Covaluminium tooj dagseries yog ntau nyuaj, thiab ib co ntawm cov complex txhuas tooj dag muaj peb thiab plaub alloying ntsiab xws li manganese, npib tsib xee, silicon, cobalt thiab arsenic.HAl66-6-3-2 thiab HAl61-4-3-1, uas muaj ntau alloying ntsiab, yog alloys muaj li ntawm rau lub ntsiab, thiab ib co ntawm lawv yog complex-processed txhuas tooj dag los ntawm tshwj xeeb-zoo li tus casting alloys.Cov alloys sib txawv yuav muaj qhov sib txawv ntawm cov khoom sib txawv thiab yog li ntawd yuav tsum muaj cov txheej txheem sib txawv.
Ua ntej ntawm tag nrho cov, txhuas tooj dag yog yooj yim rau "ua npuas ncauj" thaum lub sij hawm smelting txheej txheem thiab yog yooj yim kis los ntawm txhuas los yog lwm yam hlau oxide inclusions.Cov txheej txheem smelting tsim nyog yuav tsum muaj qee yam kev tiv thaiv.Yog tias muaj oxide zaj duab xis ntawm txhuas nyob rau saum npoo ntawm cov yaj, nws tuaj yeem tiv thaiv cov yaj mus rau ib qho twg, thiab tsis tas yuav ntxiv cov npog npog thaum lub sij hawm melting.
Kev soj ntsuam theoretical: Thaum ntxiv zinc rau lub pas dej molten tiv thaiv los ntawm Al2O3 zaj duab xis, volatilization poob ntawm zinc tuaj yeem txo.Nyob rau hauv qhov tseeb, txij li thaum lub boiling ntawm zinc yuav ua puas lub oxide zaj duab xis, tsuas yog thaum ib tug haum flux yog siv, uas yog, lub yaj yuav muaj kev ruaj ntseg tiv thaiv ntau dua, qhov burning poob ntawm zinc yuav zoo zam los yog txo.Cryolite tau dhau los ua ib qho tseem ceeb thiab tseem ceeb hauv cov dej ntws siv rau smelting aluminium brass.Aluminium-brass yaj yuav tsum tsis txhob overheated los tiv thaiv cov yaj ntawm oxidizing thiab nqus tau ntau.Yog hais tias cov roj cov ntsiab lus nyob rau hauv lub yaj yog siab heev, koj muaj peev xwm xaiv flux kev pab them nqi rau refining, los yog siv inert gas refining, nrog rau re-fluxing thiab rov refining ua ntej pouring, thiab siv ib tug tswb hub los nias chloride ntsev rau hauv lub yaj rau yaj refining txoj kev.Lub siab melting point alloy ntsiab xws li hlau, manganese, silicon, thiab lwm yam nyob rau hauv complex txhuas tooj dag yuav tsum tau ntxiv nyob rau hauv daim ntawv ntawm Cu-Fe, Cu-Mn thiab lwm yam intermediate alloys.
Feem ntau, cov nqi siv ntau thiab tooj liab yuav tsum tau muab ntxiv rau hauv qhov cub ua ntej thiab yaj, cov nqi sib faib ua kom zoo tuaj yeem ntxiv ncaj qha rau cov yaj, thiab zinc ntxiv rau qhov kawg ntawm smelting.Thaum cov hlau ntshiab siv los ua tus nqi, lawv yuav tsum tau deoxidized nrog phosphorus tom qab lawv melting, ua raws li manganese (Cu-Mn), hlau (Cu-Fe), ces txhuas, thiab thaum kawg zinc.Nyob rau hauv lub complex aluminium tooj dag HAl66-6-3-2, cov ntsiab lus hlau yuav tsum tau tswj ntawm 2% ~ 3%, thiab cov ntsiab lus manganese yuav tsum tau tswj ntawm li 3%.Txwv tsis pub, thaum lawv cov ntsiab lus siab dhau lawm, qee cov khoom ntawm cov hlau yuav cuam tshuam tsis zoo.Vim tias qhov qis qis ntawm txhuas, yog tias melt tsis yog stirred kom huv si, nws yuav ua rau tsis muaj tshuaj lom neeg siv tshuaj.Thaum muaj qhov hloov pauv hloov pauv hauv lub qhov cub, feem ntau aluminium thiab ib feem ntawm tooj liab tuaj yeem muab ntxiv ua ntej, thiab tom qab ntawd zinc tuaj yeem ntxiv tom qab lawv melted.Thaum aluminium ntxiv, cov cua kub ntau tuaj yeem tso tawm vim qhov sib xyaw ntawm tooj liab thiab txhuas.Cov txheej txheem exothermic tuaj yeem siv los ua kom cov txheej txheem melting, tab sis yog tias kev ua haujlwm tsis ua haujlwm zoo, cov tshuaj tiv thaiv exothermic hnyav tuaj yeem ua rau lub zos kub ntawm lub pas dej molten siab dhau lawm, ua rau muaj kev kub ntxhov ntawm zinc, thiab thaum muaj mob hnyav, cov nplaim taws yuav raug tshem tawm ntawm lub cub tawg.Qhov kub ntawm smelting HAl67-2.5 feem ntau yog 1000 ~ 1100 ℃, thiab qhov kub ntawm smelting HAl60-1-1, HAl59-3-2, Hal66-6-6-2 feem ntau yog 1080 ~ 1120 ℃, thiab qhov kub thiab txias yuav tsum tau siv ntau li ntau tau.Melting kub.
Lub sij hawm xa tuaj: Plaub Hlis-07-2022