1, Kuchena uye kunaka kwehukama
Kuchena kunoreva nhamba, chimiro uye kugoverwa kweasina-metallic inclusions musimbi.Kuenzaniswa nekukandwa kufa,inoenderera mberi ichikanda muchinaprocess links, nguva yekudurura yakareba, saka iyo inclusions yemhando dzakasiyana-siyana dzezvinyorwa, kuumbwa kunowedzerawo kuoma;inclusions kubva kune crystallizer liquid phase cavity inoyangarara zvakanyanya kuoma, kunyanya iyo yakakwirira yekudhirowa kumhanya kwediki billet inclusions zvakanyanya kuoma kusabvisa.Kuvapo kweinclusions kunoparadza kuenderera uye denseness yesimbi matrix.Yakakura kupfuura 50μm yakakura inclusions inowanzoperekedzwa nekutsemuka, zvichiita kuti nguva yakaderera chimiro chekuramba chichikanda billet chakakundikana, ndiro delamination, uye kukuvadza pamusoro pesimbi inotonhora yakakungurutswa, nezvimwewo, simbi inokuvadza zvikuru.Ukuru, maumbirwo uye kuparadzirwa kweinclusions pahutano hwesimbi yakasiyanawo, kana iyo inclusions iri duku, spherical, diffus distribution, kukanganisa kwehutano hwesimbi pane kusungirirwa kwekuvapo kwezvishoma;apo iyo inclusions yakakura, inongoitika kugovera, kunyangwe iyo nhamba yediki asi zvakare inokuvadza kune chigadzirwa chemhando.
Semuyenzaniso: kubva yakadzika-inodhonzwa simbi ndiro punching mutswe zvimedu inspection vakawana kuti makatsemuka aripo pa 100 ~ 300μm irregular CaO-Al2O3 uye Al2O3 heterometallic guru inclusions.
Semuenzaniso, nekuda kwekuvapo kweAl2O3 inclusions pasi peganda reinoramba richikanda billet, yakakungurutswa mukati mepepa remotokari rine hurema hwemutsara wakasviba, zvichiita kuti pave nekushata kwepamusoro pepepa.
Kune zvakare anoshandiswa kurongedza tin-plated ndiro, mukuwedzera kune izvo zvinodikanwa zvemhando yepamusoro inotonhora yekugadzira kuita, saizi uye nhamba yeinclusions inewo zvinoenderana nezvinodiwa.Pahukobvu hwe0.3mm simbi yakatetepa ndiro, munzvimbo ye1m2, saizi isingasviki 50μm inclusions inofanira kunge iri pasi pe5, kuitira kuti uwane chiyero chezvikara che 0.05% kana pasi, ndiko kuti, kudzika kwakadzika 2000 DI cans, flat isingasviki 1 zvimedu.Saka ona kuti zvakakosha sei kuderedza kuwanda kwekuiswa mukatikuenderera mberi kukanda mabhirijikuvandudza kunaka kwesimbi yakadzika-yakadhonzwa.
Kune waya yakanaka kwazvo yesimbi (yakadai se 0.01 ~ 0.25mm dhayamita tireyi waya yesimbi) uye yakaonda kwazvo simbi ndiro (senge ukobvu hwe 0.025mm tin-plated ndiro), saizi yezvinosanganisirwa zvirimo inotonyanya kuomarara zvinodiwa.
Mukuwedzera, ukuru uye nhamba yekubatanidzwa pahutano hwesimbi uye kukanganisa kweiyo chaiyo nzvimbo yekanda billet.General slab uye billet unit kureba kwenzvimbo (S) uye vhoriyamu (V) reshiyo mu 0.2 ~ 0.8.Nekuvandudzwa kwendiro yakatetepa uye yakatetepa tekinoroji tekinoroji, S / V kusvika ku10 ~ 50, kana iyo yakafanana inclusions musimbi, nhete yendiro uye nhete strip simbi, zvinoreva kuti inclusions padyo nepamusoro peiyo cast billet, iyo yakakura kukanganisa pakugadzirwa kwemhando yeplate yakatetepa.Saka kuderedza inclusions musimbi inonyanya kukosha.
2, Kuvandudza kuchena kwematanho
Kuvandudza kuchena kwesimbi kunofanira kunge kuri musimbi mune crystallizer pamberi, kubva pakugadzirisa kuderedza kusvibiswa kwesimbi, uye kuwedzera kubatanidzwa kubva musimbi isina kubatanidzwa.Kuti izvi zviitike, matanho anotevera anofanira kutorwa.
a, Hapana slag kunze kwesimbi: inoshandura inofanira kuvhara slag kunze kwesimbi, choto chemagetsi uchishandisa eccentric furnace pasi kunze kwesimbi, kudzivirira slag muhari yesimbi kana bhakiti resimbi, tangi.
b, Maererano nezvinodiwa zvegiredhi resimbi kuti usarudze kurapwa kwakakodzera kwesimbi yakachena, kuvandudza morphology yeinclusions.
C. Adopt oxidation-isina kudira tekinoroji.Mushure mekunatsa kurapwa, iyo okisijeni yemukati yesimbi yakanyungudutswa yakaderedzwa kusvika pasi pe20 × 10-6;mune simbi ladle → yepakati tangi → crystallizer inoshandiswa kudzivirira kudira;tangi yepakati uchishandisa yakapetwa kaviri ye slag inovhara agent, simbi inoparadzaniswa kubva kumhepo kudzivirira yechipiri oxidation yesimbi yakanyungudutswa.
d.Ipa kutamba kwakazara kune chinzvimbo chepakati tangi metallurgical purifier.Iko kushandiswa kwekuvhuvhuta Ar inomutsa, kunatsiridza kuyerera kwesimbi, kubvisa nzvimbo yakafa yetangi repakati;wedzera kugona kwetangi repakati uye kudzika kudzika kwedziva rakanyunguduka, wedzera nguva yekugara kwesimbi yakanyungudutswa mutangi repakati, kusimudzira kuyerera kwezvinosanganisirwa, uye wedzera kuchenesa simbi yakanyungudutswa.
f, Inoenderera mberi yekukanda muchina sisitimu inoshandisa yakakwirira refractoriness, kunyunguduka kurasikirwa kudiki, emhando yepamusoro refractory zvinhu kuderedza inclusions musimbi.
g, Ipa kutamba kwakazara kune basa recrystallizer yakanyungudutswa simbi yekuchenesa uye billet pamusoro pemhando controller.Iyo yakasarudzwa yekunyudza spout inofanirwa kuve neyakavhurika chimiro uye kona, kudzora mafambiro ejekiseni rwizi, kusimudzira kupatsanurwa kweinclusions inoyangarara;uye inowedzerwa nekuita kwakanaka kwechidziviriro slag, inotora yakanyungudika inoyangarara inclusions yakacheneswa simbi yakanyungudutswa.Uye zvakare, iyo crystallizer inogona zvakare kupihwa mukati meiyo cored alloy waya kuti iwane micro-alloying mucrystallizer, iyo isingangonatsiridza kunyudzwa kweiyo alloy, uye inogona kunyatso kudzora kuumbwa kwesimbi yakanyungudutswa, gadzirisa iyo solidification chimiro, kuvandudza morphology ye inclusions, iyo inobatsira pakuvandudza nekuchenesa kunaka kwesimbi.
h.Electromagnetic inosimudzira tekinoroji inoshandiswa kudzora kufamba kwejekiseni rwizi.Masvomhu anotaridza kuti mune yakamira mamiriro, makuru kupfuura 1mm slag zvimedu zvinoyangarara zvinomhanya zvingangoita 100 ~ 200cm / s;uye jekiseni rinoyerera richidzika kuyerera kumhanya kwe60 ~ 10cm / s;inooneka crystallizer fluid chikamu mhango mukati mejekiseni inoyerera inoyerera tambo inokanganisa nzvimbo inclusions inoyangarara yakaoma;mamwe inclusions anogona kunge akabatwa nekusimbiswa kwe dendrite.
Muchokwadi, mune yakakandwa billet pamusoro pazasi 10 ~ 20cm kazhinji yakakwirira inclusions.Kuiswa kwemabhureki emagetsi kunogona kutadzisa kufamba kwejekiseni kuyerera, kusimudzira kuyerera kwemainclusions uye kunatsiridza kuchena kwesimbi.
Nguva yekutumira: Zvita-23-2022