Anthu akamva 'zigawo zoponya za cobalt alloy casting', mayanjano omwe amakhalapo nthawi zambiri amakhala 'high-performance', 'aerospace', kapena 'medical implants'. Izi sizolakwika, koma ndikumvetsetsa kwapamwamba komwe kumayang'ana zenizeni zenizeni zopanga zigawozi. Vuto lenileni siliri mu pepala la aloyi yokha; ndikuyang'anira kusintha kuchokera ku chithaphwi chosungunuka chachitsulo kupita ku gawo lokhazikika, lopanda chilema lomwe lingathe kukhala ndi turbine kapena thupi la munthu. Ambiri amaganiza kuti ngati mutha kuponya chitsulo, mutha kuponya ma aloyi a cobalt. Lingaliro limenelo lawononga ndalama zambiri kuposa masitolo angapo.
Aloyi Si Njira Yokha, Ndi Makhalidwe
Kugwira ntchito ndi cobalt-chromium alloys, monga magiredi wamba a CoCrMo, ndi phunziro la kudzichepetsa. Mukuthana ndi zinthu zomwe zili ndi malo osungunuka kwambiri komanso chizolowezi choyipa chopanga ma oxide okhazikika. The cobalt aloyi kuponya ndondomeko, makamaka kuponya ndalama zomwe timagwiritsa ntchito kwambiri, zimakhala kuyenda kwa chingwe pakati pa kutentha, kutentha kwa nkhungu, ndi kuthamanga kwachangu. Madigiri ochepa pa nkhungu preheat, ndipo inu kupeza mistruns. Kuchedwetsa kwambiri kutsanulira, ndipo mumakhala ozizira. Mofulumira kwambiri, ndipo mumatchera gasi kapena kuwononga chipolopolo cha ceramic. Si njira yomwe mumatsatira; ndi momwe mumayesera kuyembekezera ndikuwongolera.
Ndimakumbukira gulu la gawo la makina osindikizira gasi zaka zingapo zapitazo. Chemistry inali yangwiro, mtengo wachitsulo wa sera unali wopanda chilema. Koma ife tinali ndi mnyamata watsopano pa ng'anjo tsiku limenelo. Anatsatira ndondomeko yoyenera ya superalloy yochokera ku nickel yomwe timayendetsanso. Chotsatira? Chitsulo cha 'pancaked' mu nkhungu - chinataya madzi ake mofulumira kwambiri. Ziwalozo zimawoneka bwino m'maso, koma X-ray idawonetsa kutsika kwamkati m'magawo okhuthala. Kutentha konse kunathetsedwa. Limenelo linali tsiku lomwe timuyi idazindikira kuti ma alloys a cobalt samakhululukira. Kukhazikika kwawo kosiyanasiyana ndi matenthedwe matenthedwe ndi zilombo zapadera. Simungagwiritse ntchito generic kuponyera malamulo.
Apa ndipamene zochitika zanthawi yayitali, monga zaka 30+ pashopu ngati QSY, zimakhala zowoneka. Sikuti kukhala ndi chinyengo chamatsenga; ndi za kukhala ndi laibulale yakuya, pafupifupi mwachilengedwe chazoyambitsa-ndi-zotsatira zamitundu yosiyanasiyana. Mumaphunzira kuti kagawo kakang'ono kakang'ono ka ma valve kumafunikira njira yosiyana kwambiri yolowera ndi kukwera poyerekeza ndi mbale yovala yokulirapo, ngakhale itakhala yofanana ndi aloyi. Chidziwitso chiri mu uinjiniya wapatani kale chitsulo chisanasungunuke.
Kuponyera Mould Shell: Kulondola ndi Khungu La Ceramic
Kwa zovuta, umphumphu wapamwamba zigawo za cobalt alloy, kupanga nkhungu za zipolopolo—mtundu wa kuyika ndalama—kaŵirikaŵiri ndiyo njira yokhayo yotheka. Kumapeto kwa pamwamba ndi kulondola kwake sikungafanane ndi kuponya mchenga. Koma chipolopolo cha ceramic palokha ndikusintha kofunikira. Ma alloys a Cobalt ndi othandiza. Ngati chomangira chipolopolocho kapena chotchinga chili ndi zonyansa zilizonse zomwe zingachepetse mphamvu ya okosijeni wapafupi ndi kutentha kwakukulu, mumapeza chodabwitsa chotchedwa 'metal-mold reaction'. Zimapanga malo olimba, osasunthika, omwe nthawi zambiri amakhala oipitsidwa ndi kuponyedwa komwe kumakhala koopsa kuti makina azimitsidwa ndipo amatha kubisa ming'alu.
Tinakhala miyezi yambiri tikuyimba mu chipolopolo chathu cha ntchito yochokera ku cobalt. Ndiwosakanikirana, koma mfundo yake ikugwiritsa ntchito alumina yoyera kwambiri ndi zirconia refractories yokhala ndi makina omangira opanda silica. Kuwumitsa ndi kuomberako kumakhala koopsa kwambiri—kumayenda pang’onopang’ono mpaka kutentha kwambiri n’kumawotcha zinthu za m’chilengedwe ndi kuika chipolopolocho m’chidebe cholimba chozizirirapo. Kuwombera kothamanga kumabweretsa chipolopolo chofooka chomwe chimatha kusweka panthawi yothira kapena, choyipa, kupanga ming'alu yaying'ono yomwe imalola chitsulo kulowa, kuwononga pamwamba. Ndawonapo mbali zina zikutuluka zikuwoneka ngati zili ndi ndevu za ceramic. Ndizo zonse rework, kapena zidutswa.
Kugwirizana ndi khungu la khungu ndikofunikira. Ku QSY, kuponyera ndi makina ali pansi pa denga limodzi, zomwe zimathandiza. Okonza makina omwe pambuyo pake amadula zinthu zolimbazi amadandaula nthawi yomweyo ngati chipolopolocho chazimitsidwa, chifukwa moyo wawo wa zida umatsika akagunda gawo lokhazikika. Ndemanga zamkati zamkati ndizofunika kwambiri. Zimakakamiza mbali yoyambira kukhala ndi vuto kuyambira koyambira mpaka kumapeto, osati mpaka gawolo litagwedezeka kuchokera mumchenga.
Kumene CNC Machining Akulowa Pamacheza
Ayi cobalt aloyi kuponya gawo ndi 'net-shape'. Nthawi zonse mumafunikira makina, ndipo apa ndi pamene mphira umakumana ndi msewu. Cobalt alloys ndizovuta kwambiri kupanga makina. Amagwira ntchito molimbika kwambiri, amakhala abrasive, ndipo amakhalabe ndi mphamvu pa kutentha kwakukulu. Gawo losapangidwa bwino litha kukhala ndi zopsinjika zotsalira kapena ming'alu yaying'ono yomwe ingayambitse kulephera msanga pantchito. Ichi ndichifukwa chake ntchito yophatikizidwa ndi yofunika kwambiri.
Gawo la as-cast lili ndi sikelo, dongosolo la zipata, ndi zinthu zowonjezera ('stock'). Chinthu choyamba nthawi zambiri ndicho kuchotsa zipata ndi gudumu loduka lotuwa—zonsezi zikuuluka paliponse. Kenako imapita ku mphero ya CNC kapena lathe. Kusankha zida ndizo zonse. Mufunika zida zolimba, magiredi apamwamba a carbide, nthawi zina ngakhale zoyika za ceramic kapena CBN kuti mumalize. Kuthamanga kozizira ndi voliyumu sikungakambirane; muyenera kusefukira chodulidwa kuti muchepetse kutentha ndikutsuka tchipisi. Chip chomwe chimacheka nthawi yomweyo chimawononga choyikapo.
Tidapanga mipando ingapo ya aloyi yokhala ndi cobalt ya mavavu ogwira ntchito kwambiri. Kulekerera pa malo osindikizira kunali mu ma microns. Chovuta chinali chakuti kuponyedwa, pambuyo pa chithandizo cha kutentha, kunali ndi kupotoza pang'ono, kosayembekezereka. Okonza mapulogalamu athu a CNC adayenera kupanga njira zowunikira kuti 'apange mapu' a geometry yeniyeni ya gawolo pomaliza kumaliza komaliza. Zinawonjezera nthawi, koma inali njira yokhayo yotsimikizira chisindikizocho. Makina osinthika amtunduwu sali m'buku; zimabadwa kuchokera pakuchotsa zinthu zingapo zodula ndikuzindikira chifukwa chake.
Chithandizo cha Kutentha: The Silent Game-Changer
Ichi chikhoza kukhala chomwe chimanyalanyazidwa kwambiri. Makhalidwe a cobalt alloy casting amapangidwa mu ng'anjo yotentha, osati ng'anjo yoponya. Kuchiza, kukalamba - izi zimatanthauzira microstructure yomaliza, kugawa kwa carbide, ndi makina. Pezani zolakwika, ndipo muli ndi gawo ndi chemistry yoyenera yomwe imagwira ntchito ngati zopanda pake.
Vuto ndi kusasinthasintha. Gawo lalikulu, lokhuthala ndi laling'ono, lopyapyala kuchokera ku kutentha komweko silingathe kuwona mawonekedwe a nthawi yotentha. Pakatikati pa gawo lokhuthala mwina sangafike kutentha, kusiya magawo osayenera. Tinaphunzira izi movutikira ndi ma prototypes opangira opaleshoni. Mphamvu zolimba komanso moyo wotopa zinali zosagwirizana pang'onopang'ono. Choyambitsa chinali kufanana kwa kutentha kwa ng'anjoyo komanso momwe timayikamo. Tidayenera kuyika ndalama mu ng'anjo zolondola zokhala ndi zone zingapo komanso malamulo okhwima owongolera katundu. Tsopano, pazinthu zofunika kwambiri, timagwiritsa ntchito ma thermocouples ophatikizidwa m'magawo ansembe mkati mwa katundu kuti titsimikizire mbiri yamafuta.
Ndi sitepe yokwera mtengo, koma ndi yomwe imalekanitsa kuponya kwazinthu kuchokera ku gawo lodalirika kwambiri. Simungathe kuyang'ana microstructure mu gawo; muyenera kuzikonza mkati. Mphamvu yakumbuyoyi ndi yomwe imapangitsa kuti wothandizira ngati QSY akhale wodalirika pa ntchito zachipatala ndi zamlengalenga, kumene mapepala (chithunzi cha kutentha kwa kutentha) ndi chofunikira monga gawo lomwelo.
Muyeso Weniweni: Kusanthula Kulephera ndi Kubwerezabwereza
Mayeso enieni a ukatswiri mu cobalt aloyi kuponyera zigawo si nkhani yoyamba yangwiro. Ndi momwe mumachitira ndi omwe akulephera. Tinali ndi chigawo cha pampu ya mankhwala yomwe inalephera kutopa pambuyo pa maola mazana angapo. Wogulayo anali, momveka, wokhumudwa. The post-mortem inaphatikizapo kugawa gawolo, kuchita kafukufuku wa SEM/EDS pamtunda wosweka. Tinapeza gulu la zinthu zopanda zitsulo - mwinamwake chidutswa cha ceramic chosweka kuchokera ku chipolopolo kapena tinthu ta slag - chomwe chinali ngati malo oyambitsa ming'alu.
Izi zidapangitsa kuwunikiranso kwathunthu: kukonza kusefera kwathu kwachitsulo panthawi yothira (tinasinthira ku sefa ya thovu la ceramic mumayendedwe olowera), kuyang'anitsitsa zipolopolo za ceramic musanayambe kusonkhana, ndikukhazikitsa pafupipafupi slag skimming pakusungunuka. 'Kukonza' sikunali kuchita kamodzi; kunali kukhwimitsa kwadongosolo kwa zowongolera. Gulu lotsatira lidayenda popanda vuto. Kulephera kumeneko, ngakhale kunali kowawa, mwina kunathandiza kwambiri kukonza njira yathu kuposa maulendo khumi ndi awiri opambana.
Iyi ndi mbali yosasangalatsa. Sizokhudza kugulitsa sizzle ya 'aerospace-grade'. Ndi za kukhala ndi labu metallurgical, machitidwe khalidwe, ndi chikhalidwe kusokoneza ntchito yanu, kupeza gwero, ndi kusintha mmene ntchito. Ndizo zaka 30 zakuchitikira kulankhula. Ndiko kudzikundikira kwa zowongolera zazing'onozi, zopambana movutikira zomwe zimamanga njira yodalirika yopangira chinthu chovuta ngati cobalt-based alloy kuponyera. Pamapeto pake, gawolo limakhala labwino kwambiri ngati ulalo wofooka kwambiri mu unyolo wautali kwambiri, kuchokera ku chitsanzo cha sera mpaka kuwunika komaliza.
