Kev ua tau zoo ntawm Titanium Alloys

Titanium alloy muaj qhov zoo ntawm qhov ceev, muaj zog ua haujlwm tsis kam, muaj cov txheej txheem cua sov zoo thiab yog li ntawd, nws yog qhov zoo dua Aerospace engineering qauv khoom. Nws yog dav siv nyob rau hauv ntau yam teb.

Titanium yog ib yam tshiab ntawm cov hlau, titanium zog thiab cov ntsiab lus ntawm carbon, nitrogen, hydrogen, oxygen thiab lwm yam impurities hais txog cov ntsiab lus ntawm ntshiab titanium iodide impurity cov ntsiab lus tsis ntau tshaj 0.1%, tab sis nws lub zog yog tsawg, siab plasticity. 99.5% ntawm kev ua haujlwm ntawm kev lag luam titanium yog ntshiab: ceev ρ=4.5g / cm3, melting point ntawm 1725 degree, hardness HB195.

Siab zog

Titanium alloy ntom yog feem ntau nyob ib ncig ntawm 4.51g / cm3, tsuas yog 60% ntawm cov hlau, lub zog ntawm ntshiab titanium tsuas yog ze rau lub zog ntawm cov hlau zoo tib yam, qee qhov muaj zog titanium alloys siab tshaj lub zog ntawm ntau cov hlau alloy. Yog li ntawd, lub zog tshwj xeeb ntawm titanium alloy (lub zog / ntom) yog ntau dua li lwm cov khoom siv hlau, tuaj yeem tsim lub zog siab, zoo rigidity, lub teeb yuag thiab cov khoom siv. Tam sim no, titanium alloys yog siv nyob rau hauv lub cav Cheebtsam, skeletons, tawv, fasteners thiab tsaws gears ntawm lub dav hlau.

Siab thermal zog

Kev siv qhov kub thiab txias tshaj aluminium alloys ob peb puas degrees siab dua nyob rau hauv nruab nrab qhov kub thiab txias tseem tuaj yeem tuav lub zog uas yuav tsum tau ua, tuaj yeem nyob rau hauv qhov kub ntawm 450 ~ 500 degree rau kev ua haujlwm ntev; titanium alloy nyob rau hauv thaj tsam ntawm 150 degree ~ 500 degree tseem muaj lub zog tshwj xeeb heev, thiab aluminium alloys nyob rau hauv 150 degree dua li lub zog ntawm qhov pom tseeb poob. Kev ua haujlwm kub ntawm titanium alloy tuaj yeem ncav cuag 500 degree, thaum aluminium alloy qis dua 200 degree.

Zoo corrosion kuj

Titanium alloy nyob rau hauv cov huab cua ntub thiab seawater media ua hauj lwm, nws cov corrosion kuj zoo dua li cov hlau tsis muaj steel; pitting, acid corrosion, kev nyuaj siab corrosion kuj muaj zog tshwj xeeb; alkali, chloride, chlorine, organic khoom, nitric acid, sulfuric acid, thiab lwm yam. Txawm li cas los xij, titanium muaj qhov tsis zoo corrosion los txo cov pa oxygen thiab chromium ntsev media.

Kev ua haujlwm kub tsis zoo

Titanium alloy nyob rau hauv qis kub thiab ultra-tsawg kub, tseem tuaj yeem tswj nws cov khoom siv kho tshuab. Kev ua tau zoo ntawm qhov kub thiab txias, qhov sib txawv yog qhov tsawg heev titanium alloy, nyob rau hauv -253 degree kuj tseem tuaj yeem tswj tau qee qhov qib ntawm plasticity. Yog li ntawd, titanium alloy kuj yog ib qho tseem ceeb uas tsis muaj qhov kub thiab txias cov khoom siv.

Cov tshuaj lom neeg ua haujlwm siab

Titanium yog tshuaj lom neeg thiab muaj zog heev nrog O, N, H, CO, CO2, dej vapor, ammonia, thiab lwm yam hauv cov huab cua. Thaum cov ntsiab lus carbon ntau dua 0.2%, TiC nyuaj yuav raug tsim nyob rau hauv titanium alloy; Thaum qhov kub thiab txias siab dua, lub luag haujlwm ntawm N tseem yuav tsim ib txheej txheej tawv tawv ntawm TiN; saum toj no 600 degree, titanium absorbs oxygen los ua ib txheej tawv tawv nrog siab hardness; nce nyob rau hauv cov ntsiab lus hydrogen, nws kuj yuav tsim ib txheej embritled. Kev nqus ntawm cov pa thiab qhov ua rau cov tawv tawv tawv txheej txheej qhov tob txog li 0.1 ~ 0.15mm, qib hardening yog 20% ​​~ 30%. Titanium cov tshuaj affinity kuj loj, yooj yim los tsim adhesion phenomenon nrog kev sib txhuam nto.

Me me thermal conductivity, me me modulus ntawm elasticity

Titanium's thermal conductivity λ=15.24W / (mK) yog li 1/4 ntawm npib tsib xee, 1/5 ntawm hlau, 1/14 ntawm txhuas, thiab ntau yam titanium alloys muaj thermal conductivity ntawm li 50% qis dua qhov ntawd. ntawm titanium. Lub modulus ntawm elasticity ntawm titanium alloy yog hais txog 1/2 ntawm cov hlau, yog li nws rigidity tsis zoo, yooj yim rau deform, tsis haum rau ua slender rods thiab nyias-walled qhov chaw, thiab lub rebound ntawm machined nto thaum txiav yog loj heev, kwv yees li 2 mus rau 3 npaug ntau npaum li cov hlau tsis muaj steel, ua rau muaj kev sib txhuam ntse, adhesion thiab kev sib txuas ntawm lub cuab yeej lub nraub qaum hniav.