, mupumburu wepasi uri perpendicular. kusvika kune yakareba axis ye mold, uye simbi yakanyungudutswa inodururwa zvakaenzana mukati mepakati pekugadzira. Kuti uchengetedze madziro emukati memuumbi, nzvimbo inodirwa simbi yakanyungudutswa inofanira kugara ichichinjwa panguva yekukanda kudzivirira pakati peforoma kuti isaita ngura mugomba.