Kev Siv Cov Khoom Siv Titanium Alloy hauv Kev Lag Luam Petroleum
Titanium yog ib qho tseem ceeb ntawm cov qauv hlau tsim hauv xyoo 1950s. Titanium tuaj yeem tsim cov alloys nrog lwm cov hlau los txhim kho thiab txhim kho nws cov khoom siv kho tshuab thiab lub cev kom tau raws li qhov xav tau sib txawv. Titanium thiab nws cov alloys muaj zog, tsis tshua muaj elastic modulus, zoo heev corrosion kuj, zoo biocompatibility thiab lwm yam ntxwv. Lawv tau siv dav hauv aerospace fasteners, roj av kev lag luam, engineering Cheebtsam, kev kho mob pacemakers thiab lwm yam kev lag luam.
Cov khoom siv titanium alloy siv hauv cov kav dej roj nyob txawv teb chaws feem ntau suav nrog UNS R56404 (Ti-6Al-4V-0.08Ru), UNS R55400 (Ti-5.5Al{{ 8}}.3Zr-5.7V-1.3Mo-0.10O-0.06Pd), UNSR58640 (Ti-3Al-8V -6Cr-4Zr-4Mo), UNS R56260 (Ti-6Al-2Sn-4Zr-6Mo), thiab lwm yam. Nrog rau kev nce qib ntawm thev naus laus zis, TC4 (Ti-6Al-4V) titanium alloy nrog zoo corrosion kuj thiab siab tshwj xeeb zog yog maj mam siv nyob rau hauv kuv lub teb chaws cov roj zoo kav.
Feem ntau ntawm kuv lub teb chaws cov kav dej ib txwm siv yog ua los ntawm cov pa roj carbon steel, xws li G105, L80, N80, P110, thiab lwm yam. Txawm li cas los xij, qhov chaw tsim kho roj thiab roj hauv kuv lub tebchaws kuj hnyav heev. Cov kav dej roj tsis yog tsuas yog ntsib cov teeb meem ntawm qhov kub thiab txias siab thaum ua haujlwm hauv av, tab sis kuj yuav tsum tiv thaiv kev sib xyaw ua ke ntawm corrosive ib puag ncig xws li H2S, CO2, high-concentration brine / ua tiav kua, elemental sulfur thiab muaj zog acid. Cov pa roj carbon steel roj zoo kav tsis tuaj yeem ua tau raws li qhov kev pabcuam hnyav.
Titanium alloy roj kav thiab casings yuav raug rau cov sab nraud siab loads underground. Liu et al. tsim ib tug tshiab titanium alloy roj casing lub zog twv ua ntej qauv raws li lub zog thiab compression qauv qauv, thiab xam thiab muab piv rau compressive zog ntawm titanium alloy kav thiab steel kav nrog txawv qhov tseem ceeb tsis. Cov txiaj ntsig kev sim qhia tau hais tias lub zog compressive ntawm titanium alloy kav yog tsawg dua li ntawm cov kav hlau steel ntawm tib qhov tshwj xeeb. Yog li ntawd, lub zog compressive ntawm titanium alloy roj kav thiab casings yog qhov tseem ceeb rau kev nyab xeeb ntawm cov yeeb nkab hlua hauv av.
Cov kws tshawb fawb txawv teb chaws Schutz et al. nthuav tawm UNS R56404 titanium raj rau cov kua mercury, thiab ua rau muaj kev ntxhov siab, nruam tensile thiab cyclic loading tests nyob rau hauv cov xwm txheej ntawm cov roj thiab roj. Lawv pom tias hauv cov kua mercury ntawm 232 degree, titanium hlab tuaj yeem tiv taus cov kua hlau embrittlement thiab lwm yam kev puas tsuaj ntawm ib puag ncig.
Lawv kuj tau kawm txog kev siv cov kua qaub ntawm UNS R55400 titanium alloy raws li ANSI / NACE MR0175 / ISO 15156 tus qauv. UNS R55400 belongs rau + hom titanium alloy, uas yog ib hom tshiab ntawm high-strength titanium alloy tshwj xeeb uas tsim los rau high-temperature thiab high-pressure roj thiab roj cov kev pab cuam. Lawv pom tias UNS R55400 titanium alloy tuaj yeem siv rau hauv thaj chaw acidic brine nrog txog 198 g / L chloride (saturated), thiab tuaj yeem siv rau hauv acidic tej yam kev mob nrog lub siab tshaj plaws hardness ntawm 41 HRC, qhov siab tshaj plaws kub ntawm 288 degree, nrog los yog tsis muaj leej faj, thiab tiv taus yam tsawg 3.45 MPa H2S ib nrab siab thiab 6.9 MPa CO2 ib nrab siab.
Yog li ntawd, qhov corrosion kuj ntawm titanium alloy roj zoo yeeb nkab yog zoo dua li cov tsoos carbon steel roj zoo yeeb nkab. Thib ob, nws tuaj yeem ua kom muaj zog los ntawm kev laus kev kho mob txhawm rau txhim kho nws tus kheej cov khoom siv kho tshuab, thiab muaj cov yam ntxwv zoo ntawm kev tiv thaiv cov kua hlau embrittlement, sulfur thiab acid tsis kam. Txawm li cas los xij, nyob rau hauv ib puag ncig kev pabcuam nrog lub siab loj sab nraud, lub zog compressive ntawm titanium alloy roj zoo yeeb nkab yog qhov qis dua ntawm cov roj carbon steel zoo yeeb nkab. Muaj kev tshawb fawb me me hauv kuv lub teb chaws yuav ua li cas txhawm rau txhim kho compressive thiab khoov lub zog ntawm titanium alloys. Yog li ntawd, nws yog ib qho tseem ceeb heev los kawm txog yuav ua li cas tswj lossis txhim kho lub zog ntawm titanium alloy cov ntaub ntawv nyob rau hauv cov kev ntxhov siab.
Thov cia peb cov lus rau ntau titanium customized cov khoom. Hu rau peb kom tau txais qhov tseeb quotes thiab tshwj xeeb muab.
