Paunonzwa 'colloidal silica investment casting', vanhu vazhinji vanobva vangofunga nezve binder-iyo chete mukaka wemukaka waunosanganisa mune slurry. Ndiyo nzvimbo yekutanga apo kufunga kunowanzotadza. Haisi kunama chete; ndiyo yese yakarongeka musana wegoko, uye mabatiro aunoita chemistry uye mashandisiro ayo anoraira kuti unowana kukanda kusina mhosva kana imba yekuchengetera izere nezviraswa. Ndakaona zvitoro zvichidurura mari muma premium alloys chete kuti irasikirwe yese pagoko risina kugerwa rakadonha kana kuti riine mweya. Mutambo chaiwo uri mucolloidal silica's particle size distribution, iyo pH kugadzikana, uye kutaura chokwadi, chirango chekutonga kwemaitiro, izvo vazhinji vanozvitarisira pasi kudzamara vatarisana nekutadza kunodhura.
Basa Risinganzwisisike reColloidal Silica
Ngatitorei zvakananga. Colloidal silica haisi chigadzirwa chimwe chete. Zvinhu zvaunowana kubva kune vakasiyana vatengesi vanoita zvakasiyana. Takadzidza izvi nenzira yakaoma makore adarika. Isu takachinjira kune yakachipa, off-brand colloidal silica yedu yegoko mold yekukanda maitiro, tichifunga kuti ma specs pabepa aive pedyo zvakakwana. Iyo sodium yemukati yaive yakakwira zvishoma. Zvakaguma nei? Mushure meiyo dewaxing nhanho, majasi ekutanga akagadzira micro-crazing. Hazvina kuoneka pakarepo, asi panguva yekupisa kwepamusoro-soro, mitswe miduku iyoyo yakapararira. Kukandwa kwekupedzisira, kunyanya muzvikamu zvakaoma zvesimbi isina tsvina, zvakaratidza kupinda kwesimbi kwakafanana. Kurasikirwa kwebatch zvachose. Ndipo payakadzvanya: iyo ionic kugadzikana uye iyo Na2O zvirimo mubhainda hazvitaurike paramita. Haisi nhumbi.
Izvi zvinosungirirana zvakananga mukudyara kwekudyara kweakakosha alloys senge nickel-based. Aya ma alloys ane mapoinzi ekunyungudika uye ari kuita zvinoshamisa. Kana goko racho risinganyatso tsigiro uye kugadzikana, unowana kupindirana kwesimbi-goko - chirema chakashata chinonzi slag inclusion kana kuti pamusoro pegomba. Iyo yakakwirira-kuchena, yakaderera-alkali colloidal silica yakakosha pano. Iyo inoumba yakasimba, yakawanda refractory silica network mushure mekupfura. Ndinoyeuka purojekiti yechikamu cheturbine kwatakashandisa bhainda rakajairwa; kupedzisa kwepamusoro kwaisagamuchirwa. Kuchinjira kune yakagadzirirwa, colloidal silica system ine yakaomarara particle kugovera yakagadziriswa. Dhiyabhorosi ari mumashoko iwayo.
Iwe unoona makambani akadai Qingdao Qiangsenyuan Technology Co., Ltd. (QSY) nemakumi matatu emakore mugomba mold uye kuisa mari. Vaizoziva izvi zvachose. Paunenge uchibata necobalt-based alloys zuva nezuva, haugone kubata binder sechinhu chinotevera. Kushanda kwavo kwenguva refu kunopa nzwisiso yakadzama, inoshanda yekudyidzana kwezvinhu izvi zvaunongowana kubva kudzokororo yekugadzira inomhanya uye kugadzirisa matambudziko.
Kudzora Maitiro: Ipo Theory Inosangana neShop Floor
Zvakanaka, saka une binder yakanaka. Iyo inotevera gomba ndeye slurry imba nharaunda. Tembiricha uye humidity control. Zvinonzwika sechinhu chakakosha, asi ndanga ndiri munzvimbo dzekuvakira uko uku kuri kufunga. Colloidal silica-based slurries inonzwa. Kana iyo shopu ichipisa zvakanyanya, iyo slurry gels yakakurumidza, iyo viscosity spikes, uye kukobvu kwako kwekuputira kunove kusingaenderane. Yakanyanya kunyorova, uye nguva yekuomesa pakati pejasi inotambanudzwa, ichiuraya yako yekugadzira rhythm. Takava nezhizha apo AC yakakundikana muimba ine slurry. Kugadzirwa kwese kwe Investment casting mateko emitumbi yevharuvhu aifanira kukururwa nekuti bhachi rekutanga rakawomeswa nekukasira, zvichigadzira isina kusimba pamwe neanotevera akaturikidzana.
Dipping uye stuccoing maitiro ndeimwe hunyanzvi. Bhachi rekutanga ndiro zvese. Inoda kunyatso dzokorora zvakadzama zvepateni yewakisi. Isu tinoshandisa yakanakisa zircon hupfu musanganiswa neiyo colloidal silica yejasi iro rekutanga. Asi iyo yekunyorovesa iyo yekumisikidza inofanirwa kuve panzvimbo. Zvishoma, uye iwe unowana mabhuru uye voids pane iyo pateni yepamusoro. Yakawandisa, uye slurry inomhanya, ichigadzira mavara matete. Ichi hachisi chinhu chaunoseta kamwe wokanganwa. Iyo wakisi pateni zvinhu, tembiricha yepasi, kunyangwe iyo inoburitsa inoshandiswa pakufa, zvese zvinoikanganisa. Iko kugadzirisa nguva dzose.
Uye kuomesa. Kuomeswa kwemhepo kwakajairwa, asi kuyerera kwemhepo kunofanira kunge kuri laminar, kwete kunyongana. Iwe haudi guruva kubva pasi (iyo inowanzozara neyakapfuura stucco zvinhu) ichizvinyudza mukati mejasi rakanyorova. Isu takavaka yakapfava yakanaka-yekudzvanya dumba yekuomesa majasi ekutanga, uye mwero wekuremara kubva kune inclusions wakadzikira zvakanyanya. Aya ndiwo mashoko asina kunaka, ane mari yakawanda anoparadzanisa nzira yakavimbika kubva kune ine mhirizhonga.
Case in Point: Shell Molds for Complex Geometries
Tora yakaoma impeller kukanda, mashizha matete, akadzika contours. Chinetso chacho hachisi kungoita kuti goko racho rive nesimba zvakakwana; iri kuita kuti ipindike zvakakwana kubvumira magasi kubuda panguva yekudira uye kupera simba. Apa ndipo pane iyo colloidal silica binder's gel chimiro chakakosha. Kana iwe ukanyanya kudzikamisa slurry kuti uwane nguva yakareba yekushanda, unogona kukanganisa iyo gel's micro-porosity mushure mekupfura. Inobva yanyanya kukora.
Takaedza nekuwedzera yakanyatsonaka, inodzorwa huwandu hweanonyorova uye kugadzirisa iyo gelling agent (kazhinji alkali munyu) kuti tigadzirise izvi. Chinangwa chaive goko raipfuura bvunzo dzesimba asi zvakare raive nepamusoro pegasi permeability. Kubudirira kwacho kwakauya kubva kwete kungotarisa kune binder data sheet, asi kubva mukumhanyisa edu ega bvunzo dzepermeability pamasampula egomba akadzingwa. Isu takabatanidza akasiyana slurry mabheti nechaiwo ekukanda mhedzisiro yezvikamu zvesimbi. Iyo data yaive yakashata, asi maitiro aive akajeka: yakadzikira zvishoma viscosity slurry, yakashandiswa mumajasi matete ekutanga, yakaburitsa zvirinani kupfurwa chimiro chezvikamu izvi zvakaomarara.
Rudzi urwu rwekugadzirisa matambudziko ndiwo musimboti wepamberi shell mold casting. Harisi bhuku. Zviri pamusoro pekugadzira yako yemukati dhatabhesi yechikonzero nemhedzisiro. Kambani yakaita seQSY, inoshanda mune zvese kukanda uye CNC machining, ingangove ine yakasimba mhinduro loop. Ivo vanogona kumhanyisa kukanda, ona subsurface chirema kubva kune shell nyaya, uye kuitsvaga ichidzokera kune chaiyo slurry batch kana kuomesa paramende. Iko kugona kwakabatanidzwa kune simba.
Iyo Alloy Factor: Nei Material Inoraira Binder Sarudzo
Izvi zvinondiunza kuzvinhu. Kushanda nesimbi yakaumbwa inyika imwe; kushanda ne reactive superalloys ndeimwe. Kune nickel kana cobalt-based alloys, goko rinofanirwa kunge risiri rakasimba chete, asiwo kemikari inert. High-alumina refractories inowanzoshandiswa mumajasi ekuchengetedza. Asi binder — iyo colloidal silica — ndiyo yepasirese matrix inoibata pamwe chete. Chero kusachena kana kusagadzikana pano inzvimbo inogona kutadza pa1500 ° C+.
Takambova nedambudziko rekutsemuka kwedhaka panzvimbo hombe, dzakati sandarara dzesimbi isina tsvina. Goko racho raitaridza kunge risati radirwa. Dambudziko raive rekupisa kwekuwedzera kusawirirana pakati peiyo colloidal silica gel uye refractory filler mujasi rechiso. Binder pachayo yakanga yakaoma zvakanyanya mushure mekuoma. Mhinduro yaisanganisira kusanganisa chikamu chidiki chechimwe chigadzirwa checolloidal silica chine yakagadziridzwa particle morphology mune yedu yekutanga slurry. Yakagadzira inoregerera gel network iyo inogona kugarisa kushushikana kwekupisa pasina kuputika. Iyi haisi nzira yakajairika. Yakanga iri gadziriso yakazvarwa nekudikanwa.
Iyi nhanho yekuchinjisa zvinhu-yakanyanya kukosha. On the QSY webhusaiti, vanonyora basa ravo nemaaloyi chaiwo. Chero ani ari mundima iyi anoziva chirevo ichi chinoreva yakadzika, maoko-pane raibhurari yemaparamita ezvese zvezvinhu zvemhuri. Iyo colloidal silica system yecobalt alloy ichave ine nuances ichienzaniswa neiyo yeyakajairwa kabhoni simbi. Inogona kunge iri mhando yakasiyana, musanganiswa wakasiyana, kana seti inodzorwa zvine hungwaru yemaparamita ane matope.
Pfungwa dzekupedzisira: Ihurongwa, Kwete Ingredient
Saka, kupeta izvi, kiyi yekutora pairi colloidal silica investment casting ndiko kurega kuona iyo colloidal silica sechinhu chakangotengwa chete. Ndiyo chikamu chepakati chesisitimu inonzwisisika, inodyidzana. Wakisi, mamiriro ezvinhu akapoteredza, hupfu hwefurawa, jecha restucco, nzira yokuomesa, uye pakupedzisira, alloy iri kudururwa—zvose zvinotaura neanosungira. Maitiro emubhainda ndiyo nzira yekupedzisira yakajairika.
Hunyanzvi chaihwo huri mukududzira zviratidzo. Kuchinja kudiki mu slurry drain time. Musiyano usingaoneki mukupenya kwejasi rakaomeswa. Kusiyana kwesimba kudiki muchikamu chekuyedza chakadzingwa. Izvi ndizvo zvinhu zvinokuudza kana maitiro ako ari kutonga. Zviri empirical, dzimwe nguva zvinoshungurudza zvakadaro. Iko hakuna mhinduro imwechete yechokwadi, chete mhinduro chaiyo kune yako chaiyo chitoro, midziyo yako, uye chigadzirwa chako musanganiswa.
Ndosaka kurarama kwenguva refu mubhizinesi iri, senge makore makumi matatu nhoroondo yefemu yakaita seQSY, chiratidzo chinovimbika. Zvinoreva kuti vangangotenderera nemumatambudziko aya, vakawana mhinduro dzavo, uye vakadzikamisa maitiro avo. Kune ani nani anopinda mune izvi, remekedza iyo colloidal silica maitiro. Chengetedza mari yekuyeresa michina ye slurry paramita. Log zvese. Iva wakagadzirira kuisa maoko ako akasviba uye kugadzirisa. Musiyano pakati pepurofiti uye kurasikirwa kazhinji mune iyo mukaka chena mvura uye kuti iwe unosarudza kuibata sei.
