TC4, TC6, TC11 Thiab Lwm Yam Titanium Alloy Rods Thiab Lawv Cov Txheej Txheem Kev Kho Hniav

Titanium yog ruaj khov heev nyob rau hauv cov huab cua ntawm chav tsev kub, thaum rhuab mus rau 400 ~ 550 degree, nws generates ib txheej ntawm cov khoom oxide zaj duab xis rau saum npoo, tiv thaiv oxidation ntxiv ntawm cov nyhuv tiv thaiv. Titanium nqus pa oxygen, nitrogen, hydrogen yog qhov muaj zog heev, cov roj no muaj kev phom sij heev rau cov hlau titanium impurities, txawm tias cov ntsiab lus me me (0.01% ~ 0.005%) kuj tuaj yeem cuam tshuam rau nws cov khoom siv kho tshuab.
Hauv titanium tebchaw rau titanium dioxide (TiO2) yog tus nqi siv tau tshaj plaws. ti02 yog inert rau tib neeg lub cev, tsis muaj tshuaj lom, nws muaj cov khoom siv kho qhov muag zoo heev. ti02 opaque, gloss thiab whiteness, refractive Performance index thiab tawg lub zog, muaj zog zais zog, zoo dispersion, ua los ntawm cov xim rau cov hmoov dawb, feem ntau hu ua titanium dioxide, yog dav siv. Cov tsos ntawm titanium rods thiab hlau yog zoo ib yam li qhov ceev ntawm 4.51 g / cm2, tsawg dua 60% ntawm cov hlau, refractory hlau nyob rau hauv qhov tsawg kawg nkaus ntom ntawm cov hlau ntsiab. Mechanical zog ntawm titanium uas feem ntau hu ua mechanical zog thiab purity yog heev cuam tshuam. High purity titanium muaj zoo heev machinability, elongation, seem shrinkage yog zoo, tab sis tsis muaj zog, tsis haum rau cov khoom siv. Kev lag luam ntshiab titanium muaj qhov nruab nrab ntawm impurities, muaj lub zog siab thiab plasticity, haum rau kev tsim cov khoom siv.

Titanium alloys muaj zog tsawg thiab siab plasticity, nruab nrab lub zog thiab siab zog, rau 200 (tsis muaj zog) rau 1300 (siab zog) MPa, tab sis los ntawm thiab loj, titanium alloys yuav suav hais tias muaj zog alloys. Lawv muaj lub zog siab dua li aluminium alloys, uas yog suav tias yog nruab nrab-lub zog, thiab tuaj yeem hloov tau qee yam ntawm cov hlau raws li lub zog. Piv nrog txhuas alloys, uas poob lub zog sai ntawm qhov kub siab tshaj 150 degree, qee cov titanium alloys tuav lub zog zoo ntawm 600 degree. Ntev hlau titanium vim lub teeb hnyav, siab dua li alloys ntau dua li txhuas kom lub zog siab thiab los ntawm kev lag luam Aviation txuas ntxiv rau. Nyob rau hauv saib ntawm qhov ceev ntawm titanium rau steel 57%, nws lub zog tshwj xeeb (lub zog / qhov hnyav piv lossis lub zog / qhov sib piv yog hu ua lub zog tshwj xeeb) siab, corrosion, oxidation, qaug zog tsis kam, titanium alloys, 3/4 siv rau aerospace. structural alloys raws li tus neeg sawv cev ntawm cov khoom siv, 1/4 feem ntau yog siv los ua corrosion-resistant alloys. Titanium alloy muaj lub zog loj thiab qhov ntom ntom me me, cov khoom siv kho tshuab zoo, tawv thiab corrosion kuj zoo heev. Tsis tas li ntawd, titanium alloy txheej txheem kev ua haujlwm tsis zoo, kev txiav thiab kev ua haujlwm nyuaj, hauv kev ua haujlwm kub, yooj yim heev rau nqus cov impurities xws li hydrogen, oxygen, nitrogen thiab carbon. Kuj tseem muaj kev puas tsuaj tsis zoo, cov txheej txheem ntau lawm yog complex. Lub industrialized zus tau tej cov titanium yog pib nyob rau hauv 1948. Cov kev xav tau ntawm lub aviation kev lag luam kev loj hlob, thiaj li hais tias cov titanium kev lag luam mus rau ib tug nruab nrab txhua xyoo kev loj hlob ntawm txog 8% kev loj hlob. Tam sim no, lub ntiaj teb cov khoom tsim tawm txhua xyoo ntawm titanium alloy ua cov ntaub ntawv tau mus txog ntau dua 40, 000 tons ntawm titanium alloy qib ze li 30 hom. Feem ntau siv titanium alloy yog Ti-6Al-4V (TC4), Ti-5Al-2.5Sn (TA7) thiab kev lag luam ntshiab titanium (TA1, TA2 thiab TA3).
Muaj 3 hom kev kho cua sov txheej txheem rau titanium rods thiab titanium alloy rods raws li hauv qab no:
(1) cov khoom siv kho mob thiab kev laus: lub hom phiaj yog txhawm rau txhim kho nws lub zog, titanium alloy thiab ruaj khov titanium alloy tsis tuaj yeem ua kom muaj zog rau kev kho cua sov, hauv kev tsim cov annealing nkaus xwb. + titanium alloy thiab muaj ib qho me me ntawm theem ntawm sub-stable titanium alloy tuaj yeem ua cov tshuaj kho mob thiab kev laus kom cov alloy ntxiv dag zog.
(2) Kev ntxhov siab ntxhov siab annealing: lub hom phiaj yog tshem tawm lossis txo cov kev ntxhov siab uas tshwm sim thaum ua haujlwm. Tiv thaiv tshuaj tua kab mob thiab txo qis deformation hauv qee qhov chaw corrosive.
(3) ua kom tiav annealing: lub hom phiaj yog kom tau zoo toughness, txhim kho machinability, conducive rau re-machining raws li zoo raws li txhim kho stability ntawm loj thiab lub koom haum.