Kev soj ntsuam ntawm oxidation kuj thiab tensile lub zog ntawm TA9 titanium alloy
Kev tshuaj xyuas cov khoom antioxidant thiab cov yam ntxwv ntawm lub zog tensile
TA9 titanium alloy, nrog titanium thiab palladium raws li nws cov khoom tseem ceeb, yog cov khoom siv rau siab - kub thiab corrosive ib puag ncig vim nws superior oxidation kuj. Piv nrog rau cov pa titanium alloys, nws cov oxidation stability yog ho txhim kho, ua tau zoo tshwj xeeb tshaj yog nyob rau hauv heev corrosive scenarios xws li aerospace thiab marine engineering. Cov kev sim qhia tau hais tias tom qab lub sij hawm ntev - raug huab cua ntawm 500 degree, oxide zaj duab xis thickness ntawm no alloy tseem nyob rau hauv qab 5 micrometers, zoo thaiv cov pa diffusion thiab qhia tau hais tias nws zoo heev tsis kam mus rau siab - kub oxidation.
Lub caij no, TA9 titanium alloy nthuav tawm lub zog tensile zoo heev thiab tswj cov qauv kev ruaj ntseg txawm tias nyob rau hauv huab cua txias. Cov yam ntxwv no, ua ke nrog nws cov oxidation tsis kam, tsim kom muaj kev sib koom ua ke, ua rau nws muaj kev ntseeg siab rau cov khoom tseem ceeb hauv kev xav tau kev ua haujlwm.
1. Cov txheej txheem tseem ceeb ntawm kev ua haujlwm antioxidant
Lub oxidation tsis kam ntawm TA9 titanium alloy stems los ntawm nws cov ntsiab lus palladium tshwj xeeb. Palladium stabilizes oxide zaj duab xis qauv nyob rau hauv lub titanium matrix, txhawb lub denser TiO₂ zaj duab xis nyob rau saum npoo thiab zoo thaiv cov pa molecule nkag. Kev sim tau pom tias thaum cov ntsiab lus palladium tswj tau ntawm 0.15% thiab 0.2%, oxidation kuj ntawm TA9 alloy nyob rau hauv siab - qhov kub thiab txias ib puag ncig zoo dua li ntawm palladium - dawb titanium alloys. Ua kom cov ntsiab lus palladium ntxiv rau 0.3% ntxiv txhim kho oxide zaj duab xis stability, txhim kho lub sij hawm ntev oxidation los ntawm kwv yees li 20%. Cov yam ntxwv no, ua ke nrog kev ua tau zoo ntawm TA9 titanium alloy nyob rau hauv siab -kub thiab corrosive ib puag ncig (xws li aerospace thiab marine engineering applications), tsim kom muaj kev sib koom ua ke, ua rau nws yog cov khoom siv zoo tshaj plaws rau kev ua haujlwm hnyav.
2. Tensile lub zog thiab yoog mus rau qhov chaw huab cua
TA9 titanium alloy, ua tsaug rau nws qhov ntom ntom oxide zaj duab xis txheej txheem tsim los ntawm palladium (nws cov txheej txheem tiv thaiv - oxidation cov ntsiab lus saum toj no), qhia txog kev hloov pauv tau zoo hauv cov cheeb tsam nyuaj uas muaj qhov kub thiab txias, siab corrosion, thiab siab load. Nyob rau hauv cov xwm txheej hnyav xws li siab - qhov kub thiab txias ntawm aero- cav lossis sib sib zog nqus - cov khoom siv dej hiav txwv, nws lub zog tensile thiab oxidation kuj ua hauj lwm synergistically: ruaj khov tensile lub zog ntawm qhov kub siab (tseem kwv yees li 500 MPa txawm nyob rau ntawm 400℃) thiab cov ntaub ntawv ntom ntom oxide zaj duab xis ua ke ntawm cov khoom siv hauv ib puag ncig, tiv taus cov khoom siv hauv ib puag ncig. thaum lub sij hawm ntev - kev pabcuam. Qhov zoo dua ob qho no ua rau nws nyiam cov khoom siv rau cov khoom tseem ceeb hauv qhov chaw hnyav, xws li kub-kawg cov khoom siv dav hlau los yog sib sib zog nqus- cov cuab yeej tshawb nrhiav dej hiav txwv, qhov twg TA9 titanium alloy tuaj yeem ua tau raws li ob qhov kev xav tau ntawm kev siv lub zog thiab kev tiv thaiv corrosion.
3. Cov nyhuv ntawm kev kho cua sov ntawm lub zog tensile
Kev kho cua sov tsim nyog tuaj yeem txhim kho lub zog tensile thiab kub tsis kam ntawm TA9 titanium alloy. Cov kev tshawb fawb tau pom tias lub zog tensile ntawm TA9 alloy annealed ntawm 800℃tuaj yeem nce mus rau 720 MPa ntawm chav tsev kub, thiab nws cov tawv tawv kuj tseem txhim kho. Cov txheej txheem kev kho cua sov tsim nyog ua kom cov nplej loj ntawm cov khoom siv, yog li txhim kho lub zog tensile thiab oxidation tsis kam. Los ntawm kev sib piv cov ntaub ntawv sim los ntawm cov txheej txheem kev kho mob sib txawv, TA9 cov khoom kho nrog qis -kub annealing ua raws li kev laus ua pov thawj qhov zoo tshaj plaws sib npaug ntawm lub zog thiab tawv.
Hauv kev xaus
Lub superior oxidation kuj ntawm TA9 titanium alloy yog feem ntau ntaus nqi rau nws cov ntsiab lus palladium tshwj xeeb. Palladium stabilizes oxide zaj duab xis qauv nyob rau hauv lub titanium alloy matrix, ua rau ib tug denser TiO₂ zaj duab xis nyob rau saum npoo thiab zoo tiv thaiv ntxiv oxygen nkag mus. Cov kev sim qhia tau hais tias TA9 alloys nrog cov ntsiab lus palladium ntawm 0.15-0.2% pom zoo oxidation tsis kam ntawm qhov kub siab tshaj li titanium alloys yam tsis muaj palladium ntxiv. Cov ntaub ntawv qhia tias nce cov ntsiab lus palladium mus rau 0.3% ntxiv stabilizes oxide zaj duab xis qauv, txhim kho oxidation mus sij hawm ntev los ntawm kwv yees li 20%.
Qhov zoo ntawm daim ntawv thov
Due to the introduction of palladium, TA9 titanium alloy forms a dense oxide film and possesses excellent tensile strength (650-700 MPa at room temperature and approximately 500 MPa at 400℃), making it an ideal material for harsh environments such as aerospace and marine engineering. Nws cov khoom ruaj khov yog tshwj xeeb tshaj yog haum rau cov kev pab cuam mus sij hawm ntev nyob rau hauv kev sib xyaw ua ke ntawm qhov kub thiab txias, muaj zog corrosion, thiab siab load.
