Titanium Alloy Mechanical Properties
Kev siv qhov kub thiab txias yog ob peb puas degrees siab dua aluminium alloy, nyob rau hauv nruab nrab qhov kub thiab txias tseem tuaj yeem tswj tau qhov yuav tsum tau muaj zog, tuaj yeem ua 450 ~ 500 ℃ kub rau lub sijhawm ntev ua haujlwm ob lub titanium alloy nyob rau hauv thaj tsam ntawm 150 ℃ ~ 500 ℃ tseem muaj lub zog tshwj xeeb heev, thiab aluminium alloy ntawm 150 ℃ lub zog tshwj xeeb txo qis. Kev ua haujlwm kub ntawm titanium alloy tuaj yeem ncav cuag 500 ℃, thiab aluminium alloy yog qis dua 200 ℃. Zoo folding corrosion kuj.
Kev tiv thaiv corrosion ntawm titanium alloy yog zoo dua li ntawm cov hlau tsis muaj steel thaum nws ua haujlwm hauv cov huab cua noo thiab dej hiav txwv nruab nrab. Tshwj xeeb tshaj yog muaj zog tiv thaiv pitting corrosion, acid corrosion thiab kev nyuaj siab corrosion; Nws muaj kev tiv thaiv corrosion zoo heev rau alkali, chloride, chlorinated organic khoom, nitric acid, sulfuric acid, thiab lwm yam. Txawm li cas los xij, titanium tsis zoo corrosion kuj rau reductive oxygen thiab chromium ntsev media.
Titanium alloy muaj peev xwm tswj tau nws cov khoom siv kho tshuab ntawm qhov kub thiab txias. Titanium alloys nrog kev ua haujlwm kub tsis zoo thiab cov ntsiab lus qis qis, xws li TA7, tuaj yeem tswj tau qee yam yas ntawm -253 ℃. Yog li ntawd, titanium alloy kuj yog ib qho tseem ceeb uas tsis muaj qhov kub thiab txias cov khoom siv. Cov khoom siv tshuaj lom neeg ntawm titanium yog siab, thiab cov cua hauv O, N, H, CO, CO₂, dej vapor, ammonia thiab lwm yam tshuaj muaj zog. Thaum cov ntsiab lus carbon ntau dua 0.2%, nws yuav tsim TiC nyuaj hauv titanium alloy;
Thaum kub siab dua, kev cuam tshuam nrog N tseem yuav tsim TiN tawv; Tshaj 600 ℃, titanium absorbs oxygen los tsim cov txheej txheem hardening; Cov txheej embrittlement tseem yuav tsim thaum cov ntsiab lus hydrogen nce. Qhov tob ntawm cov tawv tawv tawv uas ua los ntawm kev nqus cov pa tuaj yeem ncav cuag 0.1 ~ 0.15mm, thiab hardening degree yog 20% ~ 30%. Cov tshuaj affinity ntawm titanium kuj yog loj, yooj yim los tsim adhesion nrog cov kev sib txhuam nto.
Lub thermal conductivity ntawm titanium λ = 15.24W / (mK) yog hais txog 1/4 ntawm nickel, 1/5 ntawm hlau, 1/14 ntawm txhuas, thiab thermal conductivity ntawm txhua yam ntawm titanium alloy yog li 50% qis dua qhov ntawd. ntawm titanium. Lub elastic modulus ntawm titanium alloy yog hais txog 1/2 ntawm cov hlau, yog li nws rigidity tsis zoo, yooj yim rau deformation, yuav tsum tsis txhob ua los ntawm slender pas nrig thiab nyias-walled qhov chaw, txiav ua nto rebound ntim yog loj, txog 2 ~ 3 zaug. ntawm cov hlau tsis muaj steel, uas ua rau muaj kev sib txhuam hnyav, adhesion, kev sib raug zoo hnav tom qab lub cuab yeej nto.