Kev siv cov titanium alloy hauv aero-engine
Lub cav yog lub plawv ntawm lub dav hlau. Tig qhov chaw xws li lub cav kiv cua, lub zog siab compressor disk thiab cov hniav tsis yog tsuas yog yuav tsum tau tiv taus kev ntxhov siab, tab sis kuj yuav tsum muaj qee qhov kev kub ntxhov. Cov kev ua haujlwm zoo li no kub dhau rau txhuas thiab tuab heev rau cov hlau. Titanium yog qhov kev xaiv zoo tshaj plaws. Titanium muaj qhov kub thiab txias tsis kam, nkag siab thiab oxidation tsis kam ntawm qhov kub ntawm 300 ~ 650 degree. Nyob rau tib lub sijhawm, qhov tseem ceeb ntawm kev ua tau zoo ntawm lub cav yog qhov sib zog-rau-qhov hnyav, uas yog qhov sib piv ntawm lub zog tsim los ntawm lub cav rau nws qhov loj. Lub cav thaum ntxov muaj qhov sib piv-rau-qhov hnyav ntawm 2: 3, tab sis tam sim no nws tuaj yeem ncav cuag 10. Qhov siab dua qhov kev sib tw-rau-qhov hnyav, qhov zoo ntawm lub cav ua haujlwm. Siv titanium alloy es tsis txhob ntawm cov thawj npib tsib xee-raws li high-temperature alloy yuav txo tau qhov loj ntawm lub cav thiab zoo heev txhim kho lub thrust-rau-hnyav piv ntawm lub aircraft engine. Titanium yog nce siv nyob rau hauv aircraft engine. Nyob rau hauv advanced txawv teb chaws aerospace xyaw, tus nqi ntawm high-temperature titanium alloy account rau 25% mus rau 40% ntawm tag nrho cov cav loj. Piv txwv li, titanium alloy cov ntsiab lus ntawm lub thib peb-tiam engine F100 yog 25%, thiab titanium alloy ntsiab lus ntawm lub thib plaub tiam engine F119 yog 40%.
Aero-engine Cheebtsam xav tau cov titanium alloys kom muaj lub zog zoo tam sim no, tiv thaiv tshav kub, lub zog ntev, kev kub ntxhov siab, thiab kev ruaj ntseg ntawm chav tsev kub mus rau qhov kub siab dua. Txawm hais tias -type thiab ze ntawm - - hom titanium alloys muaj lub zog tensile siab los ntawm chav tsev kub txog li 300 degree, qhov nkag tsis kam thiab kub-resistant stability ntawm cov alloys txo qis ntawm qhov kub siab dua, yog li -type titanium alloys tsis tshua muaj siv. siv. Siv nyob rau hauv aircraft engine. Alpha-type thiab ze ntawm - - hom titanium alloys muaj cov khoom nkag tau zoo, ua haujlwm ntev thiab weldability, thiab tsim nyog siv rau hauv qhov chaw kub kub.
titanium alloy tsis tsuas yog muaj cov khoom kub ua haujlwm zoo, tab sis kuj muaj cov khoom zoo hauv nruab nrab thiab kub kub. Yog li ntawd, -type, ze - -hom thiab - - hom titanium alloys yog dav siv nyob rau hauv aerospace cav.
Tam sim no, lub siab tshaj plaws kev khiav hauj lwm kub ntawm high-temperature titanium alloys siv nyob rau hauv aerospace xyaw tau nce los ntawm 350 degree mus rau 600 degree, uas muaj peev xwm ua tau raws li cov khoom xav tau ntawm advanced engines. Tom qab ib nrab xyoo ntawm kev siv zog los ntawm titanium alloy soj ntsuam thoob ntiaj teb, Ti811 (Ti-8Al-1Mo-1V), Ti-6Al-2Zr -1Mo-1V, Ti-2.25Al-11Sn-5Zr-1Mo-0.25Si, Ti{{ 18}}.25Al-11Sn-5Zr, Ti-6Al-1.5Cr-2.5Mo-0.5Fe{{29} }.3Si, Ti-5Al-4Mo-4Cr-2Sn-2Zr, Ti-6Al-2Sn{ {38}}Zr-6Mo, Ti-6.2Al- 2.8Mo-2Nb-2Sn-2.1Zr{{48} }.3Cr, Ti-6Al-2.75Sn-4Zr-4Mo-0.45Si, Ti-5.8Al{{59} }Sn -3.5 Zr-0.7Nb-0.5Mo-0.35Si-0.06C), thiab lwm yam alloy.
Ti811 (Ti-8Al-1Mo-1V) alloy muaj qhov zoo ntawm qhov ntom ntom, siab elastic modulus, zoo heev kev co damping kev ua tau zoo, zoo thermal stability, zoo vuam kev ua tau zoo, thiab zoo formability . Nws qhov tshwj xeeb nruj yog qhov siab tshaj plaws ntawm txhua qhov kev lag luam titanium alloys. ntawm. Zhao Yongqing et al. Peb tau ua qhov kev tshawb fawb tob txog kev ruaj ntseg thermal thiab kev kub ntxhov siab ntawm Ti811 alloy, thiab kawm txog kev cuam tshuam ntawm microstructure thiab cov qauv saum npoo ntawm lub xeev ntawm thermal stability kev ua tau zoo ntawm Ti811 alloy. Cov txiaj ntsig tau pom tias Ti811 alloy nrog equiaxed qauv thiab dual-xeev qauv muaj thermal stability zoo; Lub hav zoov ntawm rab koob zoo li qauv txo cov thermal stability ntawm Ti811 alloy. Tsis tas li ntawd, cov kev tshawb fawb tau pom tias thaum Ti811 alloy yog rhuab ntawm 425 degree, lub nto oxide txheej thiab lub sij hawm raug tsis muaj kev cuam tshuam rau thermal stability ntawm lub alloy.
Ntawm qhov kub thiab txias ntawm 350 degree thiab 500 degree, fretting qaug zog rhiab heev ntawm Ti811 alloy nce nrog nce kub. Creep yog qhov tseem ceeb cuam tshuam rau FF tsis ua haujlwm ntawm Ti811 alloy ntawm qhov kub thiab txias. Cov kev hloov pauv hauv kev hloov pauv amplitude cuam tshuam rau qaug zog. Lub luag haujlwm thiab cov txheej txheem ntawm kev ntxhov siab thiab hnav thaum lub sijhawm FF txheej txheem.
Tam sim no cov tswv yim kub-resistant titanium alloys yog Ti1100 thiab IMI834, uas tau siv nyob rau hauv EJ2000 thiab 55-712 hloov cav feem. Vim qhov tshwm sim ntawm "titanium hluav taws" xwm txheej, nplaim hluav taws-retardant titanium alloys tau nyiam ntau thiab ntau dua. Tebchaws Asmeskas, Russia thiab lwm lub tebchaws tau tsim cov titanium alloys tshiab nrog cov nplaim hluav taws zoo. Alloy C yog cov nplaim hluav taws kub-retardant titanium alloy tsim los ntawm Pratt & Whitney hauv Tebchaws Meskas. Nws tau raug siv los ua vector nozzle tivthaiv rau lub cav F119. Cov nominal muaj pes tsawg leeg ntawm cov hlau yog Ti-35V-15Cr (cov feem ntau, %), thiab cov hlau muaj ib tug loj npaum li cas ntawm kim hlau vanadium. , ua ke nrog qhov tseeb tias cov txheej txheem kub deformation ntawm Alloy-C alloy ingots yuav tsum tau siv qee cov khoom siv tshwj xeeb, ntxiv rau cov khoom siv ntxiv. Russia tau tshawb fawb txog cov nqi qis Ti-Cu alloys thiab tshaj tawm BT25 thiab BT36 alloys. Suav cov kws tshawb fawb tshawb fawb tau ua cov ntsiab lus tseem ceeb thiab kev ntsuas cuam tshuam ntawm kev tshawb fawb thaum ntxov ntawm titanium alloys rau cov cav.
