Titanium yog ib hom hlau tshiab. Kev ua haujlwm ntawm titanium muaj feem xyuam rau cov ntsiab lus ntawm impurities xws li carbon, nitrogen, hydrogen, thiab oxygen. Lub purest titanium iodide muaj cov ntsiab lus impurity tsis ntau tshaj 0.1%, tab sis nws lub zog yog tsawg thiab nws cov plasticity siab. Cov khoom ntawm 99.5% kev lag luam ntshiab titanium yog: ceev ρ=4.5g / cm3, melting point ntawm 1725 ℃, thermal conductivity λ=15.24W / (mK), tensile zog σb=539MPa, elongation δ=25%, thiab seem shrinkage Tus nqi ψ=25%, elastic modulus E=1.078 × 105MPa, hardness HB195.
siab zog
Qhov ceev ntawm titanium alloy feem ntau yog hais txog 4.51g / cm3, uas tsuas yog 60% ntawm cov hlau. Qee lub zog muaj zog titanium alloys ntau dua li lub zog ntawm ntau cov hlau sib xyaw hlau. Yog li ntawd, lub zog tshwj xeeb (lub zog / ntom) ntawm titanium alloy yog ntau dua li lwm cov khoom siv hlau, thiab cov khoom siv nrog lub zog siab, zoo rigidity thiab lub teeb yuag tuaj yeem tsim tau. Lub dav hlau' cov khoom siv cav, cov pob txha, cov tawv nqaij, fasteners thiab tsaws iav txhua yam siv titanium alloys.
High thermal siv
Qhov kev pabcuam kub yog ob peb puas degrees siab dua li ntawm aluminium alloy. Nws tseem tuaj yeem tuav lub zog xav tau ntawm qhov nruab nrab kub. Nws tuaj yeem ua haujlwm ntev ntawm qhov kub ntawm 450 ~ 500 ℃. Ob hom titanium alloys tseem muaj siab heev nyob rau hauv thaj tsam ntawm 150 ℃ ~ 500 ℃. Lub zog tshwj xeeb, thaum lub zog tshwj xeeb ntawm aluminium alloy txo qis ntawm 150 ° C. Kev ua haujlwm kub ntawm titanium alloy tuaj yeem ncav cuag 500 ℃, thaum lub txhuas alloy yog qis dua 200 ℃.
Zoo corrosion kuj
Titanium alloy ua haujlwm nyob rau hauv cov huab cua noo thiab dej hiav txwv nruab nrab, nws cov corrosion kuj zoo dua li cov hlau tsis muaj steel; nws yog tshwj xeeb yog resistant rau pitting corrosion, acid corrosion, thiab kev nyuaj siab corrosion; Nws yog resistant rau alkali, chloride, chlorine organic tshuaj, nitric acid, sulfuric acid Nws muaj zoo heev corrosion kuj. 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 alloys tseem tuaj yeem tswj hwm lawv cov khoom siv dag zog ntawm qhov qis thiab ultra-tsawg kub. Titanium alloys nrog kev ua haujlwm kub tsis zoo thiab tsis tshua muaj kev cuam tshuam cov ntsiab lus, xws li TA7, tuaj yeem tswj tau qee qib ntawm plasticity ntawm -253 ° C. Yog li ntawd, titanium alloy kuj yog ib qho tseem ceeb ntawm cov khoom siv hluav taws xob qis.
Cov tshuaj lom neeg ua haujlwm siab
Titanium muaj tshuaj lom neeg ua haujlwm siab, thiab tsim cov tshuaj muaj zog muaj zog nrog O2, N2, H2, CO, CO2, dej vapor, ammonia, thiab lwm yam hauv huab cua. Thaum cov ntsiab lus carbon ntau dua 0.2%, nws yuav tsim TiC nyuaj hauv titanium alloy; thaum kub siab dua, nws tseem yuav tsim ib txheej txheej tawv tawv ntawm TiN thaum nws cuam tshuam nrog N; Thaum qhov kub siab tshaj 600 ℃, titanium absorbs oxygen los ua ib txheej tawv tawv nrog siab hardness; Thaum cov ntsiab lus hydrogen nce, ib txheej embrittlement kuj yuav raug tsim. Qhov tob ntawm cov tawv thiab nkig txheej txheej tsim los ntawm absorbing gas tuaj yeem ncav cuag 0.1 ~ 0.15 hli, thiab qib hardening yog 20% ~ 30%. Titanium kuj muaj cov tshuaj lom neeg muaj txiaj ntsig zoo thiab yooj yim rau kev ua raws li kev sib txhuam nto.
Thermal conductivity yog me me
Lub thermal conductivity ntawm titanium λ=15.24W / (m·K) yog hais txog 1/4 ntawm nickel, 1/5 ntawm hlau, thiab 1/14 ntawm txhuas. Lub thermal conductivity ntawm ntau yam titanium alloys yog li 50 qis dua li ntawm titanium. %. Lub modulus ntawm elasticity ntawm titanium alloy yog hais txog 1/2 ntawm cov hlau, yog li nws rigidity yog pluag thiab yooj yim rau deform. Nws tsis tsim nyog los ua cov pas nrig thiab nyias-walled qhov chaw. Lub springback ntawm machined nto thaum txiav yog loj heev, txog 2 ~ 3 ntawm stainless hlau. Sijhawm, ua rau muaj kev sib txhuam hnyav, adhesion, thiab nplaum hnav ntawm lub ntsej muag ntawm lub cuab yeej.