{{01. Puas yog npib tsib xee tib yam li stainless hlau?
Npib tsib: ib qho hlau ntshiab (keeb ni, atomic tooj 28) paub txog corrosion tsis kam, thiab siab} nws feem ntau siv ua ib qho kev sib cais {}}
Stainless hlau: ib qho hlau-based alloy muaj ntau dua los yog sib npaug ntawm cov kab mob oxide muaj ntau dua li no, 30}}} pa} Lub hauv paus.
{{0 {}} Dab tsi yog cov hauv pausmamely ntawm superalloys?
Cov Khoom Tseem Ceeb:
Kuj kub siab rau high-kub nkag, oxidation, corrosion, thiab qaug zog.
Muaj peev xwm tswj lub zog mus txog li 70-90% ntawm lawv cov lus melting .
Cov Hlau Hlau:
Npib tsib xee: raws li feem ntau rau aerospace (e .}
Cobalt-Raws li: Siv hauv kev hnav siab, cov kev siv kub siab (e {{} g {4 {{.
Hlau-based: Txwv rau qis-kub siv (e .} pa turn kuj .
Ntxiv dag zog rau cov txheej txheem:
Cov Khoom Siv Hluav Taws Xob Zog ntawm cov khoom siv: cov ntsiab lus xws li Mo, W, lossis Cab Caws hauv Matrix .
Nag lossis daus (Al) (Al)
Discersion zuj zus zog: ruaj khov rau oxides (e {{{} g}}}, tho hauv 792).
Lis Kev Tswj Xyuas: Cov nplej zom cov nplej zom hauv ib leeg-siv lead ua alloys .
3. Cov qib tsib caug xyoo siab yog dab tsi?
Inconel 718: ~ 52% ni, siv nyob rau hauv Aerospace Turbine Discs.
Hastelloy c-22}: ~ 62% ni, zoo tagnrho rau ib puag ncig tuag taus (e}}} dej) {}}
Monel 400: ~ 67% ni, tiv taus hydrofluoric acid thiab marine corrosion.
Invar 36: ~ 36% ni (ib qho kev nthuav dav tsawg, txawm yog qhov tseem ceeb rau nws cov khoom).
Cov qib siab uas muaj kev sib txawv nrog cov khoom lag luam qis (e {}}
{{0 {}} Dab tsi yog qhov theem ntawm Nickel superalloy?
Matrix Theem (): Austenitic npib tsib xee khov kho cov tshuaj, duterile thiab ruaj khov ntawm chav tsev kub .
Ntxiv dag zog txhawb hluav taws:
'(Ni₃ (Al, TI): Lub ntsej muag ntsej muag sau lo lus (FCC) precipitates, e {}}}}} {{.
'' (Ni₃nb): Orthorhombic precipitates hauv alloys zoo li Inconel 718, pab txhawb rau lub hnub nyoog ua kom tawv nqaij tawv .
Carbides: {{.}}}}}}}} prec), uas yog nyob ntawm cov ciaj ciam los txhim kho creep Kuj .
Theem nrab theem:
Sigma (σ) theem: brittle intermetallic (e {.} g}, FECR) uas tuaj yeem tsim thaum muaj kev kub ntxhov, txo qhov ductility .
Laves Theem: Nws yog xim hlau sib xyaw (E {{{{{} g}}}}}}}}
5. Qhov sov yog dab tsi yog kev kho cua sov ntawm Nickel superalloys?
Kho annealing:
Txheej Txheem: cua sov saum toj no 'solvus kub (e {{}}} kub}}
Lub Hom Phiaj: Xiav cov neeg ua ntej, homogenize tus qauv, thiab txhim kho kev ductility rau kev ua lossis vuam .
Hnub nyoog tawv (nag lossis daus tawv tawv):
Txheej Txheem: Cua sov rau 650-950 Qib rau Ob peb teev, Txhawb '/' 'nag lossis daus.
Piv txwv li: Inconel 718 yog hnub nyoog ntawm 720℃rau 8 teev (ntxiv rau cov kauj ruam qis dua) kom ua kom tiav qis tensile (~ 1,240 mpa).
Hais txog kev nyuaj siab:
Txheej Txheem: cua sov txog 480-650 degree, qeeb txias, kom txo cov kev ntxhov siab ntawm machining lossis vuam .
Directional solidification (rau cam alloys):
Siv rau ib qho-siv lead ua alloys (e .} {}, Cms}, CMS}, CMS}, CMS}, CMS}
Kub iostatic nias (hip):
Siv kev kub siab thiab kub (e {.}} {}}) kom ci ntsa iab dis aus,Kaw micro-poro acosities thiab txhim kho lub neej qaug zog .
