Kev Tuav Vuam Technology ntawm Titanium Alloy Conduits
Aug 13, 2025
Titanium alloy muaj cov yam ntxwv ntawm kev ceev qis, lub zog siab thiab corrosion tsis kam. Raws li hom khoom tshiab, titanium alloy kav yog dav siv nyob rau hauv aerospace teb. Qhov kev faib ua feem ntawm titanium alloy conduits nyob rau hauv aerospace cav xa hluav taws xob nce ntxiv. Ntxiv rau, titanium alloy yog cov hlau nquag heev. Nws muaj ib qho zoo heev rau gases xws li oxygen, hydrogen thiab nitrogen ntawm cov kub thiab muaj peev xwm nqus thiab pleev roj zom. Tshwj xeeb tshaj yog nyob rau hauv cov txheej txheem vuam, qhov kev muaj peev xwm no tshwj xeeb yog muaj zog raws li kev siv kub nce ntxiv. Thaum lub sij hawm vuam, nws yog ib qho tsim nyog los tswj qhov nqus thiab kev nqus ntawm cov roj av xws li oxygen xws li oxygen thiab nitrogen kom tsis txhob cov khoom scrapping. Qhov no coj kev nyuaj rau cov vuam ntawm titanium alloy kav.
2 Los Saib Argon Arc Vuam ntawm Titanium Alloy Conduits
2.1 Weldability ntawm titanium alloy conduits
(1) Brittleness ntawm Welded Cov Pob Qij
Nyob rau hauv chav tsev kub, titanium reacts nrog oxygen los ua ib zaj yeeb yaj kiab tuab, uas ua rau nws muaj cov tshuaj ruaj khov thiab corrosion tsis kam. Thaum kub siab, tshwj xeeb tshaj yog thaum lub vuam, titanium alloys tshwm sim sai heev nrog oxygen, thiab nitrogen. Thaum cov pa roj yeeb zoo xws li oxygen, hydrogen, thiab nitrogen txeeb tau lub pas dej molrade, cov yas, muaj xim tawv, thiab cov xim saum npoo ntawm welded sib txuas tau ntau. Tshwj xeeb tshaj yog nyob rau qhov kub siab tshaj 882 degree, cov noob qoob loo ntawm kev ua kom txias, thiab cov martensite qauv yog tsim kom muaj zog, thiab hardness, yas, thiab tawv ntawm kev sib koom ua ke. Kev nyiam tshaj plaws yog qhov hnyav, thiab kev sib koom tes dhau los ua qhov loj heev. Yog li ntawd, thaum vuam titanium alloys, lub pas dej molten, tee dej, thiab siab}}}
(2) Porosity
Porosity yog qhov tsis xws luag nyob rau hauv vuam ntawm titanium thiab titanium alloys, thiab feem ntau tshwm sim ze ntawm kab fusion. Hydrogen yog lub ntsiab ua rau muaj huab cua tsim. Thaum lub sij hawm vuam, titanium muaj lub zog muaj zog los nqus hydrogen (tseem muaj zog nyob rau ntawm qhov kub siab), tab sis nws solubility txo qis uas yog qhov ntsuas kub. Yog li ntawd, hydrogen yaj nyob rau hauv cov kua hlau feem ntau tsis muaj sijhawm khiav dim thiab sau nyob ze ntawm txoj kab fusion los ua cov hws.
(3) ncua cov kab nrib pleb hauv qhov ze -} ntug cheeb tsam
Titanium alloys muaj kev tawg (qeeb tawg) nyob ze {{{0} {cov npoo hauv ib lub sijhawm tom qab vuam. Qhov laj thawj rau qhov no yog tias hydrogen diffuses los ntawm siab- kub molten pas dej rau qhov kub kub {}}}}}} cuam tshuam cheeb tsam. Raws li cov ntsiab lus hydrogen nce ntxiv, tus nqi ntawm ti2 precipitated, ua kom cua sov- cuam tshuam cheeb tsam ntau. Tsis tas li ntawd, cov txheej txheem kev nyuaj siab tsim los ntawm lub ntim nthuav dav ntawm hydride nag los thaum kawg ua rau tawg.
2.2 Kev Xav Tau Vuam thiab Ceev Fwm Rau Titanium Alloy Conduits
(1) Sim ua kom teeb tsa lub tsev vuam vuam. Kev haus luam yeeb yog nruj me ntsis txwv nyob hauv tsev. Qhov chaw ib puag ncig yuav tsum tau ceev kom huv thiab qhuav, thiab cua contrection yuav tsum tau tswj hwm nruj.
(2) Welders yuav tsum hnav cov khaub ncaws ua haujlwm huv thiab cov hnab looj tes tawm thaum vuam. Nws yog nruj me ntsis txwv tsis pub kov cov khoom nrog txhais tes liab qab.
(3) thaj chaw vuam thiab cov nplaim hluav taws xob yuav tsum yog degreased nrog acetone.
(4) Siv siab {{{{- Cov pa roj argon nrog lub purity tsis tsawg tshaj li 99.99%. Cov pa roj txaus thaum lub sijhawm vuam yuav tsum tau ua raws li tus nqi teev nyob rau hauv cov txheej txheem txheej txheem los tiv thaiv pem hauv ntej thiab sab nraum qab ntawm Weld.
(5) Thaum lub sij hawm vuam sib tw, cov neeg sib cav ntws hauv cov ntaub pua chaw sib cav hauv lub tshuab weld
(6) Cov ARC luv luv vuam yuav tsum tau siv kom ntau li ntau tau, thiab cov kab vuam lub zog yuav tsum yog me me.
(7) Thaum cov chaw vuam cov yeeb nkab yeeb nkab yeeb yaj kiab, cov kis yuav tsum tsawg dua 30% ntawm phab ntsa tuab. Txhua Weld yuav tsum ua kom tiav rau hauv ib daim hla ntau li ntau tau.
(8) Thaum lub sij hawm vuam, lub cuab yeej vuam yuav tsum tsis txhob viav vias sab laug thiab sab xis, thiab cov molten kawg ntawm lub vuam hlau yuav tsum tsis txhob tsiv tawm ntawm thaj chaw tiv thaiv roj. Thaum ciav lub arc, cov roj yuav tsum tau muab rau 10-15 vib nas this ua ntej. Thaum lub arc yog extinguished, lub vuam phom yuav tsum tsis txhob nqa tam sim ntawd. Cov pa roj yuav tsum tau ncua rau 15-30 feeb txog thaum lub sijhawm kub poob qis dua 250 degree.
2.3 txoj kev vuam
2.3.1 Ntxuav ua ntej vuam.
Qhov tshwm sim ntawm vuam tsis xws luag yog ze ze rau qhov kev huv si ntawm weldment thiab vuam hlau. Ua ntej vuam, cov roj, cov yeeb yaj kiab, oxide zaj duab xis thiab lwm cov av tsis pub dhau 15 txog 20 hli ntawm cov xaim hlau yuav tsum raug ntxuav. Txoj kev tu tuaj yeem yog tshuaj lom neeg (pickling) lossis tshuab txhais tau tias (txhuam txhuam hniav ntawm cov nplai sib tw. Acetone lossis dej cawv yuav tsum tau siv rau kev tu ua ntej vuam. Kev tu tshuaj rau kev tu tom qab kev tu yuav tsum welded nyob rau hauv 24 teev, txwv tsis pub nws xav tau ntxuav dua. Nws yog qhov zoo tshaj plaws rau lub tshuab nqus tsev dehydorate lub vuam hlau tom qab pickling thiab degrease nws nrog acetone ua ntej vuam.
2.3.2 Kev Tiv Thaiv Pas.
Thaum vuam titanium yeeb nkab pob qij txha, txhawm rau tiv thaiv kev sib tw weld thiab cov khoom muaj kev tiv thaiv los ntawm kev ua kom muaj kev tiv thaiv los ntawm kev ua kom tsis muaj roj av tsawg dua 99.99%.
2.3.3 Xaiv cov vuam txheej txheem kev ua haujlwm.
(1) Xaiv cov vuam hlau. Cov hom ntawm cov xaim xaim yuav tsum tau xaiv raws li cov khoom siv hauv paus. Feem ntau, tib cov khoom siv raws li cov khoom siv hauv paus yuav tsum siv. Qee zaum, txhawm rau txhim kho cov plasticity ntawm kev sib koom ua ke, xaim nrog ib qho qis dua qis dua kev ua tiav ntau dua li cov khoom siv hauv paus tau xaiv tau. Lub cheeb ntawm cov hlau vuam yuav tsum raug xaiv raws li qhov tuab ntawm cov khoom siv hauv paus.
(2) Xaiv cov khoom siv fais fab thiab polarity. Titanium thiab titanium alloy vuam feem ntau siv ARC phau ntawv Tungsten Arc fais txheej, thiab nws cov qauv kev sib txuas ua ke siv DC qhov kev sib txuas zoo.
(3) Xaiv tungsten electrode. Lub cheeb ntawm tungsten elemsten yog xaiv rau ntawm phab ntsa tuab ntawm titanium alloy Tube yuav tsum yog av rau hauv 255℃lub khob.
Lub tuam txhab khav ua cov khoom lag luam hauv tsev titanium ua ntau lawm, nrog rau:
German -} imported precision titanium raj ntau lawm kab (txhua xyoo tsim muaj peev xwm: 30,000 tons);
Japanese -} technology titanium ntawv ci rolling kab (thinnest rau 6μm);
Qoos motated titanium qws txuas ntxiv mus rau kab extrusion;
Ntse titanium phaj thiab sawb fining;
MES system ua noj digital tswj thiab kev tswj hwm ntawm tag nrho cov txheej txheem ntau lawm, ua tiav cov khoom lag luam seem ntawm ± 0.01M.
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