Cov tshuaj tsuag txias yog cov txheej txheem hauv lub xeev cov txheej txheem uas cov hmoov txhuas tau nrawm nrawm mus rau qhov nrawm nrawm hauv cov cua kub, cov pa roj cua kub thiab sib txuas rau lub substrate los ntawm cov yas deformation loj heev ntawm kev cuam tshuam. Vim hais tias cov khoom tsis yaj, cov txheej txheem tso nyiaj aluminium ntawm qhov kub ntawm qhov qis dua qhov melting point ntawm cov khoom, uas yog vim li cas nws tau dhau los ua ib txoj hauv kev los txhim kho cov khoom hnav lossis puas aluminium es tsis txhob khawb lawv. Kev kho yog tsim los ntawm txheej txheej, tom qab ntawd ua tiav los ntawm cov pa machining, yog li cov thev naus laus zis yog siv rau kev kho kom zoo nkauj, rau kev sib khi porosity thiab ntxiv rau corrosion resistant lossis conductive txheej rau ib feem uas twb muaj lawm.
Aluminium Cold Spray Bonding ua haujlwm li cas
Bonding nyob ntawm particle tshaj tawm es tsis yog ntawm tshav kub. Txhua hmoov particle yuav tsum tshaj qhov tseem ceeb tshaj tawm rau cov khoom tshwj xeeb thiab particle loj; Hauv qab no qhov pib ntawm qhov particle tsuas yog rebounds thiab erodes saum npoo, thaum zoo tshaj nws cov particle deforms thiab tsim ib daim ntawv cog lus metallurgical nrog txheej hauv qab. Rau cov ntshiab txhuas, qhov tseem ceeb tshaj plaws feem ntau poob hauv thaj tsam li ntawm 600 txog 700 m / s, thiab tus nqi pes tsawg nyob ntawm cov hmoov me me, cov ntsiab lus oxygen thiab cov pa roj.
Propellant gas:nitrogen yog tus qauv kev xaiv rau txhuas, thaum helium tso cai rau tib lub nrawm ntawm qhov kub thiab txias qis thiab qis stagnation siab.
Gas tej yam kev mob:inlet pressures ntawm li 2 mus rau 5 MPa nrog roj preheat mus txog roughly 500 ° C yog ib yam rau txhuas deposition.
Hmoov:kheej kheej, roj atomized txhuas hmoov nyob rau hauv thaj tsam ntawm 15 mus rau 45 micrometers muab qhov zoo tshaj plaws deposition efficiency.
Standoff thiab traverse:nozzle rau substrate deb ntawm roughly 10 mus rau 30 mm, nrog ib tug neeg hlau traverse uas ua rau lub deposition lub kaum sab xis nyob ze ntawm perpendicular.
Deposition efficiency:Feem ntau 70 mus rau 90 feem pua rau txhuas rau ntawm aluminium substrate nrog qhov tsis raug, qhov seem yog overspray uas tau sau thiab rov ua dua.
Qhov nrawm nrawm tsis ntsuas ncaj qha rau hauv lub dav hlau, yog li cov cuab yeej xws li Doppler velocimeters yog siv los ua tus cwj pwm thiab saib xyuas lub plume; calibration ntawm cov cuab yeej no ntawm lub sij hawm ua hauj lwm lub sij hawm yog ib tug txheej txheem zoo yuav tsum tau nyob rau hauv tsim nyog cov tshuaj tsuag cov khw. Cov txheej txheem qhov rais yog tsim los sim rau txhua cov hmoov thiab substrate ua ke vim hais tias qhov tseem ceeb tshaj tawm hloov nrog cov ntsiab lus alloy, thiab aluminium alloys nrog siab magnesium los yog silicon cov ntsiab lus coj txawv ntawm kev lag luam ntshiab txhuas.
Kev npaj substrate thiab Dimensional Restoration
Qhov zoo ntawm daim ntawv cog lus yog txiav txim siab ua ntej thawj zaug dhau. Lub substrate yog degreased, ces qhib los ntawm grit blasting nrog huv si alumina los yog ib tug sib piv abrasive kom tshem tawm oxide thiab tsim ib tug anchoring profile. Txhua cov roj, noo noo los yog xoob oxide nyob rau saum npoo yuav ua rau lub dav hlau delamination, yog li lub sijhawm ntawm kev npaj thiab tshuaj tsuag yog tswj, thiab qhov chaw yuav qhuav thiab tsis muaj plua plav thoob plaws.
Rau qhov seem rov qab kho qhov chaw puas yog thawj zaug npaj los ntawm machining los yog sib tsoo kom tshem tawm cov khoom tawg thiab cov kab mob thiab kom nthuav tawm cov suab hlau, thiab cov ntug ntawm qhov kho kab noj hniav feem ntau yog chamfered kom cov txheej txau yog anched mechanically ntawm ciam teb. Cov kaum sab xis yog khaws cia ze rau ntawm qhov perpendicular, thiab cov txheej txheej yog tsim los ntawm kev tswj cov hlais uas txwv qhov kub nce hauv cov khoom. Cov phab ntsa nyias nyias tau txais txiaj ntsig tshwj xeeb los ntawm txoj hauv kev no, vim tias cov khoom siv hluav taws xob tsawg tsis txhob cuam tshuam qhov cuam tshuam thiab kub cuam tshuam cheeb tsam uas fusion txheej txheem xws li vuam lossis laser cladding tsim.
| Kho theem | Hom tswj point |
|---|---|
| hmoov tuav | Batch traceability, tswj kev ya raws, particle loj pov thawj |
| Kev npaj nto | Blast profile thiab huv si, siab tshaj plaws tuav lub sij hawm ua ntej tshuaj tsuag |
| Deposition | Gas siab thiab kub, traverse ceev, standoff, pass suav |
| Tshaj tawm - kev ua haujlwm | Kev kho cua sov los yog kub isostatic nias, machining mus rau qhov kawg qhov ntev |
| Kev tshuaj xyuas | Porosity theem, daim ntawv cog lus lub zog, hardness, conductivity, residual stress |
Ncej -Kev Ua Haujlwm Uas Txhim Kho Kev Kho Kom Zoo
Raws li sprayed aluminium yog ib qho kev ua hauj lwm hardened, me ntsis ntxeem tau qauv, thiab cov khoom ntawm qhov kho qhov chaw yog feem ntau txhim kho los ntawm ib tug thermal lossis mechanical kho tom qab deposition.
Kub isostatic nias:nias ntawm ib ncig ntawm 350 ° C los yog saum toj no tuaj yeem kaw qhov feem ntau ntawm cov ntu ntu nruab nrab thiab nce qhov ceev thiab qaug zog ua haujlwm ze rau qhov txiaj ntsig wrought.
Kev kho cua sov:kev tswj lub voj voog lossis lub voj voog kev laus raws li cov txheej txheem substrate alloy txo cov kev ntxhov siab seem thiab, rau nag lossis daus hardening alloys, rov ua ib feem ntawm lub zog poob hauv qhov kev pabcuam thawj zaug.
Laser shock peening lossis txhaj tshuaj peening:qhia txog kev ntxhov siab ntawm qhov chaw thiab tuaj yeem ua rau qaug zog lub neej nyob qhov twg thaj chaw kho yog loaded heev.
Micro-arc oxidation los yog anodizing:muab kev tiv thaiv corrosion rau ntawm qhov chaw tiav thiab nquag teev rau qhov chaw raug cov av noo lossis dej ntsev.
CNC finishing:nqa cov nyiaj rov qab mus rau qhov ntev ntawm qhov kos duab thiab tuaj yeem ua tiav qhov tiav ntawm Ra 0.8 micrometers lossis zoo dua, piv rau qhov chaw nyob ib puag ncig.
Cov qauv, Kev Tsim Nyog thiab Kev Tshawb Fawb
Kev tsim nyog cov tshuaj tsuag tsuag ua haujlwm yog tswj hwm los ntawm cov txheej txheem tshwj xeeb; cov tub rog cov ntaub ntawv deposition tus qauv rau cov tshuaj tsuag txias yog cov ntaub ntawv ib txwm siv, kev txhawb los ntawm cov dav hlau metallurgical xeem txoj kev siv lwm qhov hauv kev tsim khoom. Kev ntsuam xyuas nruj ua raws li ASTM E8 / E8M, microindentation hardness kuaj ua raws li ASTM E384, thiab kev kuaj xyuas corrosion ntawm cov khoom tiav tiav siv cov tshuaj ntsev ntsev tsis zoo rau ISO 9227 lossis ASTM B117. Qhov twg kho qhov chaw yuav tsum nyob twj ywm hluav taws xob, eddy tam sim no conductivity ntsuas yog siv los xyuas kom meej tias cov deposit yog nyob rau hauv ib tug txhais feem pua ntawm lub hauv paus khoom nqi.
Cov qauv kev lees paub rau kev kho dav hlau tseem ceeb suav nrog porosity hauv qab li ntawm 0.3 feem pua hauv cov txheej txheem tso nyiaj, cov ntawv cog lus lub zog ntsuas los ntawm tensile lossis shear testing ntawm cov pov thawj daim coupon, residual stress verified los ntawm X ray diffraction qhov yuav tsum tau thov, thiab dimensional soj ntsuam rau daim duab kam rau ua. Kev tshuaj xyuas tsis muaj kev puas tsuaj ua ke nrog kev kuaj ultrasonic rau qhov tsis xws luag thiab suav tomography scanning ntawm cov ntu tuab, feem ntau saum toj no li 3 hli, kom paub meej tias tsis muaj thaj chaw tsis muaj kev cuam tshuam lossis tsis muaj kev sib txuas hauv network. Txhua batch ntawm hmoov, txhua lub tog raj kheej roj thiab txhua qhov txheej txheem txheej txheem tau sau tseg kom kho tuaj yeem taug qab tag nrho rau nws cov khoom siv.
Qhov Chaw Kho Txias Txias yog siv
Aluminium txias tsuag kho yog siv thoob plaws aviation, rail, zog thiab dav engineering. Compressor vaj tse, gearbox casings, lub cev twj tso kua mis, lub rooj zaum valve, lub tog raj kheej taub hau thiab cov khoom siv hluav taws xob hloov pauv txhua zaus, zoo li cov phab ntsa nyias nyias uas yuav tsum zam kom tsis txhob muaj kev cuam tshuam. Cov thev naus laus zis kuj tseem siv los ntxiv cov khoom siv rau cov khoom tshiab, piv txwv li tsim cov txheej txheem txhuas rau hauv qhov sib txawv ntawm cov substrate los yog siv cov tawv nqaij tiv thaiv corrosion rau cov casting. Cov tshuab nqa tau yooj yim tau ua haujlwm kho qhov chaw ua haujlwm: kev kho ib zaug uas yuav tsum tau ua tiav cov txheej txheem vuam thiab lub sijhawm kaw tam sim no tuaj yeem ua tiav nyob rau hauv ib qho kev hloov pauv, nrog rau kev tshaj tawm - machining tau ua ntawm qhov chaw.
Cov lus nug nquag
Q: Dab tsi yog txias txau aluminium kho siv rau?
Nws rov qab hnav, corroded los yog dimensionally undersized aluminium Cheebtsam los ntawm kev tsim cov hlau tsis melting nws, thiab nws yog siv rau vaj tse, casings, twj tso kua mis thiab valve lub cev, panels thiab tshav kub exchangers, ua raws li los ntawm machining mus rau qhov kawg loj.
Q: Vim li cas particle tshaj tawm tseem ceeb tshaj qhov kub?
Kev sib khi yog tsim los ntawm cov yas deformation ntawm qhov cuam tshuam, yog li txhua qhov khoom yuav tsum tshaj cov khoom siv tshwj xeeb tshaj tawm, nyob ib ncig ntawm 600 txog 700 m / s rau ntshiab txhuas. Hauv qab no tus nqi ntawm cov khoom rov qab thiab erode lub nto es tsis txhob adhering.
Q: Puas yog cov tshuaj tsuag txias tsis muaj zog lossis cuam tshuam lub hauv paus tivthaiv?
Vim tias qhov tso nyiaj nyob qis qis qis qis, qhov chaw tshav kub cuam tshuam me me thiab kev cuam tshuam tsis zoo, uas yog lub ntsiab kom zoo dua ntawm vuam thiab laser cladding, tshwj xeeb tshaj yog ntawm cov phab ntsa nyias.
Q: Puas yog kev kho cua sov xav tau tom qab cov tshuaj tsuag tsuag txias?
Tsis tas li, tab sis kub isostatic nias los yog cov hlau alloy tsim nyog aging voj voog kaw inter particle porosity, relieves residual stress thiab txhim kho qaug zog kev ua tau zoo, yog li nws yog ib qho ntawm cov loaded heev los yog kev nyab xeeb tseem ceeb kho.
Q: Yuav ua li cas yog cov tshuaj tsuag tsuag txias aluminium tshuaj xyuas?
Porosity raug kuaj xyuas ntawm daim coupon thiab ntawm ib feem, daim ntawv cog lus muaj zog raug txheeb xyuas nrog cov qauv ua pov thawj, kev coj ua tau lees paub los ntawm kev ntsuas tam sim no, thiab ultrasonic lossis xam tomography scanning pom cov voids sab hauv thiab cov chaw tsis muaj kev cuam tshuam.
Q: Qhov kev npaj saum npoo yuav tsum tau ua li cas?
Lub substrate yog degreased thiab ces grit blasted nrog ib tug huv abrasive tshem tawm oxide thiab tsim ib tug anchoring profile, thiab tshuaj tsuag pib nyob rau hauv ib tug tswj tuav lub sij hawm kom lub activated nto tsis re- oxidise los yog kis kab mob.
