Aluminium Alloy Casting: Cov txheej txheem tsim khoom, cov yam ntxwv thiab kev xaiv
Sep 11, 2025
Vim li cas Cast Aluminium Alloys
Aluminium alloy castings ua ke lub teeb yuag, zoo thermal thiab hluav taws xob conductivity, thiab lub peev xwm los tsim complex sab hauv geometries uas machining tsis tuaj yeem tsim kev lag luam. Feem ntau casting alloys muaj xws li A356 (Al-Si7Mg), uas yog tshav kub- kho tau thiab weldable; A380 (Al-Si8Cu3), uas muaj kev tuag zoo heev-castability; thiab ADC12, qhov siab -siab tuag casting workhorse hauv Asia. Casting txheej txheem sib txawv tsuas yog nyob rau hauv pwm cov khoom, siab, ua tau zoo kam rau ua, nto tiav, thiab ntau lawm ntim, yog li cov txheej txheem xaiv yog tus nqi -thiab- kev txiav txim zoo ntau npaum li ib tug technical.
Xuab zeb Casting
Xuab zeb casting tsim cov pwm los ntawm compacted xuab zeb sib txuas nrog av nplaum los yog cob, nrog rau ib tug qauv uas tau muab tshem tawm ua ntej pouring. Nws yog cov txheej txheem hloov tau yooj yim tshaj plaws: yuav luag txhua yam hlau, qhov loj me, thiab qhov ntau tuaj yeem tsim tau, cov cuab yeej siv tau pheej yig, thiab kev tsim qauv hloov tau yooj yim. Dimensional kam rau ua yog sib piv xoob, feem ntau ntxiv / rho tawm 0.5 mus rau 1.5 mm nyob ntawm qhov loj me, thiab qhov chaw tiav yog ntxhib, nyob ib ncig ntawm Ra 6.3 txog 25 micrometers, yog li cov yam ntxwv yuav tsum tau siv rau ntawm qhov chaw ua haujlwm. Xuab zeb castings yog qhov yooj yim rau porosity thiab suav nrog qhov tsis xws luag tshwj tsis yog tias rooj vag thiab nce siab tau ua tib zoo tsim. Nws tseem yog tus txheej txheem rau cov vaj tsev loj, cov qauv tsim, thiab cov khoom siv tsawg- ntim.
Kev nqis peev Casting
Kev nqis peev casting, tseem hu ua poob- siv quav ciab casting, tsim cov qauv siv quav ciab, coated nrog ob peb txheej ntawm refractory slurry los ua ib lub plhaub ceramic, tom qab ntawd yaj cov wax tawm thiab nchuav hlau rau hauv lub plhaub raug rho tawm haujlwm. Cov pwm tsis muaj kab sib cais, yog li nyob ze -net- cov khoom zoo nkauj nrog cov ntsiab lus tsis sib xws, cov phab ntsa nyias mus txog li 1.5 hli, thiab cov npoo zoo ntawm Ra 1.6 txog 3.2 micrometers yog ua tau. Tolerances ntawm plus/minus 0.1 mus rau 0.25 mm yog raug rau qhov me me. Tooling thiab per{11}}ib feem nqi yog siab dua xuab zeb casting, ua peev casting kev lag luam rau complex, siab - cov khoom muaj nqis nyob rau hauv aerospace, tiv thaiv, thiab cov cuab yeej kho mob uas machining txuag offset tus nqi.
Siab -Pressure Tuag Casting
Tuag casting txhaj tshuaj molten aluminium rau hauv cov pwm steel hlau ntawm kev kub ceev thiab siab, ua qhov sib xws nrog qhov zoo sib xws, du nto, thiab cov phab ntsa nyias ntawm 1 txog 4 hli. Lub sij hawm voj voog yog ntsuas nyob rau hauv vib nas this, yog li tuag casting yog txheej txheem rau loj zus tau tej cov tsheb, khoom siv, thiab electronics vaj tse; A380 thiab ADC12 yog cov qauv alloys vim lawv cov dej ntws thiab ua haujlwm kub kub tawg. Porosity los ntawm cov huab cua ntxiab yog qhov kev txwv tseem ceeb: siab- qhov chaw nruj yuav xav tau lub tshuab nqus tsev- pab tuag casting lossis impregnation tom qab, thiab cov alloys siv feem ntau tsis yog weldable los yog haum rau kev pabcuam siab kub siab tshaj li 150 degrees Celsius.
Pwm tas mus li thiab qis -Pressure Casting
Pwm tas mus li (lub ntiajteb txawj nqus tuag) casting pours hlau mus rau hauv ib tug reusable steel los yog cam khwb cia- hlau pwm nyob rau hauv lub ntiajteb txawj nqus. It produces denser, stronger parts than sand casting with better surface finish and tighter tolerances, and it works well with heat-treatable alloys such as A356. Phab ntsa thickness saum toj no li ntawm 8 hli yog qhov ua tau tsawg kawg nkaus rau kev txhim khu kev noj qab haus huv hauv lub ntiajteb txawj nqus casting, sib piv txoj cai ntawm tus ntiv tes xoo siv los ntawm ntau qhov chaw tsim khoom. Tsawg-siab casting ntxiv tswj huab cua siab kom sau cov pwm los ntawm hauv qab no, txhim kho kev noj zaub mov thiab tso cai rau nyias- phab ntsa, siab- cov khoom nruj xws li cov log tsheb; nws yog cov txheej txheem nruab nrab ntawm lub ntiajteb txawj nqus thiab tuag casting nyob rau hauv ob qho tib si nqi thiab muaj peev xwm.
Txheej txheem sib piv thiab xaiv
| Txheej txheem | Yam Ua Tau Zoo | Nto Finish Ra (um) | Min phab ntsa (mm) | Volume Fit | kwv tij Tooling Nqi |
|---|---|---|---|---|---|
| Xuab zeb casting | +/- 0.5 - 1.5 mm | 6.3 - 25 | 3 - 5 | Tsawg mus rau nruab nrab | Tsawg |
| Kev nqis peev casting | +/- 0.1 - 0.25 mm | 1.6 - 3.2 | 1.5 | Tsawg mus rau nruab nrab | Nruab nrab |
| Pwm tas mus li | +/- 0.3 - 0.8 mm | 3.2 - 6.3 | 8 (ntev) | Nruab nrab | Nruab nrab |
| High-siab tuag casting | +/- 0.1 - 0.3 mm | 0.8 - 1.6 | 1 - 4 | Siab | Siab |
| Tsawg-siab casting | +/- 0.2 - 0.5 mm | 3.2 - 6.3 | 2.5 | Nruab nrab mus rau siab | Siab |
Xaiv cov xuab zeb casting rau cov qauv, qhov loj, thiab ntim tsawg; peev casting rau complex, ze -net-puab qhov chaw nrog nyias phab ntsa; pwm mus tas li los yog qis-siab casting rau nruab nrab- ntim cov qauv uas xav tau lub zog thiab siab nruj; thiab siab- siab tuag casting rau siab- ntim, nyias- cov phab ntsa nrog nruj kam rau ua.
Tshaj tawm -Casting Operations
Feem ntau cov txheej txheem castings tau txais kev kho cua sov T6: kev daws teeb meem nyob ze 540 degrees Celsius, dej quench, thiab kev laus dag nyob ze ntawm 155 txog 175 degrees Celsius, uas kwv yees li ob npaug ntawm lub zog ntawm A356. Machining, kev ntsuas siab, thiab kev kho deg xws li anodizing, hmoov txheej, lossis chromate hloov dua siab tshiab ua raws, nyob ntawm daim ntawv thov. Kev tshuaj xyuas feem ntau suav nrog X-ray lossis xam tomography rau sab hauv porosity hauv aerospace qhov chaw, dye penetrant rau saum npoo tawg, thiab qhov ntsuas qhov ntev tiv thaiv cov qauv kev pom zoo.
FAQ
Cov txheej txheem aluminium casting qhov twg yog qhov pheej yig tshaj rau cov khoom me me?
Xuab zeb casting muaj tus nqi qis tshaj plaws thiab yog qhov pheej yig tshaj plaws rau cov qauv thiab cov khoom me me; chav tsev nqi poob nrog ntim, thiab tuag casting ua pheej yig tshaj li roughly 10,000 qhov chaw hauv ib xyoos.
Dab tsi yog qhov txawv ntawm peev casting thiab tuag casting?
Kev nqis peev casting siv lub plhaub ceramic pov tseg thiab haum rau txoj hauv kev, qis- mus rau - nruab nrab- ntim qhov chaw nrog zoo tag thiab nyias phab ntsa; tuag casting siv cov pwm tuaj yeem siv tau thiab haum rau siab - ntim qhov chaw nrog lub sij hawm voj voog ceev tab sis tus nqi siv ntau dua.
Aluminium tuag castings puas tuaj yeem kho cua sov?
Feem ntau tuag-casting alloys xws li A380 thiab ADC12 tsis yog cua sov- kho tau kom lub zog siab vim tias cov hlwv ntim roj tau ntim thaum lub sijhawm kho; Lub ntiajteb txawj nqus thiab qis-siab castings hauv A356 yog cov uas ib txwm muab kev kho T6.
Dab tsi phab ntsa thickness pom zoo rau txhuas casting?
Qhov tsawg kawg nkaus phab ntsa yog li 1 mus rau 1.5 hli rau tuag thiab peev casting, 2.5 mus rau 3 hli rau qis- siab thiab xuab zeb casting, thiab txog 8 hli los yog ntau tshaj rau lub ntiajteb txawj nqus mus tas li pwm qhov chaw kom muaj suab nrov.
Yog vim li cas A356 thiab A380 yog cov feem ntau casting alloys?
A356 muaj castability zoo heev ntxiv rau cov cua sov- kho lub zog thiab weldability rau cov khoom siv; A380 muab cov dej ntws zoo, cov khoom siv kho tshuab zoo, thiab tus nqi qis rau siab - ntim tuag castings.
Puas yog porosity zam tau hauv aluminium castings?
Cov porosity tuaj yeem raug txo kom tsawg tab sis tsis tas yuav tshem tawm: tswj cov yaj zoo, qhov rooj, thiab kev ua kom khov, siv lub tshuab nqus tsev - pab lossis qis - siab filling rau siab - nruj qhov chaw, thiab siv impregnation thaum xau yuav tsum raug cais tawm.
