Xa usiva 'i-colloidal silica investment casting', abantu abaninzi bacinga ngoko nangoko ngesibophelelo-kanye olo lwelo lubisi oluxuba eludaka. Yindawo yokuqala apho ukucinga kuhlala kuphosakele. Asiyoglu nje; ngumqolo wesakhiwo sonke seqokobhe, kunye nendlela oyilawula ngayo ikhemistri kunye nokusetyenziswa kwayo kuyalela ukuba ufumana ukuphosa okungenasiphako okanye indawo yokugcina impahla egcwele izinto ezilahliweyo. Ndikhe ndabona iivenkile zigalela imali kwi-premium alloys kuphela ukuze iphulukane nayo yonke kwiqokobhe elingekho kakuhle eliye ladilika okanye linemiqolo. Umdlalo wokwenyani ukwi-colloidal silica's size size distribution, i-pH uzinzo, kwaye ngokungafihlisiyo, isiyalo solawulo lwenkqubo, abaninzi abalujongela phantsi de bajongane nokusilela okunexabiso elikhulu.
Indima engaqondakaliyo yeColloidal Silica
Makhe sicacise. IColloidal silica ayiyomveliso enye. Izinto ozifumana kubathengisi abohlukeneyo ziziphatha ngendlela eyahlukileyo. Sakufunda kabuhlungu oku kwiminyaka eyadlulayo. Sitshintshele kwi-silica ye-colloidal engabizi kakhulu, engaphandle kophawu lwenkqubo yethu yokubunjwa kweqokobhe, sicinga ukuba i-specs kwiphepha isondele ngokwaneleyo. Umxholo wesodium wawuphezulu kancinci. Isiphumo? Emva kwenqanaba le-dewaxing, iidyasi eziphambili zaphuhlisa i-micro-crazing. Akuzange kubonakale ngokukhawuleza, kodwa ngexesha lobushushu obuphezulu, ezo ntanda zincinci zanda. Ukusaswa kokugqibela, ngakumbi kwiindawo ezintsonkothileyo zentsimbi, kubonise ukungena kwentsimbi okungaguqukiyo. Ilahleko yebhetshi iyonke. Kulapho yacofa khona: uzinzo lwe-ionic kunye nomxholo we-Na2O kwi-binder ziiparameters ezingaxoxiswana. Asiyonto yorhwebo.
Oku kubophelelana ngokuthe ngqo kutyalo-mali lwe-alloys ekhethekileyo njenge-nickel-based. Ezi alloys zineendawo eziphezulu zokunyibilika kwaye zisebenza ngokumangalisayo. Ukuba iqokobhe alichanekanga ngokugqibeleleyo kwaye alizinzile, ufumana ukudibana kwesinyithi-iqokobhe-isiphako esibi esibizwa ngokuba yi-slag inclusion okanye umngxuma womphezulu. Ukucoceka okuphezulu, i-alkali ephantsi ye-colloidal silica ibalulekile apha. Yenza inethiwekhi ye-silica eyomeleleyo, echasayo ngakumbi emva kokudubula. Ndikhumbula iprojekthi yecandelo leinjini yomoya apho sasisebenzisa isibophelelo esiqhelekileyo; umphezulu wokugqiba wawungamkelekanga. Ukutshintshela kwisixhobo esilungiselelwe, i-colloidal silika inkqubo enosasazo olungqongqo lwamasuntswana asonjululwe. Umtyholi ukuzo nkcukacha.
Ubona iinkampani ezinje Qingdao Qiangsenyuan Technology Co., Ltd. (QSY) ngamashumi amathathu eminyaka kubumba iqokobhe kunye notyalo-mali. Baya kukwazi oku ngokucokisekileyo. Xa ujongana ne-cobalt-based alloys imini nobusuku, awukwazi ukukwazi ukuphatha i-binder njenge-afterthought. Umsebenzi wabo wexesha elide ucebisa ukuqonda okunzulu, okusebenzayo kwezi ntsebenziswano eziphathekayo ozifumana kuphela kwiimveliso eziphindaphindiweyo kunye nokusombulula iingxaki.
Ulawulo Lwenkqubo: Apho Ithiyori idibana noMgangatho wevenkile
Kulungile, ngoko unesibophelelo esihle. Umngxunya olandelayo yindawo yegumbi elinodaka. Ulawulo lobushushu kunye nokufuma. Kuvakala kusisiseko, kodwa bendikwiziseko apho le yingcamango yamva. I-slurries esekwe kwiColloidal silica inovakalelo. Ukuba ivenkile ishushu kakhulu, iijeli ze-slurry zikhawuleza kakhulu, i-viscosity spikes, kwaye ubukhulu bakho bokwambathisa buba buguquguqukayo. Kufumeme kakhulu, kwaye ixesha lokumisa phakathi kweedyasi liyanwenwa, libulala isingqi sakho semveliso. Sasinehlobo apho i-AC yasilela kwigumbi elinodaka. Imveliso yonke ye utyalo mali amaqokobhe emizimba yevalvu kwafuneka akhunyulwe ngenxa yokuba idyasi yeprimer yomile ngokukhawuleza, idala ujongano olubuthathaka kunye nezaleko zestucco ezilandelayo.
Inkqubo yokudipha kunye ne-stuccoing yobunye ubugcisa. Idyasi yokuqala yinto yonke. Kufuneka iphindaphinde ngokugqibeleleyo iinkcukacha zepateni ye-wax. Sisebenzisa umxube womgubo we-zircon ocolekileyo kakhulu kunye ne-silica ye-colloidal yaloo dyasi yokuqala. Kodwa ugxininiso lwe-arhente yokumanzisa kufuneka lubekwe kwindawo. Incinci kakhulu, kwaye ufumana amaqamza kunye ne-voids kumphezulu wepateni. Kakhulu, kwaye i-slurry ibaleka, idala amabala amancinci. Le asiyonto oyibeka kanye kwaye uyilibale. Izinto zepateni ye-wax, ubushushu bayo bomphezulu, kunye ne-ejenti yokukhulula esetyenziselwa ukufa, zonke ziyayichaphazela. Luhlengahlengiso oluqhubekayo.
Kwaye ukomisa. Ukomisa umoya ngenkani kuqhelekile, kodwa ukuhamba komoya kufuneka kube yilaminar, kungabi nesiphithiphithi. Awufuni uthuli olusuka emgangathweni (oluhlala luzele yimathiriyeli yestucco yangaphambili) luzifake kwidyasi emanzi. Sakhe idokodo elilula elinoxinzelelo olulungileyo lokomisa iidyasi zokuqala, kwaye izinga lesiphako elisuka kwi-inclusions lehla ngokubonakalayo. Ezi ziinkcukacha ezingathandekiyo, ezinemali eninzi ezahlula inkqubo ethembekileyo kwisiphithiphithi.
I-Case in Point: I-Shell Molds ye-Complex Geometries
Thatha i-impeller casting, iincakuba ezibhityileyo, iicontours ezinzulu. Ucelomngeni asikokwenza iqokobhe lomelele ngokwaneleyo; yenza ukuba kungeneke ngokwaneleyo ukuvumela iigesi ukuba zibaleke ngexesha lokugalelwa kunye nokudinwa. Kulapho ijeli ye-colloidal silica binder ingundoqo. Ukuba uzinzisa kakhulu i-slurry ukuze ufumane ixesha elide lokusebenza, unokubeka esichengeni i-micro-porosity yejeli emva kokudubula. Iba xinene kakhulu.
Siye sazama ukongeza kakuhle kakhulu, izixa ezilawulwayo ze-ejenti yokumanzisa kunye nokulungelelanisa i-agent ye-gelling (ehlala ityuwa yealkali) ukulungisa kakuhle oku. Injongo yayiyigobolondo ephumelele iimvavanyo zamandla asemgangathweni kodwa yayinokungena kwegesi ephezulu. Impumelelo ivele ngokungajongi nje kwiphepha ledatha yesibophelelo, kodwa ngokuqhuba ezethu iimvavanyo zokungena kwisampulu ezikhutshiweyo. Sinxibelelanise iibhetshi ezahlukeneyo zodaka kunye neziphumo zokwenyani zokuphosa izinto zentsimbi. Idatha yayimdaka, kodwa imeko yayicacile: i-viscosity slurry esezantsi kancinane, isetyenziswe kwiidyasi ezibhityileyo zeprayimari, ivelise ulwakhiwo olungcono lokudubula kwezi ndawo zintsonkothileyo.
Olu hlobo lokusombulula ingxaki ngundoqo wenkqubela phambili iqokobhe ngundo ukuphosa. Ayiyoncwadi yokufunda. Imalunga nokwenza eyakho idatabase yangaphakathi yesizathu kunye nesiphumo. Inkampani efana ne-QSY, egxile kuzo zombini ii-casting kunye ne-CNC machining, kusenokwenzeka ukuba inengxelo ebambeneyo. Banomatshini wokuphosa, babone isiphene esingaphantsi komhlaba kwimiba yeqokobhe, kwaye bayilandele emva kwibhetshi ethile eludaka okanye iparamitha yokomisa. Obo buchule buhlanganisiweyo bunamandla.
I-alloy Factor: Kutheni le nto iMaterial iyalela ukuKhetha iBinder
Oku kuzisa kum kwizixhobo. Ukusebenza ngentsimbi etyhidiweyo lihlabathi elinye; ukusebenza nge superalloys reactive yenye. Kwi-nickel okanye i-cobalt-based alloys, igobolondo ayifuni nje ukuba namandla, kodwa kunye ne-inert yekhemikhali. Iirefractories eziphezulu ze-alumina zihlala zisetyenziswa kwiidyasi zokugcina. Kodwa i-binder-colloidal silica-yimatrix yendalo yonke ebambe yonke kunye. Nakuphi na ukungcola okanye ukungazinzi apha yindawo enokuthi ingaphumeleli kwi-1500 ° C +.
Sakhe saba nengxaki yokuqhekeka kodaka kwiindawo ezinkulu, ezisicaba zeplate yentsimbi. Iqokobhe lalikhangeleka lilungile phambi kokuba ligalelwe. Ingxaki yayiyingxaki yokwandiswa kwe-thermal phakathi kwejeli ye-silica ye-colloidal kunye ne-refractory filler kwi-coat face. Isibophelelo ngokwaso sasiqine kakhulu emva kokoma. Isisombululo sasibandakanya ukudibanisa ipesenti encinci yemveliso ye-silica ye-colloidal eyahlukileyo kunye ne-particle modified particle morphology kwi-slurry yethu ephambili. Yakha inethiwekhi yejeli exolela ngakumbi enokuthi ibambe uxinzelelo lwe-thermal ngaphandle kokuqhekeka. Le asiyonkqubo eqhelekileyo. Yayilulungiso oluzalwe yimfuneko.
Eli nqanaba lokuziqhelanisa nemathiriyeli ethile libalulekile. Kwi Iwebhusayithi ye-QSY, badwelisa umsebenzi wabo ngee-alloys ezikhethekileyo. Nabani na kule ntsimi uyazi ukuba ingxelo ithetha ubunzulu, ithala leencwadi leeparamitha zenkqubo yosapho ngalunye. Inkqubo ye-silica ye-colloidal ye-cobalt alloy iya kuba ne-nuances xa kuthelekiswa nenye yentsimbi ye-carbon standard. Isenokuba luphawu olwahlukileyo, umxube owahlukileyo, okanye iseti elawulwa ngobuchule yeeparamitha ezinodaka.
Iingcinga zokugqibela: Yinkqubo, hayi isithako
Ke, ukusonga oku, iqhosha lokuthatha colloidal silica investment casting kukuyeka ukujonga i-colloidal silica njengesithako esithengiweyo. Lilungu elingundoqo lenkqubo ebuthathaka, exhomekeke kwelinye. Umthwebeba, iimeko ezikuyo, umgubo oxutywe nentlabathi, istucco, iprotocol yokumisa, yaye ekugqibeleni, ukugalelwa ingxubevange—zonke zithetha nomdibanisi. Indlela yokuziphatha komdibanisi yindlela yokugqibela eqhelekileyo.
Ubuchwephesha bokwenyani busekutolikweni kwemiqondiso. Utshintsho oluncinci kwixesha le-slurry drain. Ukwahlukana okufihlakeleyo kwiglosi yengubo eyomileyo. Ukwahluka kwamandla amancinci kwisiqwenga sovavanyo esitshisiweyo. Ezi zizinto ezikuxelela ukuba inkqubo yakho ilawula. Inamandla, ngamanye amaxesha iyakhathaza. Akukho mpendulo ichanekileyo, yimpendulo echanekileyo kuphela kwivenkile yakho ethile, izixhobo zakho, kunye nomxube wemveliso yakho.
Yiyo loo nto ixesha elide kweli shishini, njengembali ye-30 yeminyaka yefemu efana ne-QSY, luphawu oluthembekileyo. Kuthetha ukuba kusenokwenzeka ukuba bakhwele ezi ngxaki, bafumana izisombululo zabo, kwaye bazinzisa iinkqubo zabo. Nabani na ongena kule nto, hlonipha inkqubo ye-colloidal silica. Tyala izixhobo zokulinganisa iiparamitha ezinodaka. Faka yonke into. Zilungiselele ukungcolisa izandla zakho kwaye wenze uhlengahlengiso. Umahluko phakathi kwenzuzo kunye nelahleko kaninzi kulwelo olumhlophe olubisi kunye nendlela okhetha ukululawula ngayo.
