TC4 titanium alloy (Ti-6Al-}4V) tau siv dav hauv ntau qhov chaw siab kawg xws li aerospace thiab kev kho mob vim nws lub zog siab, hnav thiab zoo corrosion kuj. Txawm li cas los xij, vim nws cov khoom siv tshwj xeeb, nws ntsib ntau yam teeb meem thev naus laus zis thaum lub sijhawm khoov. Txhawm rau kom ua tau zoo ntawm TC4 titanium alloy khoov qhov chaw, cov kev ceev faj hauv qab no yuav tsum tau ua raws li nruj me ntsis:
Preheating thiab tswj qhov kub thiab txias
Kev tswj xyuas meej kom tsis txhob muaj kev phom sij. TC4 titanium alloy muaj tsawg plasticity ntawm chav tsev kub. Yog tias kev ua haujlwm dabtsi yog khoov tau ua nyob rau hauv qhov chaw qis - qhov kub thiab txias, qhov tawg yuav tshwm sim heev. Yog li ntawd, ua ntej khoov, lub workpiece yuav tsum tau preheated, thiab lub preheating kub yuav tsum tau tswj nyob rau hauv qhov ntau ntawm 200-400 degree. Nyob rau tib lub sijhawm, yuav tsum tau saib xyuas tshwj xeeb kom tsis txhob muaj qhov tshwm sim ntawm cov cua sov hauv zos. Thaum qhov kub siab tshaj 500 degree, cov nplej ntawm TC4 titanium alloy yuav ua ntxhib, uas ua rau muaj kev txo qis hauv nws cov khoom siv kho tshuab. Txhawm rau kom ua tiav cov cua sov tsis sib xws thiab saib xyuas qhov ntsuas kub ntawm lub workpiece hauv lub sijhawm tiag tiag, tus ntsuas kub infrared yuav tsum tau siv los saib xyuas qhov kub ntawm lub workpiece. Tsuas yog los ntawm kev tswj xyuas qhov kub thiab txias tuaj yeem muab lub hauv paus ruaj khov rau kev ua haujlwm tom ntej.
dabtsi yog khoov ceev thiab siab tswj: Tsawg ceev thiab maj mam siab, meej them nyiaj. TC4 titanium alloy muaj cov yam ntxwv ntawm "strain aging", uas txhais tau hais tias cov teeb meem kev ntxhov siab yuav tshwm sim thaum khoov sai. Txhawm rau kom tsis txhob muaj qhov xwm txheej no, yuav tsum tau siv txoj hauv kev qis- nrawm nrawm thaum khoov, thiab qhov khoov ceev feem ntau tswj tau tsawg dua lossis sib npaug li 5 hli / s. Thaum txiav txim siab dabtsi yog khoov siab, nws yog ib qho tsim nyog yuav tsum nrhiav qhov zoo tshaj plaws siab tus nqi los ntawm kev sim khoov. Yog tias qhov siab me dhau lawm, lub workpiece khoov yog qhov yooj yim rau springback. Ntxiv mus, lub springback tus nqi ntawm TC4 titanium alloy yog ntau dua li cov hlau zoo tib yam, yog li cov nyiaj them poob haujlwm ntawm 10% mus rau 15% yuav tsum tau tshwj tseg thaum lub sijhawm ua haujlwm. Hloov pauv, yog tias lub siab siab dhau lawm, nws yuav ua rau muaj qhov tsis xws luag xws li wrinkling lossis tawg ntawm qhov khoov taw tes, cuam tshuam rau qhov zoo ntawm qhov khoov.
Pwm thiab lubrication xaiv
Kev xaiv ntawm siab- zoo thiab tsim pwm los txo kev sib txhuam yog qhov tseem ceeb rau kev ua haujlwm raug ntawm TC4 titanium alloy khoov qhov chaw. Vim yog lub siab tawv ntawm TC4 titanium alloy, txhawm rau tiv thaiv pwm hnav los ntawm kev sib txawv ntawm kev khoov qhov tseeb, pwm ua los ntawm siab - cov ntaub ntawv muaj zog, xws li H13 kub ua haujlwm tuag steel, yuav tsum tau xaiv. Cov khoom pwm no muaj kev hnav zoo heev thiab thermal stability, thiab tuaj yeem ua tau raws li qhov yuav tsum tau ua ntawm TC4 titanium alloy dabtsi yog khoov ua. Ua ntej khoov, nws tseem yuav tsum tau siv cov roj nplua nyeem tshwj xeeb titanium alloy, xws li lub siab -cov roj lubricating kub uas muaj molybdenum, mus rau thaj tsam ntawm qhov chaw ua haujlwm thiab qhov tuag. Kev siv cov roj nplua nyeem tuaj yeem txo qhov kev sib txhuam tsis zoo, tiv thaiv khawb ntawm qhov chaw ua haujlwm, thiab tib lub sijhawm kom tsis txhob muaj qhov adhesion ntawm cov tuag thiab cov khoom ua haujlwm, kom ntseeg tau tias kev ua haujlwm zoo ntawm cov txheej txheem dabtsi yog khoov.
Tom qab ua tiav thiab kev tshuaj xyuas zoo
Tom qab cov txheej txheem khoov tiav lawm, yuav muaj kev ntxhov siab sab hauv hauv TC4 titanium alloy workpiece kom tshem tawm kev ntxhov siab thiab tswj nws nruj. Yog tias tsis raug tshem tawm hauv lub sijhawm, cov kev ntxhov siab sab hauv tuaj yeem ua rau cov khoom ua haujlwm deform thaum siv tom qab. Yog li ntawd, yuav tsum tau kho kev ntxhov siab annealing. Lub workpiece yuav tsum tuav ntawm qhov kub ntawm 550-600℃rau 1-2 teev kom tshem tawm cov kev ntxhov siab sab hauv thaum ua. Kev tshuaj xyuas zoo yog qhov txuas tseem ceeb los xyuas kom meej tias TC4 titanium alloy khoov qhov chaw ua tau raws li qhov yuav tsum tau ua. Thaum lub sijhawm kuaj xyuas, cov hauv qab no yuav tsum tau txheeb xyuas nrog qhov tseem ceeb:
Lub siab ntev ntawm lub kaum sab xis yog ua raws li GB / T 3621 tus qauv, thiab kev kam rau siab ntawm lub kaum sab xis yuav tsum tswj tsis pub dhau ± 1 degree. Tsuas yog thaum lub kaum sab xis ua tau raws li qhov yuav tsum tau ua, qhov tseeb ntawm qhov khoov yuav raug lees paub thaum sib dhos thiab siv.
Nto defect
Ua tib zoo tshuaj xyuas qhov chaw ntawm qhov khoov rau qhov tsis xws luag xws li tawg lossis kev nyuaj siab. Cov teeb meem no tsis tsuas yog cuam tshuam rau qhov zoo nkauj ntawm qhov khoov qhov chaw, tab sis kuj tseem tuaj yeem txo lawv cov khoom siv thiab kev pabcuam lub neej.
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