
Cobalt-based superalloys yog ib chav kawm ntawm cov khoom siv hlau ua tau zoo tsim los tswj cov khoom siv tshwj xeeb, kev ruaj ntseg ntawm qhov chaw, thiab kev tiv thaiv corrosion ntawm qhov kub siab heev, feem ntau tshaj qhov uas cov nickel-based superalloys pib qaug zog. Lawv yog cov khoom siv tseem ceeb rau cov khoom tseem ceeb hauv cov cheeb tsam uas xav tau tshaj plaws, tshwj xeeb tshaj yog nyob rau hauv aerospace, industrial gas turbines, thiab kev kho mob cog.
Lawv qhov kev ua tau zoo tshaj plaws yog los ntawm kev muaj zog cobalt-chromium matrix thiab cov ntim siab ntawm cov tawv tawv, refractory carbide hais.
Exceptional High-Temperature Strength: Cobalt alloys pom cov ntsiab lus melting siab dua thiab zoo dua kub hardness thiab creep tsis kam tshaj nickel alloys ntawm qhov kub siab tshaj 1000 ° C (1832 ° F). Qhov no txhais tau tias lawv tiv taus softening thiab deformation nyob rau hauv kev ntxhov siab nyob ze-melting-point kub.
Zoo hnav & Galling Resistance: Lawv qhov hardness, feem ntau txhim kho los ntawm lub network ntawm hard carbides, muab kev tiv thaiv zoo heev rau kev hnav, nplaum hnav (galling), thiab fretting. Qhov no ua rau lawv zoo tagnrho rau kev hnav-ntsej muag daim ntaub ntawv.
Cov Khoom Kub Kub Zoo Tshaj Plaws & Oxidation Resistance: Cov ntsiab lus siab chromium (feem ntau tshaj 20%) tsim cov kev tiv thaiv, adherent chromium oxide (Cr₂O₃) nplai uas tiv thaiv degradation hauv oxidizing thiab sulfidizing cua.
Superior Thermal Fatigue Resistance: Lawv tuaj yeem tiv taus ntau zaus ntawm cua sov thiab txias yam tsis muaj kev tawg, ib qho tseem ceeb rau cov khoom xws li turbine vanes.
Kev ua tau zoo ntawm cobalt superalloys yog muab los ntawm ntau lub tswv yim tseem ceeb:
Solid-Solution Strengthening: Cov ntsiab lus zoo li tungsten (W) thiab molybdenum (Mo) yaj nyob rau hauv cobalt matrix, impeding dislocation txav.
Carbide Precipitation: Kev tsim cov carbide nyuaj (piv txwv li, Cr₇C₃, Cr₂₃C₆, WC, TaC) thoob plaws hauv microstructure muab kev tiv thaiv zoo heev rau kev nkag thiab hnav. Qhov loj, hom, thiab kev faib tawm ntawm cov carbides yog qhov tseem ceeb rau kev ua haujlwm.
Lub Cobalt Allotropy: Cobalt tau dhau los ua ib theem kev hloov pauv thaum cua sov, thiab cov yam ntxwv no yog siv los txhim kho cov khoom los ntawm kev kho cua sov thiab kev ua haujlwm thermo-mechanical.
Cobalt-based superalloys yog qhov tseem ceeb hauv cov ntawv thov uas tsis ua haujlwm tsis yog qhov kev xaiv.
Aerospace & Power Generation Turbines: Siv rau cov khoom nyob ruaj ruaj xws li:
Turbine Vanes & Nozzle Guide Vanes: Qhov twg cov roj kub siab tshaj plaws tau ntsib thiab nkag siab yog qhov tseem ceeb.
Industrial Wear Cheebtsam: Lub hauv paus rau Stellite ™ alloys, siv rau:
Lub rooj zaum & Trim nyob rau hauv high-pressure, high-temperature li qub.
Hardfacing Wires & Rods rau lub tsho tiv no tseem ceeb ntawm cov khoom siv thiab tshuab.
Twj Tes Tsho, Ncej, thiab Txiav Riam.
Kev cog hniav kho mob: Siv rau hauv orthopedic implants (tshwj xeeb tshaj yog rau cov hlau-on-hlau bearing nto) vim lawv zoo heev biocompatibility, hnav tsis kam, thiab corrosion kuj nyob rau hauv tib neeg lub cev.
Cov lus hauv qab no qhia txog cov yam ntxwv tseem ceeb rau kev saib xyuas sai:
| Feature | Kev piav qhia | Qhov zoo |
| Base Element | Cobalt (Co), nrog cov ntsiab lus siab Chromium (Cr). | Muab lub hauv paus matrix rau high-temperature kev ua tau zoo thiab corrosion kuj. |
| Key Strengtheners | Tungsten (W), Molybdenum (Mo), thiab Carbon (C) rau kev tsim carbide. | Imparts high-temperature zog, creep resistance, thiab hnav tsis kam. |
| Ua haujlwm kub | Siab heev, zoo tshaj 1000 ° C (1832 ° F). | Ua kom muaj kev ua tau zoo ntawm lub cav ntau dua thiab kev ua haujlwm hauv qhov chaw huab cua. |
| Cov khoom tseem ceeb | Kub Hardness, Creep Resistance, Hnav & Corrosion Resistance. | Kev sib xyaw tshwj xeeb rau cov kev pabcuam hnyav tshaj plaws. |
| Cov Hom Phiaj | Casting Cheebtsam, wrought bar / phaj, hmoov rau HIP, hardfacing alloys. | Versatile manufacturing rau ob qho tib si complex ze-net-puab qhov chaw thiab tiv thaiv txheej. |
| Primary Industries | Aerospace, Fais Fab Tsim, Kev Kho Mob, Tshuaj & Petrochemical. | Cov khoom ntawm kev xaiv qhov twg huab cua kub thiab hnav converge. |
Hauv cov ntsiab lus, Cobalt-raws li Superalloys yog niche tab sis tseem ceeb cov ntaub ntawv uas thawb ciam teb ntawm high-temperature engineering. Thaum feem ntau kim thiab denser tshaj npib tsib xee superalloys, lawv qhov kev ua tau zoo tsis sib xws hauv cov chaw tshwj xeeb - tshwj xeeb tshaj yog lub zog kub kub, thermal qaug zog, thiab hnav tsis kam - ruaj ntseg lawv lub luag haujlwm tseem ceeb hauv kev siv tshuab siab heev.