Los ntawm cov txheej txheem mob cov ntsiab lus rau cov neeg ntse vuam: qhov kev tawm tsam precision ntawm titanium alloy kev sib txuas tshuab
Titanium Alloy Vuam
Titanium alloy, no ntau yam "cov khoom siv super uas tseem ceeb tshaj plaws hauv cov chaw tseem ceeb xws li cov dav hlau cav tuaj thiab cov pob qij taw cuav. Txawm li cas los xij, hauv kev tsim khoom ntxiv, nws ib txwm muaj "Cookar muaju, zoo li cov kab ua ke, uas yooj yim tawg, txo qis kev ua tau zoo.
Tsis ntev los no, Harbin Lub Koom Haum ntawm thev naus laus zis thiab kev ua nom tswv Muaj zog, tab sis kuj tseem muaj kev sib txuam hauv kev ua tau zoo!
A.Qhov cov kev sib tw tseem ceeb ntawm titanium alloy vuam txheej txheem
Titanium alloys pom cov tshuaj ruaj khov zoo heev thiab cov neeg kho tshuab hauv chav tsev kub. Txawm li cas los xij, thaum lub tshuab ntsuas kub tshaj li 800℃tseem ceeb, lawv lub pob physicochemical cov khoom yuav raug hloov pauv tseem ceeb, muab rau peb cov txheej txheem tseem ceeb:
1. Cov khoom siv ua tsis tau zoo vim qhov siab - xidation
Nyob rau hauv lub siab -} kub ib puag ncig ntawm vuam, cov tshuaj tiv thaiv kev sib tw ntawm kev loj hlob ntawm titanium dioxide (ti₂) Oxide txheej. Qhov cuam tshuam ntawm cov oxide txheej ntawm cov khoom ua tau zoo yog dual- kev puas tsuaj: ntawm ib sab tes, nws lub sij hawm ntawm cov khoom siv hluav taws xob, tsim cov ntawv me me cov ntsiab lus; Ntawm qhov tod tes, kev sim cov ntaub ntawv qhia tau tias thaum cov ntsiab lus oxygen nyob rau hauv lub weld cheeb tsam tshaj li 50%, txo qis kev ntseeg tau.
2. Brittle embrittlement cuam tshuam los ntawm hydrogen nkag
Thaum lub sij hawm vuam, puag ncig cov av noo (RH> 40%) lossis xaim cov roj sib kis (roj / oxides) yuav decomepe los ua cov athunchen hydrogen oms. Cov atoms diffuse rau hauv titanium lattice tom qab ua koob Nws tsim nyog sau cia tias qhov no cov txheej txheem yog qhov kub -} nkag siab; Hauv ib puag ncig hauv qab -20 degree, Lub pob txha me, cov khoom siv tawv tawv muaj peev xwm txo qis los ntawm 30%, thiab cov pob txha ua kom pom tseeb yam tsis muaj kev cuam tshuam zoo.
3. Nraj pib vim kev kub ntxhov siab
Cov coefficient ntawm thermal expansion ntawm titanium alloys (8.6}) yog ib qho ntawm cov hlau, tab sis kev tawm suab sov thaum lub sij hawm vuam muaj peev xwm ncav cuag 5000-10000 w / cm. Qhov kev tsis sib haum xeeb no hauv thermodynamic tsis ua rau muaj kev ntxhov siab ntau npaum li 300-500 MPa hauv thaj chaw weld thaum txias. Thaum lub vuam ceev tshaj li 0.8 m / min lossis txias txias gradient> 50℃/ s, qhov kev ntxhov siab pom zoo tshaj tus nqi thiab kev tawm tsam ntawm cov cua sov.
b. Cov ncauj lus kom ntxaws piav qhia ntawm plaub tus txheej txheem contement rau kev daws cov titanium alloy vuam cov nyom
Tungsten inert roj vuam (Tig vuam) - Golden txheem rau precision vuam
Raws li cov txheej txheem uas nyiam tshaj plaws rau nyias -}} Cov kab mob ua tsaug rau cov neeg siv tshuaj kho mob, ib qho kev siv tshuaj tiv thaiv kev ua haujlwm thiab ua kom sov tshav kub tswj. Nws cov tub ntxhais nyob hauvTsim kom muaj peb {-} Kev tiv thaiv qib qib:
Txheej tseem ceeb tiv thaiv:Lub tungsten electrode nozzle lub tsheb sib cav yuav tsum tau tswj hwm ntawm 15-25l / min los ua kab hlau txuas mus tas li
Backing Kev Tiv Thaiv Txheej Txheej:Argon Flow tus nqi ntawm 5-10L / min tom qab ntawm weld kom tiv thaiv rov qab oxidation
Tshav kub tiv thaiv tshav kub txuas ntxiv:Siv cov ntaub thaiv npog los npog thaj chaw nrog kub> 400℃los xyuas kom meej cov roj txheem hluav taws xob thaum lub sijhawm txias
Nqus plua plob welding welding - kev daws rau high-}}}}}}}}}}}} kev sib koom ua ke
Nyob rau hauv ultra - Lub tshuab nqus tsev siab dua (lub tshuab hluav taws xob loj dua los yog sib npaug ntawm 1-150kv voltage, ua tiav:
Xoom qias neeg melling:Oxygen - dawb ib puag ncig zam kev zam oxidation, Weld Purity Mus Txog 99.99%
Ultra - deep nkag vuam lub peev xwm: 1, Haum rau cov phaj 10-100mm tuab (piv txwv li, AERPACACE tso tsheb hlau luam)
Extremely Narrow Heat Affected Zone: Width only 0.5-1mm, material mechanical property retention rate >95%
Laser Vuam - Cov Cuab Yeej Revolution rau Kev Tsim Kho Tau
Txais yuav ib 4-20kW fiber ntau laser, txuag wrding yog ua tiav los ntawm kev ua kom zoo rau cov hauv qab no:
Ceev kom zoo dua:Vuam ceev mus txog 1-5m / min, 3-5 zaug sai dua li Tig vuam
Dynamic tiv thaiv system:Nrog rau ntawm sab Argon Tshuab Kev Tiv Thaiv Hood (txaus tus nqi 20-30L / min) los tiv thaiv cov oxidation tom qab
Ntse parameter txuam nrog:Fais fab ntsuas hluav taws xob tswj tau nyob rau hauv thaj tsam ntawm 10-}} 10⁶w / cmo} 10⁶w / cmo kom tsis txhob hlawv-los ntawm fusion fusion
Diffusion bonding - cov txheej txheem tshwj xeeb rau koom nrog cov ntaub ntawv tsis sib xws
Rau vuam titanium alloys nrog hlau / tooj liab thiab lwm yam ntaub ntawv, lub siab diffusion txheej txheem yog saws:
Txheej Txheem Qhov rai:Kub 800-950 degree, siab 10-50 MPa, sijhawm 30-120 min
Interface tswj:Npib tsib xee / molybdenum interlayer yog siv los txhawm rau txhim kho qhov kev tsim ntawm brittle beges xws li ti {{fe} fe
Cov Kev Siv Raug:Cov pob txha kho pob txha pob txha (Ti6al4V / 316L stainless hlau) sib koom tes ntau dua los yog sib luag rau 80% ntawm niam txiv cov khoom
c. Parameter chaw: cov "no" txiav txim siab ua tiav lossis tsis ua tiav
1. Tam sim no: kho raws li lub phaj tuab. 1 mm titanium phaj siv 50-80-150a. Qhov loj dhau tam sim no yuav ua rau coarse nplej, thiab cov khoom me me dhau heev yuav ua rau tsis muaj txiaj ntsig.
2. Tiv thaiv cov roj: 99.99% high- tus nqi txaus yuav tsum tau tswj ntawm 20- 30l / min. Tom qab vuam, cov pa roj yuav tsum nres rau 5-10 vib nas this los tiv thaiv "theem nrab oxidation" ntawm cov head-kub weld.
3. VUAM CEEV: 50 {- 100mm / min yog pom zoo rau nyias-walled seem thiab 30-50 feeb rau cov phiaj tuab. Kev nrawm nrawm nrawm yuav yooj yim ua rau cov hws, thaum qeeb qeeb yuav nthuav cov cua sov tuaj yeem cuam tshuam cov cua sov.
d. Groove kev kho mob: siv v {{1} Daim zawj zoo li lub ntsej muag, thiab tsis txhob sib txuas nrog cov tes (thiab tsis txhob sib txuas nrog cov ntiv tes
4. Los ntawm "tsim nyog" rau "zoo heev": "Ib tug -} Khoov
Los ntawm "tsim nyog" rau "zoo heev": titanium alloy weld zoo cov qauv thiab cov tswv yim kev txawj ntse
1. Silvery Dawb: Zoo meej! Tag nrho muaj kev tiv thaiv, tsis muaj oxidation, tuaj yeem siv rau hauv high-}} xaus scenes xws li aerospace.
2. Lub Teeb daj: oxidized me ntsis, kev ua tau zoo yeej ua tau raws cov qauv, haum rau cov khoom lag luam uas muaj.
3. Tsaus daj / Golden Daj: Moderate Oxidation, muaj kev pheej hmoo ntawm kev sib tw, thiab cov khoom sib tw kws kho mob yog qhov yuav tsum tau ua.
4. Xiav / Grey: Oxidation Oxidation, tus Weld tau hloov tshiab thiab yuav tsum tau ua dua tshiab.
Nrog rau cov nrov ntawm kev ntse vuam cov cuab yeej, titanium alloy vuam yog hloov los ntawm "cia siab rau kev paub ntawm cov qub tub rog" rau "parametric precision tswj". Ntawm lub tshuab nqus tsev vuam hlau rau tiag- lub sijhawm saib xyuas cov tshuab, cov teeb meem thev naus laus zis "muaj teeb meem. Yav tom ntej, nrog kev thov ntawm titanium alloys hauv cov khoom siv hluav taws xob tshiab, siv rau lwm cov khoom siv hluav taws xob zoo dua li no "kom muaj scararios ntau dua.
