Titanium tubes yog lub teeb nyob rau hauv qhov zoo, siab zog thiab muaj cov cuab yeej zoo heev. Nws yog dav siv nyob rau hauv cov khoom siv hluav taws xob sib pauv, xws li lub raj cua kub exchanger, coil heat exchanger, serpentine tube heat exchanger, condenser, evaporator thiab conveying pipeline. Niaj hnub no, ntau lub zog hluav taws xob hauv kev lag luam siv titanium raj raws li lawv chav tsev specification raj. Titanium raj raws li kev siv cov kev cai thiab kev ua tau zoo ntawm kev ua raws li ob lub teb chaws tus qauv: GB/T{{0}}GB/T3625-1995ASTM33738Supply Trademarks:TA0, TA1, TA2, TA9, TA10, BT1-00, BT1-0, Gr1, Gr2Supply Standards: Diameter φ4 ~ 114mm, phab ntsa thickness δ0.2 ~ 4.5mm, ntev Tsis pub dhau 15m.
Titanium alloy yog ib qho alloy uas muaj titanium ua lub hauv paus thiab lwm yam khoom. Titanium muaj ob hom homogeneous heterocrystals: -titanium nrog tuab hexagonal qauv hauv qab 882 degree, thiab lub cev-centered cubic -titanium saum toj 882 degree.
Alloying cov ntsiab lus tuaj yeem muab faib ua peb pawg raws li lawv cov txiaj ntsig ntawm theem hloov pauv kub:
① Cov ntsiab lus ruaj khov rau theem thiab txhim kho cov theem hloov pauv kub yog -stabilizing cov ntsiab lus, xws li txhuas, carbon, oxygen thiab nitrogen. Nyob rau lub sijhawm no, txhuas yog lub ntsiab alloying ntawm titanium alloy, uas muaj qhov pom tseeb los ntawm kev txhim kho lub zog ntawm chav tsev kub thiab kub, txo qhov tshwj xeeb lub ntiajteb txawj nqus thiab nce elastic modulus.
② stabilize -theem, txo cov theem hloov pauv kub ntawm cov ntsiab lus rau -stabilizing cov ntsiab lus, thiab tuaj yeem muab faib ua homocrystalline thiab eutectic hom ob. Cov qub muaj molybdenum, niobium, vanadium, thiab lwm yam .; tom kawg muaj chromium, manganese, tooj liab, hlau, silicon, thiab lwm yam.
③ Cov ntsiab lus uas tsis tshua muaj txiaj ntsig rau theem hloov pauv kub yog cov khoom nruab nrab, xws li zirconium thiab tin.
Oxygen, nitrogen, carbon thiab hydrogen yog impurities nyob rau hauv titanium alloys. Oxygen thiab nitrogen yog heev soluble nyob rau hauv -theem, uas muaj ib tug tseem ceeb ntxiv dag zog rau cov titanium alloys, tab sis lub plasticity yog txo. Feem ntau nws tau teev tseg tias cov ntsiab lus ntawm oxygen thiab nitrogen hauv titanium yog qis dua 0.15-0.2% thiab 0.04-0.05% raws li . Lub solubility ntawm hydrogen nyob rau hauv alpha theem yog tsawg heev. Cov dej yaj ntau dhau hauv titanium alloys tsim hydride, ua rau cov hlau nkig. Feem ntau, cov ntsiab lus hydrogen hauv titanium alloys yog tswj hauv qab 0.015%. Lub dissolution ntawm hydrogen nyob rau hauv titanium yog reversible thiab yuav raug tshem tawm los ntawm lub tshuab nqus tsev annealing.
Classification ntawm titanium alloys
Titanium yog ib qho allotropic isomer nrog lub melting point ntawm 1720 degree. Hauv qab 882 degree, nws muaj hexagonal lattice qauv hu ua -titanium; saum toj no 882 degree, nws muaj lub cev-centered cubic loj qauv hu ua -titanium. Siv cov yam ntxwv sib txawv ntawm ob qho tib si saum toj no cov qauv ntawm titanium, ntxiv cov khoom tsim nyog alloying, maj mam hloov cov theem hloov kub thiab cov ntsiab lus ntawm cov theem feem, kom tau txais cov titanium alloys sib txawv. Nyob rau hauv chav tsev kub, titanium alloy muaj peb hom matrix, titanium alloy kuj muab faib ua peb pawg: alloy, (+) alloy thiab alloy. Peb lub teb chaws mus rau TA, TC, TB, feem.
titanium alloy
Nws yog ib theem-theem alloy tsim los ntawm -phase khoom tov, uas yog -theem tsis muaj teeb meem ntawm qhov kub thiab txias ntawm cov ntaub ntawv siv tau, nrog kev ruaj khov, siab hnav tsis kam tshaj titanium ntshiab, thiab muaj zog oxidation tsis kam. Qhov kub ntawm 500 degree ~ 600 degree, tseem hais kom nws lub zog thiab nkag siab, tab sis tsis tuaj yeem ntxiv dag zog los ntawm kev kho cua sov, chav sov lub zog tsis siab.
Titanium alloy
Nws yog ib-theem-theem alloy muaj li ntawm-theem khoom kho cua sov kev kho mob uas muaj lub zog siab, quenching, aging lub alloy yog ntxiv dag zog, chav tsev kub txog li 1372 ~ 1666MPa; tab sis tsis zoo thermal stability, yuav tsum tsis txhob siv nyob rau hauv high kub.
