Mukawona 'Inconel 718 ikupanga ndalama' pamtundu wina, nthawi zambiri imabwera ndi pepala lodziwika bwino lomwe limatchula mphamvu zolimba komanso kukana mpaka 1300 ° F. Chimene pepalalo silimatchula kawirikawiri ndi kuuma kwa alloy panthawi yomwe zipolopolo zimaphwanyidwa, kapena momwe kuganiziridwa pang'ono mu gating kungasinthe chigawo chovuta kwambiri cha turbine kukhala pepala lokwera mtengo kwambiri. Pali malingaliro olakwika omwe amadziwika kuti chifukwa ndi superalloy yomwe imagwiritsidwa ntchito kwambiri, njirayi ndiyofanana. Si. Mdierekezi ali mu kasamalidwe ka matenthedwe-amayang'anira kutentha osati panthawi yothira, koma kuyambira pomwe mukuyamba kupanga chipolopolo cha ceramic.
Masewera a Zipolopolo: Zoposa Ceramic Dip
Kuyambira ndi chitsanzo cha sera, ndondomekoyi ikuwoneka yolunjika. Koma ndi 718, mawonekedwe apamwamba kwambiri a gamma ndi gamma double prime zomwe zimapatsa zinthu zabwinozo zimapangitsanso kukhala vuto lalikulu pakudyetsa kuchepa kwamphamvu. Simungagwiritse ntchito mtengo womwewo womwe mungagwiritse ntchito 304 zosapanga dzimbiri. Ndinaphunzira izi movutirapo nditayamba ntchito yopangira makina opangira magetsi. Tidagwiritsa ntchito njira yolowera pamwamba, kusonkhana kokongola sera, chipolopolo changwiro. NDT idawulula netiweki ya microshrinkage m'matumba akulu akulu. Zinthuzo zinali zomveka, koma zosamveka zokwanira. Zomwe zidafuna kuti tiwunikenso ma radiographic, ndipo tidalephera. Nkhani sinali ya aloyi chemistry; chinali chakuti mtunda wathu wodyetsera unali wosakwanira kwa 718 zolimba zenizeni. Tinayenera kubwereranso, kuwonjezera zowonjezera zowonjezera, ndipo kwenikweni kuwonjezeka modulus m'magawo ena kuti alimbikitse kukhazikika kolunjika kwa odyetsa. Idawonjezera mtengo ndi nthawi yomwe mawu oyamba sanatchulidwe.
Ndiye pali chipolopolo chomwe. Makina omangira a zirconia/silica amatha kugwira ntchito, koma pazigawo zokhala ndi mipanda yopyapyala kapena zigawo zomwe zimafunikira kutsirizika kwapadera, tasinthira ku malaya amaso osakanikirana a silica. Kusagwirizana kwakukula kwamafuta ndikocheperako, kumachepetsa chiopsezo cha kung'ambika kotentha pamene 718 kuponyera kuzizira ndikulumikizana ndi chipolopolo cholimba. Ndikanthu kakang'ono, koma kulumpha kuyesa kuli ngati kuganiza kuti pulasitala yonse ndi yofanana pomanga nyumba. Mutha kupeza dongosolo, koma ming'alu idzafotokoza nkhaniyo.
Ndimakumbukira projekiti yomwe idapangidwa Qingdao Qiangsenyuan Technology (QSY). Iwo akhala ali mumasewera kwa zaka zambiri, ndipo njira yawo yopangira zipolopolo za ma aloyi a nickel ndi njira. Sizongozungulira kuzungulira koviika; ndi za ankalamulira kuyanika mapangidwe pakati pa odula aliyense kupewa chipolopolo warpage. Kwa 718, komwe chithandizo cha kutentha kwapambuyo pa kuponyera ndi chofunikira kwambiri kuti chiwongolere magawo olimbikitsawo, chipolopolo chosokonekera chikhoza kubweretsa kupsinjika kotsalira mu gawo la 'as-cast' lomwe ngakhale chithandizo chamankhwala chimavuta kuchikonza. Zolemba zawo nthawi zonse zimagogomezera kuwongolera chinyezi - mfundo yomwe nthawi zambiri imanyalanyazidwa koma yofunika kwambiri kuti pakhale bata.
Kutsanulira: Kumene Chiphunzitso Chimakumana ndi Zowona Zosungunuka
Kusungunula ndi kuthira Inconel 718 pansi pa vacuum ndi mchitidwe wokhazikika wowongolera makutidwe ndi okosijeni ndi kutayika kwa zinthu zosakhazikika. Koma 'pansi pa vacuum' si boma. Mulingo ndiwofunikira. Vacuum yochuluka kwambiri ikasungunuka imatha kupangitsa kuti chromium ikhale nthunzi. Mumakhala mkati mwa nickel ndi niobium, koma chromium yanu imadumphira, zomwe zimakhudza kukana kwa okosijeni. Timayendetsa vacuum yocheperako pang'ono pakusungunula koyambirira, kenako ndikuyikweza kuti tiyengedwe. Ndi kuvina, osati kutembenuza.
Kutentha kwa kuthirira ndi kuyitanira kwina kofunikira. Deta imanena kuti liquidus ndi pafupifupi 1330 ° C. Kuthira kotentha kwambiri kumabweretsa kukula kwakukulu kwa njere ndi chipolopolo choopsa, zomwe zimawononga pamwamba. Kuthira pang'ono kumayitanira mistuns, makamaka mumayendedwe ozizirira ovuta. Malo okoma nthawi zambiri amakhala 20-30 ° C zenera pamwamba pa liquidus, ndipo zimatengera gawo la geometry. Kwa thupi la valve yokhuthala, mutha kupita pamwamba kuti musinthe madzi. Kwa bulaketi yazamlengalenga yokhala ndi mipanda yopyapyala, mumatsika momwe mungayesere. Palibe yankho lachilengedwe chonse, ndichifukwa chake njira zoyendetsera ziyeneretso sizingakambirane.
Kuyesera kumodzi komwe kunalephera kukukhudza nyumba yopopera. Ma geometry anali ndi ma flanges okhuthala komanso ukonde wopyapyala wamkati. Tinatsanulira pa kutentha kogwirizana. Ma flanges anali abwino, koma maukonde amawonetsa kutsekeka kozizira. Kukonza sikunali kungosintha kutentha; tinayenera kukonzanso khomo kuti lipereke zitsulo zowotcha molunjika ku zigawo zoondazo kudzera mumayendedwe oyendetsedwa, opanda chipwirikiti. Zinawonjezera zovuta ku mtengo wa sera koma zinapulumutsa gawolo. Apa ndipamene zinachitikira foundry, monga nthawi yaitali kuponya ndalama yang'anani pa shopu ngati QSY, ikuwonetsa mtengo wake. Iwo ayenera kuti awona kusiyana zana kwa vutoli.
Zotsatira zake: Chithandizo cha Kutentha ndi Gawo la Kutaya
Kuganiza za chithandizo cha kutentha monga ntchito yosiyana, yotayika pambuyo pake ndi kulakwitsa ndi 718. Mapangidwe a as-cast amatanthauza mwachindunji zomwe kutentha kwa kutentha kungathe ndipo sikungathe kukwaniritsa. Chithandizo chodziwika bwino ndi njira yothetsera 980 ° C, ndikutsatiridwa ndi kukalamba kawiri. Koma ngati muli kwambiri dendritic tsankho mu kuponyedwa dongosolo (wamba mu ndalama kuponyera), njira mankhwala nthawi kungakhale kosakwanira kuti homogenize aloyi. Mumapeza kuuma koyenera mutatha kukalamba, koma kuuma kwamphamvu kumatha kukhala kosagwirizana.
Nthawi ina tinali ndi zigawo zingapo zomwe zidapambana mayeso onse amakina koma zidalephera msanga pantchito yogwedezeka kwambiri. Kusanthula kwa Metallurgical kunawonetsa madera a brittle Laves phase, eutectic yokhala ndi niobium yomwe imapanga panthawi yolimba ngati kuzizira sikuyendetsedwa. Njira yothetsera vutoli inali isanathe kwathunthu. Choyambitsa chake chinayambika ku kuzizira kwa kuponyedwa mkati mwa ng'anjo pambuyo pothira. Tinkazizira pansi pa vacuum, yomwe ndi insulator yabwino. Kuchedwetsa kuziziritsa mwa kudzaza mmbuyo ndi argon pambuyo pokhazikika kulimbitsa kunathandizira kuchepetsa kuopsa kwa tsankho, kupereka chithandizo cha kutentha chotsatira mwayi womenyana. Idawonjezera sitepe, koma idapangitsa kuti ntchitoyi ikhale yolimba.
Kuyanjana uku ndichifukwa chake masitolo omwe amapereka zophatikizika CNC makina ndi chithandizo cha kutentha, monga gawo la ntchito yawo monga QSY ndondomeko, ali ndi mwayi. Sangakwanitse kuchitira magawowa ngati ma silo. Katswiri wamakina akuyenera kudziwa ngati zinthuzo zizichita mosadukiza mbali zonse, ndipo zimatengera mbiri yakuponya ndi kutentha. Zimakakamiza kuwona kwathunthu kwazinthu zopanga.
Kuthekera: The Final Hurdle
Aliyense amalankhula za kuponyera 718, koma zokambiranazo nthawi zambiri zimasokoneza kukonza. Zinthu zakale zimadziwika kuti ndizovuta kwambiri ndipo zimawumitsa nthawi yomweyo. Ngati njira yanu yoponyera isiya zolimba, brittle inclusions kapena sikelo ya alumina pamwamba kuchokera ku chipolopolo, muwononga zida zodulira panthawi yoyamba yovuta. Ubwino wa as-cast surface ndi wofunika kwambiri. Dongosolo labwino la zipolopolo ndi kuthirira koyendetsedwa bwino kumachepetsa sikelo iyi, koma mankhwala ena apamtunda monga kuphulika kwa abrasive kapena mphero yamankhwala pang'onopang'ono angafunike chida choyamba chisanakhudze gawolo.
Kuphatikiza apo, kupsinjika kotsalira kuchokera pakuponya kumatha kukhala kofunikira. Ngati mukakamiza mbali yomwe ili yopanikizika muzitsulo ndikudula kwambiri, mumamasula nkhawayo, ndipo gawolo limayenda. Mutha kupirira pa opareshoni yoyamba, koma chachitatu, zonse ndizozimitsa. Kuzungulira koyenera kochepetsera kupsinjika pamaso pa makina akuluakulu aliwonse ndikofunikira. Nthawi zina, ndi bwino kuchita makina akhakula, ndiye mpumulo wina nkhawa, ndiye kumaliza Machining. Zikumveka zosagwira ntchito, koma ndizotsika mtengo kuposa kuponya kutayira komwe kwatsala pang'ono kumaliza chifukwa zidasokonekera panthawi yomaliza yotopetsa.
Apa ndipamene chitsanzo cha utumiki wathunthu chimatsimikizira kufunika kwake. Wogulitsa yemwe amasamalira kuponya ndalama mpaka kumakina omaliza, monga ntchito zomwe zawonetsedwa papulatifomu ya QSY, zimalimbikitsidwa kukhathamiritsa njira yonse yopangira kupanga. Anganene kuti awonjezere chilolezo cha makina munjira inayake kapena kusintha pang'ono utali wa fillet wosafunikira kwambiri kuti zithandizire kugwiritsa ntchito zida. Izi ndi zowona, zopulumutsa mtengo zomwe zimabwera chifukwa chogwira ntchito yonse, osati kuthira kokha.
Kutsiliza: Ndi Dongosolo, Osati Njira
Chifukwa chake, 'Inconel 718 investing casting' si njira imodzi yomwe mumayitanitsa kuchokera pamndandanda. Ndi dongosolo la zisankho zodalirana: chemistry ya zipolopolo, mapangidwe a gating, mbiri yamafuta panthawi yothira ndi kuzizira, magawo ochizira kutentha, ndi njira zamakina. Kukhathamiritsa pang'ono m'dera lina kumatha kuthetsedwa ndi kulakwitsa kwina. Mashopu omwe nthawi zonse amapereka magawo odalirika ndi omwe amamvetsetsa chilengedwechi. Samangotsanulira zitsulo mu nkhungu ya ceramic; Amayendetsa ulendo woyendetsedwa ndi kutentha ndi zitsulo kuchokera ku sera kupita ku gawo lomaliza. Deta ya data imakupatsani komwe mukupita, koma malo ogulitsira amakupatsirani njira yokhayo yopitirako.
Mukawunika ogulitsa, yang'anani kupyola pa mndandanda wa zida zawo. Funsani za machitidwe awo enieni a zipolopolo za ma aloyi a nickel apamwamba. Funsani za kayendedwe kawo ka kutentha kwa as-cast 718 ndi momwe akuyenerera. Funsani momwe amayendetsera kusintha kuchokera pakupanga kupita ku makina. Mayankhowo adzakuuzani zambiri za kuthekera kwawo kuposa kabuku kalikonse konyezimira. Kusiyana pakati pa kuponya kogwira ntchito ndi chigawo chapamwamba cha umphumphu kuli muzowonjezereka, zomwe zapindula movutikira.
