Titanium screws muaj ntau qhov zoo thiab cov yam ntxwv tshwj xeeb. Lawv tuaj yeem welded siv kev sib cuag vuam yam tsis tas yuav tsum tau npaj tshwj xeeb. Txawm li cas los xij, yog tias muaj cov yeeb yaj kiab oxide tuab, nws yuav tsum tau muab tshem tawm los ntawm kev tu txhua yam los yog siv 5% hydrofluoric acid tov.
Arc welding ntawm titanium screws yog ua los ntawm kev siv cov pa huv si xws li helium lossis argon, siv cov txheej txheem siv roj rau cov txiaj ntsig zoo. Direct tam sim no feem ntau yog siv, nrog cov tungsten electrode ua tus cathode.
Kev sib txuas ncaj qha ntawm titanium screws nrog npib tsib xee, bromine-chromium, thiab lwm yam nickel-muaj alloys tsis haum vim yog tsim ntawm cov teeb meem fusible eutectic crystals. Nyob rau hauv tas li ntawd, ib tug spacer nrog ib tug tuab ntawm 15-20 microns, feem ntau yog ua los ntawm molybdenum, tantalum, los yog niobium, yuav tsum tau muab tso rau ntawm cov ntaub ntawv uas sib txawv zog. Titanium screws los yog qhov chaw welded nrog npib tsib xee los yog npib tsib xee alloys tuaj yeem ua tau zoo annealed thiab degassed nyob rau hauv lub tshuab nqus tsev los yog inert gas ib puag ncig ntawm qhov kub txog li 1500 degree, kom ntseeg tau tej yam kev mob.
Txoj kev vuam no tshem tawm cov kab mob hauv qhov sib koom ua ke los ntawm lwm cov ntsiab lus, vim nws tsis tas yuav tsum tau tshwj xeeb solders lossis pre-metallization. Nws ua rau kev tsim cov khoom zoo, lub tshuab nqus tsev sib txuas, ua rau nws muaj txiaj ntsig zoo rau titanium screws.
Tam sim no, cia peb tshawb xyuas qhov zoo thiab cov yam ntxwv ntawm titanium screws. Thaum lub sij hawm alkaline tu txheej txheem ntawm titanium alloy rods, alkaline tov yog tu ncua tshem tawm los yog evaporated los ntawm lub workpiece. Yog li, nws yog ib qho tseem ceeb uas yuav tsum tau ua kom tiav thiab kho cov tshuaj tam sim kom tswj tau nws qhov muaj pes tsawg leeg.
Rau titanium screws, insoluble oxide slag precipitates nyob rau hauv qab ntawm lub tank tu, cuam tshuam rau lub tank lub cev thermal conductivity. Cov nag lossis daus no tuaj yeem tsim qhov khoob uas ua rau electrochemical corrosion hauv steel tso tsheb hlau luam, txo lawv txoj sia. Yog li ntawd, nws yog ib qho tseem ceeb kom ntxuav cov sediment kom sai. Kev siv lub tshuab txav hauv qab los khaws cov slag yog ib qho kev coj ua, ua kom yooj yim tshem tawm cov av los ntawm kev nqa lub tank hauv qab.
Lub zog tawm los yog hais txog qhov siab tshaj plaws ntawm cov khoom siv hlau tuaj yeem tiv taus ua ntej ua rau me me ntawm cov yas deformation. Hauv cov rooj plaub uas cov hlau tsis muaj qhov sib txawv ntawm qhov sib txawv, tus nqi kev ntxhov siab uas ua rau muaj qhov seem deformation ntawm 0.2 yog suav tias yog qhov txwv tsis pub muaj txiaj ntsig lossis yieldstrength.
Yog hais tias sab nraud quab yuam tshaj lub zog tawm los, cov khoom yuav muaj kev hloov tsis tau deformation thiab tsis tuaj yeem rov qab mus rau lawv qhov qub. Piv txwv li, cov hlau tsis muaj cov pa roj carbon monoxide muaj lub zog tawm los ntawm 207 MPa. Yog hais tias lub zog sab nraud tshaj qhov kev txwv no, cov khoom yuav deform mus tas li, thiab txo cov quab yuam hauv qab no yuav tsis rov qab zoo li qub.
