Ithonya Le-Metal oxide Film Kuzinga Le-Aluminium Alloy Castings

"Ukulingisa" inqubo yokwakha insimbi engamanzi. Kuyaziwa ukuthi insimbi ewuketshezi ekushiseni okuphezulu izokwakhiwa nge-oxidized ebusweni emkhathini futhi ikhiqize ifilimu ye-oxide.

Kodwa-ke, isikhathi eside, umthelela wale filimu ye-oxide kwikhwalithi ye-aluminium alloy castings ngokuyisisekelo ibheke kuphela inkinga yokufakwa okungeyona eyensimbi ensimbi encibilikisiwe, futhi akukho ngxoxo eqhubekayo eyenziwe.

UJ. Campbell wase-University of Birmingham, e-UK, ngokususelwa eminyakeni yocwaningo, uthole ukuthi ama-bi-films ahlanganisiwe anomthelela obaluleke kakhulu kwikhwalithi ye-aluminium alloy castings evela ezintweni ezinkulu nezincane. UCampbell et al. bakholelwa ukuthi ukuqonda kwama-bi-films ukutholakala okuthokozisa kakhulu. Njengamanje, sibheka okwesikhashana iziphetho nokuqonda okutholwe nguCampbell nabanye "njengethiyori yamafilimu amabili".

 Ngemuva kokufakwa kwefilimu ye-oxide okubandakanyeka ku-liquid aluminium alloy, ithonya lalo kwikhwalithi yokusakaza ingahlukaniswa cishe ngezici ezimbili:

Esinye isici se-macroscopic. Ngaphezu kokusika i-matrix yensimbi ukunciphisa izakhiwo zomshini, ibuye ibangele ukukhubazeka kokuphonsa okufana ne-porosity nokuncipha okuncane;

Esinye isici esincanyana, esinomthelela obalulekile kusayizi wokusanhlamvu, ibanga eliphakathi kwama-dendrites, nomphumela wokuguqulwa kukaNa noSr ku-aluminium-silicon alloy.

1. Izici zefilimu ye-oxide ebusweni bensimbi engamanzi

Ukuhlaziya izici zefilimu ye-oxide, ukuminyana kanye nephuzu lokuncibilika kuketshezi lomama wensimbi okunamathiselwe kulo ngeke kubhekwe ngasikhathi sinye. Ngokuya ngensimbi nensimbi, thatha ukukhiqizwa kwezinsimbi zensimbi njengesibonelo. I-FeO ekhiqizwa i-oxidation yensimbi encibilikisiwe inendawo yokuncibilika futhi inesisindo esiphansi kakhulu kunaleso sensimbi encibilikisiwe, futhi isebenza kakhulu emazingeni okushisa aphezulu, futhi empeleni akunakwenzeka ukuba khona wedwa. I-FeO ingahlangana ne-SiO2 ukwakha iphuzu lokuncibilika eliphansi i-FeO.SiO2, engaphendula nge-silicon nama-manganese ngensimbi ukwakha i-MnO ne-SiO2 bese ihlangana yakha i-MnO.SiO2. Ingasabela futhi ngekhabhoni ngensimbi ukwakha i-CO, futhi kuzoba nengxenye encane yayo. Iyoncibilika ngensimbi encibilikisiwe. Uma ukwelashwa kwe-deoxidation kungalungile, noma insimbi encibilikisiwe yenziwe kabili ngemuva kokuthinta, izokhulisa inani lokufakwa okungeyona insimbi ensimbi, noma ibangele ukukhubazeka okufana nama-pores noma ukufakwa kwe-slag ebusweni bokusakaza. Kodwa-ke, ama-oxide akhiqizwa ebusweni bensimbi encibilikisiwe anezindawo zokuncibilika eziphansi kunezinga lokushisa lensimbi encibilikisiwe futhi anganqwabelana kuphela. Azikwazi ukugoqwa zibe i-oxide film interlayer futhi imiswe ngensimbi encibilikisiwe, ngakho-ke ngeke zibe khona izinkinga ezibangelwa i-oxide film interlayer. .

Isimo se-aluminium alloys nama-magnesium alloys sihluke ngokuphelele. Incazelo emfushane yama-alloys e-aluminium yile elandelayo: I-Aluminium isebenza kakhulu esimweni soketshezi, futhi ingaphezulu le-aluminium encibilikisiwe lingasabela kalula nge-oxygen emoyeni ukuze yenze amafilimu e-Al2O3. Indawo yokuncibilika ye-Al2O3 iphakeme kakhulu kunaleyo ye-liquid aluminium alloy, futhi izinze kakhulu. Ubuningi be-Al2O3 buphakeme kancane kune-aluminium encibilikisiwe. Ngakho-ke, ifilimu i-Al2O3 kulula ukuyimisa kuketshezi lwe-aluminium futhi ngeke ihlanganiswe futhi yehlukaniswe noketshezi lwe-aluminium. Lapho kuphazamiseka uketshezi lwe-aluminium alloy, ifilimu ye-Al2O3 ebusweni izosonga isemishi bese idonswa ensimbi encibilikisiwe, idale izinkinga eziningi ezihlukile ze-aluminium alloy.

2. Ukwakheka kwe-oxide film interlayer nemiphumela yako eyingozi

Uketshezi lwe-aluminium alloy luzophazamiseka kakhulu ngesikhathi senqubo yokuncibilikisa, lapho kuthululwa esithandweni somlilo, ngesikhathi sokwelashwa kwe-metamorphic, lapho kufafazwa futhi kuhlanzwa ngejubane eliphezulu lomoya, nangenkathi yokuthela. Ukuphazamiseka kobuso bensimbi ewuketshezi kuzodonsa ifilimu ye-oxide ebusweni bayo, kuyenze ikhule, igoqeke, futhi iphule. Indawo engamanzi ehlanzekile ye-alloy evezwe ekunqanyulweni kwefilimu ye-oxide izofakwa i-oxidized ukukhiqiza ifilimu entsha ye-oxide. Ukugoqwa kwefilimu ye-oxide kuzokwenza ukuthi izindawo ezomile ohlangothini olubheke emkhathini zinamathelane, bese kuthi umoya omncane usongwe phakathi kwalezi zindawo ezimbili ezomile ukuze ube yi "oxide film sandwich". Isidlali sefilimu se-oxide sithinteka kalula ensimbini encibilikisiwe, futhi sizofakwa kwizigaxa ezincane ngaphansi kwesenzo sensimbi encibilikisiwe.

Ngoba iphuzu lokuncibilika kwe-Al2O3 lingaphezulu kwenkulungwane degrees celcius ngaphezu kwezinga lokushisa kwe-aluminium alloy liquid, futhi linezinga eliphakeme lokuzinza kwamakhemikhali, amaqoqo amancane ngeke axhumane futhi ngeke ancibilike ku-aluminium alloy. Yize ukuminyana kwe-Al2O3 kuphakeme kancane kunoketshezi lwe-aluminium alloy, ukuminyana kwe-oxide film interlayer esongwe emoyeni kucishe kufane naleyo ye-aluminium alloy liquid. Ngakho-ke, ngaphezu kokungenzeka kokucwila kwesidlali sefilimu se-oxide ngesikhathi sokuma isikhathi eside esithandweni esikhulu sokubamba, sizomiswa ngokuqinile kuketshezi lwe-aluminium alloy ngaphansi kwezimo zokukhiqiza ezijwayelekile. Uketshezi lwe-aluminium alloy olumise ama-interlayers wamafilimu e-oxide luzokhiqiza ama-interlayers amaningi we-oxide lapho seluphazamiseka futhi. Ngesikhathi senqubo yokukhiqizwa kokuphonswa, ukuncibilikisa kwe-alloy, ukuthululela kusuka esithandweni, ukwelashwa kokuguqulwa, ukwelashwa kokuhlanzwa, ukuthululela nokunye ukusebenza kuzodala ukuphazamiseka okuqinile kuketshezi lwe-aluminium alloy. Ngaphezu kokugcina i-oxide film interlayer yasekuqaleni, i-aluminium alloy liquid nayo izodala ukuthi Iphazamiseke futhi futhi ama-interlayers amasha we-oxide film ayengezwa ngokuqhubekayo. Ngakho-ke, insimbi encibilikisiwe engena emgodini iqukethe inani elikhulu lama-interlayers amafilimu amancane kakhulu. Ngemuva kokuthi insimbi encibilikile igcwalise umgodi, iba sesimweni sokuma, futhi i-interlayer yefilimu ye-oxide efinywe esixukwini izolula kancane kancane ibe ucezu oluncane. Ngemuva kokuthi insimbi encibilikisiwe selehlile ngaphansi komugqa we-liquidus, i-nucleation nokukhula kwama-dendrites nakho kuyizinto ezikhuthaza ukwelulwa kwesidlali sefilimu se-oxide esicindezelwe kuma-agglomerate.

Ngemuva kokuqina kokuphonsa, inani elikhulu lama-interlayers amafilimu amancane we-oxide ngokwawo ayimifantu emincane, edlala indima yokusika i-matrix yensimbi. Vele, izakhiwo zemishini ye-alloy zizoncishiswa, kepha okuyingozi kakhulu ukufakwa kwama-pores nezimbobo ezincane zokuncipha. Njengoba izinga lokushisa lensimbi eliwuketshezi lincipha kancane kancane, ukuncibilika kwe-hydrogen ensimbi encibilikisiwe kuyaqhubeka nokwehla, kepha kunzima kakhulu nge-hydrogen ukuthi igudle insimbi ewuketshezi ngesimo sama-pores. Lapho esinye isigaba esisha (isigaba segesi) sikhiqizwa esigabeni samanzi esilinganayo, ngaso sonke isikhathi sakhiwa ukuhlanganiswa kwama-athomu noma ama-molecule ambalwa kuqala, futhi ivolumu yawo incane. Lesi sigaba esisha esincane sinendawo enkulu kakhulu ebanzi (okusho ukuthi, indawo engaphezulu ngevolumu yeyunithi). Ukukhiqiza isikhombimsebenzisi esisha, umsebenzi udinga ukwenziwa kuso. Lawa amandla esixhumi esibonakalayo sesigaba esisha, okungukuthi, indawo yaso kanye nokungezwani komhlaba. Umkhiqizo we. Cishe akunakwenzeka ukuthola inani elikhulu kangaka lamandla ngesikhathi sokupholisa kwe-aluminium alloy liquid. Noma ngabe kukhiqizwa ingqikithi yesigaba esisha, idinga amandla amaningi ukuze ikhule, futhi kungenzeka ukuthi ikhule kuphela lapho ubukhulu besigaba esisha budlula inani elithile elibucayi. Ingqikithi yesigaba esisha enosayizi omncane kunenani elibucayi ayinakukhula futhi izonyamalala yodwa. Ngokwethiyori, kunzima kakhulu ukuthi isigaba segesi sikhiqize i-nucleate futhi sikhule esigabeni soketshezi. Empeleni. Uma zingekho ezinye izinto ezincengayo, ngaphansi kwesimo sokuthi okuqukethwe yi-hydrogen kuyinto ejwayelekile, akunakwenzeka ukukhiqiza ama-pores ku-alloy aluminium alloy ehambelana nemvula ye-hydrogen.

Lapho insimbi encibilikisiwe iqukethe inani elikhulu lama-interlayers efilimu amisiwe, isimo sihluke kakhulu. Iningi le-oxide film interlayer limbozwe inani elincane lomoya. Lapho izinga lokushisa kwensimbi encibilikile lincipha futhi ukuncipha kwe-hydrogen okukuyo kuncipha, amabhamuza amancane omoya ku-oxide film interlayer ayivelisela i-hydrogen, kuthi i-hydrogen encibilikiswe ensimbi encibilikisiwe iye ngakuwo amagwebu omoya. Ukusabalalisa okuphakathi kulula kakhulu. I-hydrogen iyahlukahluka ibe amabhamuza amancane omoya, anwebe i-oxide film interlayer, bese enza izimbotshana ekusakazweni. Uma ukwelashwa kokuhlanzwa kuketshezi lwe-aluminium alloy kuhle futhi okuqukethwe kwe-hydrogen okusensimbi encibilikile kuphansi kakhulu, kuzoba nezimbotshana ezimbalwa ekubunjweni. Kodwa-ke, uma ingekho i-oxide film interlayer kule nsimbi encibilikisiwe, noma ngabe okuqukethwe kwe-hydrogen okusensimbi encibilikisiwe kuphezulu, i-hydrogen ingaqedwa kuphela ku-alloy esimweni esine-supersaturated ngesikhathi sokuqina, futhi akunakwenzeka ukukhiqiza ama-pores. Uma isimo sokudla sokusakaza asisihle, izimbotshana zokuncipha zizovela enqubeni yokuqina nokuncipha. Njengoba i-interlayer yefilimu ye-oxide ingenalutho, kulula ukuyihlukanisa, futhi izimbotshana zokuncipha zakhiwa kakhulu ku-interlayer wefilimu ye-oxide. Kulokhu, i-hydrogen encibilika ensimbi encibilikisiwe izophinde isabalale kuyo, kubangele ukuthi izimbotshana zikhule.

Ngokufingqa, kungacatshangelwa ukuthi nge-aluminium alloy castings, i-oxide film interlayer iyisizathu esiyinhloko sokuwohloka kwezakhiwo zemishini kanye ne-pinhole kanye ne-pore defects of the casting. Ukuze uthuthukise izakhiwo zomshini wento futhi ukhulise ubukhulu bokuphonsa, kubaluleke kakhulu ukuthatha izinyathelo zokuqeda i-oxide film interlayer kunokuqinisa ukusebenza kwe-degassing nokuhlanzwa.

Sicela ugcine umthombo nekheli lale ndatshana ukuze uphinde uprintwe: Ithonya Le-Metal oxide Film Kuzinga Le-Aluminium Alloy Castings

UMinghe Inkampani yeDie Casting anikezelwe ekukhiqizeni nasekuhlinzekeni ikhwalithi nokusebenza okuphezulu Izingxenye Zokulingisa (izingxenye zensimbi zensimbi zokufa zisebenza ikakhulukazi zibandakanya I-Thin-Wall Die Casting,I-Hot Chamber Die Casting,Cold Chamber die Casting), Insizakalo Eyindilinga (Insiza Yokulingisa,ICnc Machining,Ukwenza Okubandayo, Surface Treatment) .Noma ikuphi ukusakazwa kwe-Aluminium die, i-magnesium noma i-Zamak / zinc die casting nezinye izidingo zokuphosa zamukelekile ukuxhumana nathi.

Ngaphansi kokulawulwa kwe-ISO9001 ne-TS 16949, Zonke izinqubo zenziwa ngamakhulu emishini esezingeni eliphakeme yokufa, imishini ye-5-axis, nezinye izikhungo, ezisukela kuma-blasters kuya kumishini yokuwasha ye-Ultra Sonic.Minghe akagcinanga ngemishini esezingeni eliphezulu kepha futhi unobuchwepheshe iqembu lonjiniyela abanolwazi, ama-opharetha nabahloli ukwenza ukwakheka kwekhasimende kugcwaliseke.

Umenzi wenkontileka yokufa kwabasikiwe. Amandla afaka izingxenye ezibandayo ze-aluminium die casting ezivela ku-0.15 lbs. kuye ku-6 lbs., Ukusetha ushintsho olusheshayo, nemishini. Izinsizakalo ezingezwe ngenani zifaka phakathi ukupholisha, ukudlidliza, ukuphazamisa, ukuqhumisa ngokudubula, ukupenda, ukuhlobisa, ukumboza, ukuhlangana nokusetshenziswa kwamathuluzi. Izinto zokusebenza ezisetshenzisiwe zifaka ama-alloys afana no-360, 380, 383, no-413.

I-Zinc die casting design usizo / izinsizakalo zobunjiniyela ezihambisanayo. Umenzi wangokwezifiso we-precision zinc die castings. Ukusakazwa okuncane, ukukhishwa kwengcindezi ephezulu, ukusikeka kwesikhunta esiningi, ukujikijelwa kwesikhunta okuvamile, ukufefa kwamayunithi kanye nokuzimela okuzimele kanye nokuvalwa okuvaliwe komgodi kungenziwa. Ama-Castings angenziwa ngobude nobubanzi obufinyelela ku-24 in. Ku +/- 0.0005 in. Ukubekezelelana.  

I-ISO 9001: Umkhiqizi oqinisekisiwe ka-2015 we-die cast magnesium, Amandla afaka i-high-pressure magnesium die casting up to 200 ton chamber hot & 3000 ton cold chamber, designing designing, polishing, molding, machining, powder & liquid paint, QA full with CMM amakhono , inhlangano, ukupakisha nokulethwa.

Kuqinisekiswe i-ITAF16949. Insiza Eyengeziwe Yokulingisa Faka ukukhipha utshalomali,ukuphonsa kwesihlabathi,Ukuphonswa kwamandla, Lost Foam Ekubunjweni,I-Centrifugal Casting,Ukuphoswa Kokuqothula,Permanent Isikhunta Ukulingisa, Amakhono afaka i-EDI, usizo lobunjiniyela, ukumodeliswa okuqinile nokucutshungulwa kwesibili.

Izimboni Zokulingisa Izingxenye Zamacala Ezifundo Zezimoto: Izimoto, Amabhayisikili, Izindiza, Izinsimbi Zomculo, I-Watercraft, Amadivayisi we-Optical, Izinzwa, Amamodeli, Amadivayisi we-elekthronikhi, Ukuvaleka, Amawashi, Imishini, Izinjini, Ifenisha, Ubucwebe, AmaJig, Telecom, Ukukhanyisa, Amadivayisi Wezokwelapha, amadivayisi wezithombe, Amarobhothi, okubaziwe, okokusebenza komsindo, okwezemidlalo, i-Tooling, Amathoyizi nokuningi. 

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By Umkhiqizi weMinghe Die Casting | Izigaba: Izindatshana Eziwusizo |Material Omaka: I-Aluminium Casting, Zinc Ukulingisa, Ukulingiswa kweMagnesium, I-Titanium Casting, Insimbi Engagqwali, Brass Ekubunjweni,Ukulingiswa kweBronze,Isakaza ividiyo,Umlando wenkampani,I-Aluminium Die Casting | Amazwana Off