Sintering ndi kugunda kwa mtima kwa zitsulo za ufa-pomwe zitsulo zotayirira zimasandulika kukhala zowundana, zogwira ntchito. Pamalo athu okhazikika ku Qingdao, tasokoneza magulu a 12,000 a cobalt-nickel ndi zitsulo zosapanga dzimbiri kuyambira 2018. Kuthamanga kulikonse kolephera kunatiphunzitsa chinachake: mitengo yokwera kutentha imakhala yofunika kwambiri kuposa nthawi yogwira ntchito ya AMS 5387 nozzles; kuyera kwa mlengalenga kumapangitsa kapena kuswa kukhulupirika kwa pulagi ya T800; ndi kuyika ng'anjo kumakhudza mwachindunji kukhazikika kwapampu ya piston pampu ya silinda. Izi sizinthu zowonera m'mabuku-ndi maphunziro ochokera ku mizere yeniyeni yopangira ma hydraulic valves ovotera 420 MPa ndi ma winch center shaft rollers omwe amawonekera ku dzimbiri-kupopera mchere kwa maola 1,500+.
Sintering Wamba: Komabe Ntchito Yogwira Ntchito-Pamene Ikuyenera
Makasitomala ambiri amaganiza kuti sintering wamba imatanthauza "kungotenthetsa mumlengalenga." Zolakwika. M'ng'anjo zathu zovomerezeka ndi ISO, sintering wamba imatanthawuza kuwongolera kolondola kwamitundu itatu: kuchuluka kwa kutentha (nthawi zambiri 3-5 ° C / min), kutentha kwapamwamba (1120-1280 ° C kwazitsulo zosapanga dzimbiri, 1320-1380 ° C kwa ma aloyi a cobalt), ndikukhala nthawi (30-90 mphindi). Timagwiritsa ntchito mpweya wa endothermic (N₂–H₂ mix) pazigawo zosapanga dzimbiri ndi argon oyeretsedwa kwambiri a T800 ndi AMS 5387-chifukwa ngakhale mpweya wa 20 ppm umayambitsa okosijeni pamtunda womwe umawononga malo osindikizira a valve. Njira iyi imapereka 92-95% kachulukidwe kamalingaliro. Ndiwotsika mtengo komanso wobwerezabwereza-koma osati pazigawo zomwe zimafunikira> 97% kachulukidwe kapena ma geometri ovuta okhala ndi makoma owonda. Timakana njira iyi ya ma nozzles a aloyi a cobalt omwe amafunikira zero porosity yamkati pamayendedwe ovuta.
Sintering-Assisted Sintering: Density Without Compromise
Makasitomala akafuna kachulukidwe wathunthu popanda makina a post-sinter, timasinthira kunjira zothandizidwa ndi kukakamiza. Kutentha kwa Isostatic Pressing (HIP) kumagwiritsa ntchito 100-200 MPa argon pressure mofananamo pamene kutentha-kukakamiza ma pores otsalira kutsekedwa. Timagwiritsa ntchito HIP panyumba iliyonse yapampu ya AMS 5387 yopita ku subsea mafuta & gasi. Chotsatira? 99.8% kachulukidwe, 15% moyo wotopa kwambiri, ndikuchotsa zolakwika zazing'ono zomwe zimayambitsa kutayikira koyambirira pamapulogalamu apamwamba kwambiri. Spark Plasma Sintering (SPS) imagwira ntchito mosiyana: pulsed DC yaposachedwa imadutsa molunjika pophatikizira ufa, ndikupangitsa kutentha kwambiri (mpaka 1000 ° C / min) ndikuchepetsa nthawi yozungulira. Timatumiza SPS pazigawo zosagwirizana ndi T800 pomwe geometry imalepheretsa kutentha kwa HIP - monga maziko a pampu asymmetrical okhala ndi zingwe zophatikizika. Njira zonsezi zimawononga 2.3-3.7 × kuposa sintering wamba-koma kudula zinyalala ndi 68% pazigawo zamagalimoto ovala apamwamba.
Zosiyanasiyana Zoyendetsedwa ndi Atmosphere: Kumene Chemistry Imakumana ndi Geometry
Atmosphere sikuti imangoletsa kutulutsa okosijeni - imatenga nawo gawo pakuyimba. Mu sintering wa haidrojeni, H₂ imachepetsa ma oxide apansi ndikulimbikitsa kufalikira kwamadzi. Timachigwiritsa ntchito popanga chitsulo chomwe chimafuna kuti maginito azitha kulowa mu hydraulic solenoid cores. Vacuum sintering imachotsa mpweya wonse wotuluka koma imafuna ukhondo wokhazikika - mafuta aliwonse otsalira amasungunuka mwamphamvu, kuchititsa matuza. Timasungira vacuum ya cobalt alloy plugs komwe kujambula kwa kaboni kuchokera kumlengalenga wokhala ndi nayitrogeni kumatha kusokoneza kukana kutentha kwambiri. Pazifukwa zapampu zachitsulo zosapanga dzimbiri zomwe zimawonekera kumadera a chloride, timawonjezera 5% haidrojeni ku nayitrogeni kuti tikwaniritse kuchepetsa Cr₂O₃ popanda kusokoneza. Kulakwitsa chiŵerengero? Tawona kutayika kwa 0.3% mu mphamvu zokolola-ndipo tinakana 172 kg yazinthu mu gulu limodzi.
Chifukwa Chake Kusankha Kwanu Kumasintha Chilichonse-Kuposa Kuchulukana
Kuchulukana ndikofunikira - koma ndi gawo loyamba loyang'ana. Njira ya sintering imayang'anira kapangidwe ka tirigu, kugawa gawo, ndi kupsinjika kotsalira. Sintering wamba wa 17-4PH zosapanga dzimbiri zimatulutsa mbewu zolimba zomwe zimachepetsa kutopa kupirira mu ma valve opanikizika. HIP-refined microstructures imapereka mbewu zabwino kwambiri, zofananirako-kuwonjezera moyo wautumiki ndi 4.2 × m'mayesero akumunda. Mapeto a pamwamba amasinthanso: Zigawo za HIP zimafunikira 30% kuchepera komaliza kuti igunde Ra ≤0.4 µm pankhope zomata. Ulamuliro wa dimensional umasiyana kwambiri - sintering yachizolowezi imachepa 12-15% motsatira; HIP imachepera 0.8-1.3% yokha, kutilola kuti tigwire ± 0.02 mm panyumba za silinda za 280-mm-diameter popanda makina achiwiri. Ndipo mbiri matenthedwe zimakhudza machinability: T800 sintered mwachizolowezi makina pa 18 m/mphindi; T800 yothandizidwa ndi HIP imafuna 8 m/mphindi chakudya ndi ma carbide apadera. Timajambula zamalondawa panthawi yowunikira mainjiniya-osati titawunikiranso nkhani yoyamba.
Kumvetsetsa mitundu ya sintering mu ufa zitsulo fakitale ntchito zimalekanitsa ma prototypes ogwira ntchito ndi magawo ofunikira kwambiri opanga. Ku QINGDAO QIANGSENYUAN TECHNOLOGY CO., LTD., timagwirizanitsa njira yopangira zinthu ndi fizikisi yogwiritsira ntchito osati ma datasets okha. Ma hydraulic pressure valves amapeza HIP. Kuponyedwa kwachitsulo chokwera kwambiri kumapangitsa kuti hydrogen sintering. Cobalt alloy nozzles amafuna zero porosity kupeza SPS. Kusankha koyenera kumayamba ndi kulephera kwa gawo lanu-osati bajeti yanu. Timatsimikizira chisankho chilichonse motsutsana ndi kupsinjika kwenikweni kwapadziko lapansi, kuwonekera kwa dzimbiri, ndi kulolerana kwa misonkhano. Chifukwa m'mafakitale olondola, sintering si sitepe. Ndi maziko.
