Lub smelting uniformity thiab sib xws ntawm aluminium alloys yog qhov tseem ceeb rau qhov zoo ntawm cov khoom casting, tshwj xeeb tshaj yog thaum nws los txog rau kev ua tau zoo ntawm ingots thiab cov ntaub ntawv tiav. Thaum lub sij hawm smelting txheej txheem, muaj pes tsawg leeg ntawm aluminium alloy cov ntaub ntawv yuav tsum tau nruj me ntsis tswj kom tsis txhob muaj kev sib cais thiab grain unevenness, uas ncaj qha cuam tshuam rau lub mechanical zog, corrosion kuj thiab machinability ntawm cov khoom kawg.
Smelting uniformity yog ze ze rau cov aluminium alloys muaj pes tsawg leeg, smelting khoom, txheej txheem tsis, thiab lwm yam. Thaum lub sij hawm lub casting txheej txheem, lub solidification cwj pwm ntawm txhuas kua nyob rau hauv sib txawv kub txiav txim lub internal qauv ntawm cov khoom. Kub gradient, txias npaum li cas, thiab lwm yam yuav cuam tshuam rau lub grain loj thiab tis ntawm lub ingot, thiab ces cuam tshuam cov uniformity ntawm cov khoom. Los ntawm kev tswj cov smelting kub, homogenization kev kho mob thiab lwm yam kev txhais tau tias, cov teeb meem ntawm tivthaiv segregation thiab grain loj unevenness yuav txo tau zoo.
Lub smelting uniformity thiab sib xws ntawm aluminium alloys yog cov teeb meem tseem ceeb los xyuas kom meej qhov zoo ntawm cov khoom casting, uas yog ncaj qha cuam tshuam rau ntau yam tseem ceeb ntsuas xws li cov khoom siv, corrosion kuj thiab kev ua tau zoo ntawm castings. Uniformity thiab sib xws muaj feem xyuam nrog ntau yam xws li cov khoom faib khoom, kev tswj cov qoob loo, thiab kev coj tus cwj pwm ntawm cov hlau thaum lub sij hawm smelting.
1. Qhov tseem ceeb ntawm smelting uniformity
Nyob rau hauv cov txheej txheem smelting ntawm aluminium alloys, cov khoom sib faib ntawm cov ntsiab lus hlau yog qhov yuav tsum tau ua kom ntseeg tau cov khoom siv. Yog tias qhov ntsuas kub ntawm cov txheej txheem smelting tsis ruaj khov, cov ntsiab lus hauv cov hlau yuav cais tawm, ua rau cov khoom tsis sib xws hauv zos. Qhov tsis sib xws no yuav ua rau muaj kev sib txawv ntawm kev ua tau zoo thaum lub sij hawm tom qab solidification thiab ua cov txheej txheem, txo cov neeg kho tshuab lub zog, toughness thiab corrosion kuj ntawm cov khoom. Tsis zoo ib yam nyob rau hauv smelting yuav ua rau nkig los yog tsis muaj zog qhov chaw nyob rau hauv cov khoom, uas yog heev yooj yim mus tsim cov kab nrib pleb thiab tsis ua hauj lwm.
2. Grain refinement thaum lub sij hawm casting
Qhov loj thiab cov duab ntawm cov nplej ncaj qha cuam tshuam rau cov khoom siv hluav taws xob ntawm cov casting thiab tsim cov khoom tsis xws luag. Thaum lub sij hawm solidification txheej txheem ntawm txhuas alloy, yog hais tias cov nplej loj dhau los yog tsis sib xws, lawv feem ntau tsim undesirable microstructures xws li columnar crystals thiab feather crystals, uas tuaj yeem yooj yim ua rau lub casting tawg los yog tsim lwm yam tsis xws luag thaum siv. Txhawm rau tiv thaiv cov xwm txheej no, kev siv tshuab ua kom zoo yog feem ntau siv los txhim kho cov khoom faib tawm.
Kev siv cov refiners yog ib txoj hauv kev zoo los daws qhov teeb meem no. Hauv particular, kev taw qhia ntawm aluminium-titanium-boron refiners muaj kev txhim kho tseem ceeb ntawm microstructure ntawm aluminium alloy ingots. Los ntawm kev ntxiv cov refiners, cov nplej tuaj yeem ua kom zoo dua qub, qhov tsawg-ntau qhov microstructure ntawm cov khoom tuaj yeem ua homogenized, thiab columnar crystals thiab coarse grain qauv yuav txo tau. Kev sib xyaw ua ke ntawm TiAl₃ thiab TiB₂ nyob rau hauv aluminium-titanium-boron refiner nce tus naj npawb ntawm cov siv lead ua nuclei, txhawb kev tsim cov siv lead ua nuclei nyob rau hauv cov kua txhuas, ua rau cov nplej zoo dua thiab zoo dua qub, thiab yog li txhim kho cov khoom zoo thiab cov khoom siv hluav taws xob. qhov casting.
Thaum siv cov refiners, txhawm rau kom tau txais cov txiaj ntsig zoo tshaj plaws, nws yog ib qho tsim nyog yuav tsum tswj xyuas cov nqi thiab cov txheej txheem ntxiv. Feem ntau, tus nqi ntawm refiner ntxiv yuav tsum yog nruab nrab. Kev sib ntxiv ntau dhau yuav ua rau cov nplej ntau dhau los ua kom zoo dua qub thiab cuam tshuam rau qhov toughness ntawm cov hlau, thaum tsawg dhau yuav ua rau tsis txaus refinement. Tsis tas li ntawd, kev faib khoom ntawm cov refiner yuav tsum tsis tu ncua kom tsis txhob muaj qhov ntau dhau hauv zos lossis qhov tsis txaus hauv cov yaj, thiaj li ua kom cov nplej zoo ib yam ntawm tag nrho cov casting.
3. Kev tswj kub thiab nplawm tshuab thaum smelting
Smelting uniformity yog heev cuam tshuam los ntawm kub tswj thiab stirring txoj kev. Thaum smelting aluminium alloys, qhov kub ntawm qhov chaw faib nyob rau hauv lub yaj thiab lub xeev ntws ntawm cov hlau molten ua lub luag hauj lwm txiav txim siab nyob rau hauv lub uniformity ntawm cov muaj pes tsawg leeg. Qhov kub thiab txias dhau lawm yuav ua rau cov khoom tsis sib xws lossis cov nplej ntxhib. Los ntawm qhov tsim nyog ntsuas kub gradient, kev sib cais ntawm cov kuab tshuaj hauv cov yaj tuaj yeem txo qis.
Nyob rau tib lub sijhawm, stirring technology plays lub luag haujlwm tseem ceeb hauv cov txheej txheem smelting. Los ntawm kev siv tshuab lossis electromagnetic nplawm, qhov nro ntawm cov kua aluminium alloy tuaj yeem tawg, kom cov kua dej sib npaug ntau dua nyob rau hauv cov kua theem thiab kev tiv thaiv hauv zos ntawm cov ntsiab lus. Lub uniformity ntawm stirring ncaj qha cuam tshuam rau cov muaj pes tsawg leeg sib xws ntawm cov yaj thiab cov tom ntej solidification zoo. Tsim nyog tswj ntawm stirring ceev thiab sij hawm, tshwj xeeb tshaj yog txaus stirring tom qab ntxiv cov refiners, tuaj yeem txhim kho tag nrho cov uniformity ntawm yaj thiab xyuas kom meej cov nplej refinement nyhuv ntawm lub casting.
4. Microstructure tswj thaum lub sij hawm solidification
Cov txheej txheem solidification yog ib theem tseem ceeb uas cuam tshuam rau microstructure ntawm aluminium alloy castings. Thaum lub sij hawm solidification, qhov kub thiab txias qhov chaw faib ntawm lub yaj pem hauv ntej, tus cwj pwm ntawm solute redistribution, thiab morphological evolution ntawm cov nplej yuav muaj kev cuam tshuam loj heev rau kev ua tau zoo ntawm qhov kawg casting. Rau cov zoo aluminium alloy castings, nws yog ib qho tsim nyog los tswj tus nqi cua txias, supercooling, thiab thermodynamic lub xeev ntawm cov khoom-kua interface pem hauv ntej thaum solidification.
Thaum lub sij hawm solidification txheej txheem, ceev ceev yuav pab tsim ib tug uniform equiaxed siv lead ua qauv thiab txo qhov feem ntawm columnar crystals. Los ntawm optimizing tus nqi cua txias thiab tswj qhov kub ntawm gradient thaum lub sij hawm txias txheej txheem, lub uniformity ntawm grain qauv yuav ua tau zoo dua. Tsis tas li ntawd, rau qhov loj-section castings, cov txheej txheem kev kho cua sov homogenization feem ntau yog siv los tshem tawm qhov tsis sib xws ntawm cov txheej txheem precipitated thiab ntxiv txhim kho qhov sib xws thiab sib xws ntawm cov khoom.
5. Kev tsim cov tshuab smelting tsis tu ncua
Nyob rau hauv xyoo tas los no, nrog rau kev siv dav dav ntawm aluminium alloy cov ntaub ntawv, smelting technology kuj tseem tab tom txhim kho, tshwj xeeb tshaj yog cov kev taw qhia txog kev txawj ntse thiab kev tswj xyuas zoo. Niaj hnub nimno aluminium alloy smelting khoom them ntau thiab ntau xim rau kev tswj tsis siv neeg. Los ntawm kev tshawb nrhiav thiab tswj cov khoom siv hauv online, qhov sib xyaw, qhov kub thiab txias ntawm cov khoom ua kom zoo ntawm cov yaj tuaj yeem raug saib xyuas hauv lub sijhawm tiag tiag los xyuas kom meej qhov ruaj khov thiab sib xws ntawm cov txheej txheem smelting.
Tsis tas li ntawd, nrog rau kev txhim kho cov txheej txheem smelting, thev naus laus zis xws li cov txheej txheem smelting luv luv thiab kev kho kom zoo hauv online tau maj mam nrov. Cov thev naus laus zis no tsis yog tsuas yog txhim kho kev tsim khoom, tab sis kuj tseem txo qis kev siv hluav taws xob thiab cov nqi tsim khoom, ntxiv txhawb kev hloov kho tshiab ntawm aluminium alloy smelting technology.
Nyob rau hauv tus txheej txheem ntawm aluminium alloy smelting, uniformity thiab sib xws yog qhov tseem ceeb los xyuas kom meej cov khoom zoo. Los ntawm kev siv cov refiners, optimization ntawm kub tswj thiab nplawm tshuab, cov qauv nplej thiab muaj pes tsawg leeg tis ntawm lub ingot tuaj yeem txhim kho kom ntseeg tau tias cov casting muaj cov khoom zoo heev thiab ruaj khov. Nrog rau kev txhim kho thev naus laus zis, cov txheej txheem smelting ntawm aluminium alloy yog txav mus rau kev txawj ntse thiab kev ua kom zoo dua qub, thiab cov khoom zoo ntawm aluminium alloy casting khoom yog tsis tu ncua.
Tsis tas li ntawd, qhov sib ntxiv ntawm cov refiners yog ib qho tseem ceeb ntsuas los txhim kho cov uniformity ntawm aluminium alloy smelting. Kev siv cov txhuas-titanium-boron refiners tuaj yeem txhim kho cov qauv qis-magnification ntawm lub ingot thiab txo qhov tsis xws luag xws li cov plaub hau thiab cov kab nrib pleb. Thaum ua kom cov nplej refining nyhuv, hom refiner no tseem yuav tsum tau tswj nws cov nyiaj ntxiv thiab kev faib tawm, xyuas kom meej qhov sib xws ntawm cov muaj pes tsawg leeg, thiab zam cov agglomeration ntawm refiner. Txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhuam nws, nws yog ib qho tsim nyog yuav tsum ua kom zoo dua cov txheej txheem smelting, ua kom zoo dua cov nplej, thiab nruj me ntsis tswj cov kev faib tawm ntawm cov khoom sib xyaw.
Nyob rau hauv tus txheej txheem ntawm aluminium alloy smelting, uniformity thiab sib xws yog qhov tseem ceeb los xyuas kom meej cov khoom zoo. Los ntawm kev siv cov refiners, optimization ntawm kub tswj thiab nplawm tshuab, cov qauv nplej thiab muaj pes tsawg leeg tis ntawm cov ingot tuaj yeem txhim kho tau zoo, kom ntseeg tau tias cov casting muaj cov khoom zoo heev thiab ruaj khov zoo. Nrog rau kev txhim kho thev naus laus zis, cov txheej txheem smelting ntawm aluminium alloy yog txav mus rau kev txawj ntse thiab kev ua kom zoo, thiab txuas ntxiv txhim kho cov khoom zoo ntawm aluminium alloy casting khoom.
Post lub sij hawm: Oct-27-2024
