Thaum cov ntsiab lus hydrogen nyob rau hauv titanium tubing ntau dhau lawm, qhov cuam tshuam toughness thiab tensile lub zog yuav txo qis vim yog brittleness, yog li cov ntsiab lus hydrogen hauv titanium tubing feem ntau tau teev tseg kom tsis pub ntau tshaj {{0}}. 015%. Txhawm rau txo qhov nqus ntawm hydrogen, cov khoom hauv kev kho cua sov yuav tsum tau muab tshem tawm ua ntej cov ntiv tes, dov zeb cov cim, roj thiab lwm yam khoom seem, tsis muaj dej vapor nyob rau hauv qhov chaw ntawm lub qhov cub kho cua sov. Yog hais tias cov ntsiab lus hydrogen ntawm lub titanium raj tshaj qhov tso cai, nws yuav tsum tau muab tshem tawm los ntawm lub tshuab nqus tsev annealing. Nqus annealing kom tshem tawm hydrogen feem ntau yog nyob ntawm 538-760 degree, tsawg dua 0.066 Pa siab kom tswj tau 2-4 teev.
Thaum qhov kub tsis tshaj 540 ° C, oxide zaj duab xis nyob rau saum npoo ntawm lub titanium raj yuav tsis thickened, thiab nyob rau hauv lub kub kub kho kub (760 ° C los yog ntau tshaj), oxidation tus nqi yuav sai sai, nyob rau hauv lub kub kub kho kub (760 ° C los yog ntau tshaj), oxidation tus nqi yuav sai sai, Tib lub sijhawm, cov pa oxygen mus rau sab hauv nthuav dav ntawm cov khoom siv los tsim cov txheej txheem diffusion - cov pa phem txheej. Cov pa oxygen paug txheej muaj qhov sib piv siab brittleness ua rau tawg thiab puas ntawm qhov chaw.
Qhov zoo ntawm titanium tubing:
1. Titanium raj muaj lub zog tshwj xeeb. Titanium alloy ntom feem ntau yog nyob ib ncig ntawm 4.5g / cm3, tsuas yog 60% ntawm cov hlau, lub zog ntawm titanium ntshiab yog ze rau lub zog ntawm cov hlau zoo tib yam, qee qhov muaj zog titanium alloy siab tshaj lub zog ntawm ntau cov hlau alloy steel. Yog li ntawd, lub zog tshwj xeeb ntawm titanium alloys (lub zog / ntom) yog ntau dua li lwm cov khoom siv hlau, saib Table 7-1, tuaj yeem tsim lub zog siab, zoo rigidity, lub teeb yuag thiab cov khoom siv. Tam sim no lub dav hlau cav Cheebtsam, pob txha, tawv nqaij, fasteners thiab tsaws iav, thiab lwm yam yog siv titanium alloys.
2. Titanium tubes muaj thermal zog. Kev siv qhov kub thiab txias tshaj li cov aluminium alloy 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 muaj, tuaj yeem nyob rau hauv qhov kub thiab txias ntawm 450-500 degree kev ua haujlwm ntev ntawm ob hom titanium alloys nyob rau hauv qhov ntau. ntawm 150 degree mus rau 500 degree tseem muaj lub zog tshwj xeeb, thiab aluminium alloy ntawm 150 degree dua li lub zog ntawm qhov pom tseeb poob. Kev ua haujlwm kub ntawm titanium alloy tuaj yeem ncav cuag 500 degree, aluminium alloy yog qis dua 200 degree.
3. Titanium raj muaj corrosion kuj zoo. 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 muaj zoo heev corrosion kuj. Tab sis titanium muaj qhov txo qis oxygen thiab chromium ntsev media corrosion kuj tsis zoo.
4. Titanium raj muaj qhov ua tau zoo ntawm qhov kub thiab txias. 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, xws li TA7, nyob rau hauv -253 degree kuj tseem tuaj yeem tswj tau qee yam ntawm plasticity. Yog li ntawd, titanium alloy kuj yog ib qho tseem ceeb ntawm cov khoom siv hluav taws xob qis.
Tshem tawm cov pa paug txheej txheej muaj cov txheej txheem kev ua haujlwm (xws li sandblasting, chav chipping, thiab lwm yam), los yog pickling, tshuaj milling thiab lwm yam kev siv tshuaj, hauv kev kho cua sov, lub sij hawm cua sov yuav tsum luv luv kom ntau li ntau tau raws li qhov chaw ntawm kom ntseeg tau tias kev kho cua sov meteoric nce, tab sis kuj nyob rau hauv lub tshuab nqus tsev vacuum los yog inert gas (argon, nitrogen, thiab lwm yam) nyob rau hauv lub cua sov rauv. Daim ntawv thov tsim nyog kuj tuaj yeem zam lossis txo cov pa phem uas tshwm sim thaum titanium raj qhov chaw raug cua sov hauv cua sov.
