Lapho onjiniyela bayacacisa i-colloidal silica investment casting ezingxenyeni zensimbi ezinobuqotho obuphezulu, abagcini nje ngokukhetha inqubo—bakhetha isiqinisekiso sokusebenza. Ukuzinza kwe-Dimensional ngaphansi kokuhamba ngebhayisikili okushisayo. Ukuqedwa kwendawo okuqeda ukugaya kwangemuva. Ukulawulwa kwe-Microstructure kuma-cobalt alloys lapho yonke imingcele yokusanhlamvu ibalulekile. Lezi akuzona izinzuzo zethiyori. Kuyimiphumela esiyibona nsuku zonke endaweni yethu ethobela i-ISO e-Qingdao—lapho yonke iqoqo le-AMS 5387 cobalt alloy pump housing noma i-T800 nozzle idlula ekuhlolweni okuzimele kwe-CMM okuthathu ngaphambi kokushiya umugqa.
Kungani i-colloidal silica investment casting iletha lapho ezinye izindlela zimi khona
I-Colloidal silica slurries yenza amagobolondo e-ceramic aqinile, azinze ngokushisa kakhulu kune-ethyl silicate binders evamile. Lawo mandla ahumusheka ngokuqondile ekuqhekekeni kwamagobolondo ambalwa ngesikhathi sokucwiliswa kwewaxisi nokudubula—kanye nokungabekezeleli nhlobo ukuhlanekezela ezindlini zamasilinda anezindonga ezincane ezilinganiselwe isevisi ye-hydraulic yamabha angu-420. Silinganise ukunwetshwa kwegobolondo ku-0.012% nge-°C ngayinye kufika ku-1100°C; abancintisana nabo abasebenzisa ingilazi yamanzi noma amasistimu e-alumina-bonded ngokuvamile adlula u-0.035%. Lowo mehluko? Igebe eliphakathi kokushaya okuthi ±0.05 mm GD&T endaweni yephampu yepiston engu-320 mm—futhi ukuyilaxaza ngemva kokuhlola i-athikili yokuqala.
Asikusebenzisi ukulingisa kwe-colloidal silica njengomugqa ozimele. Ihlanganiswe nokunemba kwemishini ye-CNC ekuhambeni komsebenzi okukodwa: phonsa ijiyomethri eyinhloko, izindawo zokuvala ezibalulekile zomshini kanye namafomu entambo, bese usebenzisa ukwelashwa okulawulwayo okushisa *ngaphandle kokuhlehlisa ukulandeleka*. Awekho ama-handoffs. Akukho ukuhlonza kabusha okubalulekile. Yonke ingxenye iphethe i-laser-etched lot ID exhuma emuva kuma-cert we-raw material, ama-shell dip log, amashadi esithandweni somlilo, nemibiko yokugcina ye-CMM.
Lokhu kuhlanganiswa kuxazulula iphuzu lobuhlungu bangempela: i-warpage ekubunjweni kwensimbi ye-alloy ephezulu. Ikhasimende lake lasilethela umzimba wevalvu yensimbi engagqwali eyasonteka ngo-0.18 mm ngemva kokudambisa ingcindezi—ngoba umphakeli walo usakaza, wathunyelwa, futhi wavumela ikhasimende ukuthi liphathe ukwelashwa kokushisa ngokuhlukana. Sakha kabusha sisebenzisa isitoko esifanayo sebanga le-T800, kodwa sabamba ingxenye esithandweni sethu sevacuum ngokushesha ngemva kokunyakaziswa. Ukuhlanekezela kokugcina: 0.023 mm. Hhayi umlingo. Umlando oshisayo osanda kulawulwa—kanye nobunikazi benqubo egcwele.
Yini eyenza imboni ye-colloidal silica investment casting yangempela yehluke
Izitolo eziningi zizibiza ngokuthi “izimboni zokutshala imali.” Bambalwa abangabanikazi bokwakhiwa kwe-colloidal silica slurry, izivumelwano zokomisa amagobolondo, kanye namaphrofayili erempu ephuma ewaxing achaza impumelelo ngama-superalloy. Kwa-QINGDAO QIANGSENYUAN TECHNOLOGY CO., LTD., silinganisa i-viscosity masonto onke sisebenzisa ama-viscometer e-Brookfield, siqapha ukukhukhuleka kwe-pH ngesikhathi sangempela, futhi senqaba noma iyiphi inqwaba ye-slurry ngaphandle kuka-9.2–9.6 pH—ngisho noma ibonakala iphelele. Kungani? Ngoba i-pH iyashintsha ishintsha amandla e-silica particle zeta, eshintsha ukuminyana kwegobolondo, ukufinyeleleka, futhi ekugcineni, ukuhwaqeka kwendawo (Ra) ezingxenyeni eziqediwe. Sibonile u-Ra egxuma esuka ku-1.8 µm ukuya ku-4.3 µm lapho i-pH ikhukhuleka yaba ngu-9.8.
Ukuqhunyiswa kwamagobolondo sikubheka njengensimbi—hhayi nje izitsha zobumba. I-kilns yethu inyuka ngo-≤60°C/ihora ifike ku-1050°C, ibambe imizuzu engu-90, bese ipholisa ku-≤40°C/ihora. Lowo mjikelezo ohamba kancane uvimbela i-microcracking ezingxenyeni eziwugqinsi ze-cobalt-nickel castings. Iphampu eyodwa ye-OEM yase-Europe ishintshele kithi ngemuva kokuthi abahlinzeki ababili bangaphambili belethe amahabhu e-AMS 5387 aqhekekile. Ukuhlaziywa kwembangela yazo kubonise ukuphuka kokushaqeka okushisayo okuvela ezindaweni ezihlanganayo zegobolondo kuya kwensimbi. Iphrofayili yethu yokudubula yabaqeda. Hhayi ngokushintsha ingxubevange—kodwa ngokuhlonipha indlela igobolondo eliphefumula ngayo.
- Izinto zokusetshenziswa eziqinisekisiwe kuphela-yonke ikhoyili elandelekayo emibikweni yokuhlolwa kokugaya
- Akukho ukwenza amagobolondo angaphansi kwenkontileka noma ukucwiliswa kwewaxisi—ukulawula inqubo yangaphakathi engu-100%.
- Ukubuyekezwa komklamo wokuqala we-GD&T: sihlaba umkhosi ama-engeli asalungiswa angaphansi kuka-0.5° ngaphambi kokuthi kuqale ukusebenza
- Ukuqinisekiswa kokuqedwa kobuso kuma-profilometer okubona—hhayi nje ukuhlola okubukwayo
Izinhlelo zokusebenza zomhlaba wangempela lapho ukusakaza kwe-silica ye-colloidal kufakazela ukuthi akuxoxiswana
Amavalvu okucindezela kawoyela ogwini lolwandle negesi ehlukahlukene adinga ukusebenza okungavuzi ku- -46°C kuya ku-+121°C. Ukufakwa kwesihlabathi akukwazi ukubamba ukugxila kwesihlalo okungu-0.02 mm okudingekile. Ukukhishwa kwezimali okujwayelekile kunenkinga ngesisindo esishisayo sezindlu ze-ASTM A494 M35-1. I-Colloidal silica yenza kokubili: ukubekezelela okuqinile *kanye* nobuqotho obungena-crack kuwo wonke ama-gradient ashisayo.
Muva nje sikhiqize ama-centre shaft roller amasistimu ewintshi yemoto yobunjiniyela—izingxenye ezino-220 mm OD, 45 mm ukujiya kodonga, kanye nejometri ye-spline yangaphakathi. Ikhasimende belidinga ubulukhuni ≥58 HRC *ngesigaba*, hhayi nje ukuqina kwekesi. I-Colloidal silica inike amandla ukujiya kwegobolondo elifanayo, izilinganiso zokuqina ezingaguquki, kanye ne-zero porosity endaweni ebalulekile ethwala umthwalo. Isikhathi somshini sehle ngo-37% uma kuqhathaniswa nezikhala ze-sand-cast ngenxa yokuthi silethe umumo oseduze nenethi ngokusatshalaliswa kwesitoko okubikezelwayo.
Amanye amacala okusetshenziswa afakazelwe afaka:
- Imibhobho ye-cobalt alloy yamaphampu e-slurry abrasive abrasive anesivinini esiphezulu (ibanga le-T800, 62–65 HRC)
- Izisekelo zephampu ezidinga ukucaba ≤0.08 mm ngaphezu kobude obungu-850 mm
- Izithwali ze-piston rod ezingajwayelekile ezinamashaneli okupholisa ahlanganisiwe—asakazwa, angashiselwe
Ukukhetha imboni yakho ye-colloidal silica investment cast akukona umthamo—kumayelana nekhono
Uma ingxenye yakho idinga i-AMS 5387, T800, noma i-UNS R30005—futhi kufanele isinde emijikelezweni yokucindezela engu-10,000+ ngaphandle kokuqaliswa kwe-microcrack—udinga okungaphezu kwe-Foundry. Udinga umlingani ophatha i-colloidal silica hhayi njenge-binder, kodwa njenge-variable metallurgical. Ubani oqinisekisa amandla egobolondo ngokuhlolwa kokucindezelwa kwe-ASTM C133—hhayi nje ukuhlola okubonakalayo. Ubani oxhumanisa konke ukungasebenzi kahle kokulingisa ekushintsheni kwepharamitha ethile: ubudala obunodaka, izinga lokuphuma kwewaxing, noma ngisho nomswakamo we-ambient ngesikhathi sokucwiliswa.
QINGDAO QIANGSENYUAN TECHNOLOGY CO., LTD. isebenza ngaleyo ndlela-hhayi ngoba ilula, kodwa ngoba izingxenye ezibalulekile zemishini azishiyi indawo yokuqagela. Sishicilela amawindi ethu enqubo ye-colloidal silica. Sabelana ngedatha yokuminyana kwegobolondo namakhasimende. Sivumela onjiniyela ukuthi bahlole amalogi ethu okulinganisa e-CMM. Lokho kubeka obala akukhona ukumaketha. Uqinisekisa kanjani ukuthi "imboni ye-colloidal silica investment casting" ephepheni ifana nalokho okwenzeka phansi esitolo.
Ezingxenyeni zensimbi ezinembayo lapho ukwehluleka akuyona inketho, imboni efanele ayigcini nje ukuphonsa insimbi. Ikhipha ukuzethemba.
