Dab tsi yog qhov sib txawv ntawm kev ua haujlwm ntawm cov tshuab kub melting hauv melting sib txawv hlau?

Hauv ntau qhov kev lag luam xws li hlau ua haujlwm thiab kev tsim cov hniav nyiaj hniav kub, lub tshuab melting plays lub luag haujlwm tseem ceeb. Vim lawv lub cev thiab tshuaj lom neeg tshwj xeeb, cov hlau sib txawv muaj qhov sib txawv tseem ceeb thaum yaj los ntawm lub tshuab melting. Kev nkag siab txog qhov sib txawv no yog qhov tseem ceeb rau kev ua kom zoo dua cov txheej txheem smelting, txhim kho kev tsim khoom, thiab txhim kho cov khoom zoo.

1.Ob qhia txog cov yam ntxwv ntawm kev sib tsoo hlau

(1) Kub

Kub yog cov hlau uas muaj ductility zoo thiab tshuaj lom neeg ruaj khov, nrog lub siab melting point ntawm 1064.43 ℃. Kub muaj xim kub thiab mos zoo nkauj, thiab yog dav siv nyob rau hauv high-end teb xws li hniav nyiaj hniav kub thiab electronics. Vim nws tus nqi siab, nruj yuav tsum tau muab tso rau ntawm purity thiab poob tswj thaum lub sij hawm smelting txheej txheem.

(2) Nyiaj

Lub melting point ntawm nyiaj yog 961.78 ℃, me ntsis qis dua cov kub. Nws muaj cov conductivity zoo heev thiab thermal conductivity, thiab yog dav siv nyob rau hauv kev lag luam thiab hniav nyiaj hniav kub tsim. Silver muaj cov khoom siv tshuaj lom neeg thiab muaj ntau yam ua rau cov pa oxygen hauv huab cua thaum lub sij hawm smelting, tsim oxides.

(3) tooj liab

Lub melting point ntawm tooj liab yog hais txog 1083.4 ℃, thiab nws muaj zoo conductivity, thermal conductivity, thiab txhua yam khoom. Nws yog dav siv nyob rau hauv kev lag luam xws li hluav taws xob kev lag luam, mechanical manufacturing, thiab kev tsim kho. Tooj liab yog nquag nqus cov pa roj xws li hydrogen thaum lub sij hawm melting, uas cuam tshuam rau qhov zoo ntawm castings.

(4) Aluminium alloy

Aluminium alloy yog cov khoom siv dav siv ntau tshaj plaws ntawm cov khoom siv hlau tsis yog hlau hauv kev lag luam, nrog lub melting point feem ntau ntawm 550 ℃ thiab 650 ℃, uas txawv nyob ntawm cov alloy muaj pes tsawg leeg. Aluminium alloy muaj qhov ntom ntom, tab sis siab zog thiab zoo corrosion kuj. Cov txheej txheem melting yuav tsum tau tswj nruj ntawm qhov kev faib ua feem ntawm cov ntsiab lus alloy thiab cov kub melting.

2.Lub hauv paus ntsiab lus ntawm kev ua haujlwm thiab kev ua haujlwm ntawm lub tshuab melting thiab lawv cov kev cuam tshuam ntawm melting

Melting tshuab feem ntau siv lub hauv paus ntsiab lus ntawm electromagnetic induction los tsim induced tam sim no nyob rau hauv cov ntaub ntawv hlau los ntawm ib tug alternating magnetic teb. Lub Joule cua sov tsim los ntawm qhov tam sim no sai sai thiab melts cov hlau. Cov kev tsis sib xws xws li lub zog thiab zaus ntawm lub tshuab melting ua lub luag haujlwm tseem ceeb hauv cov nyhuv melting ntawm cov hlau sib txawv.

(1) Lub zog

Lub zog siab dua, qhov kub ntau ntawm lub tshuab melting generates ib lub sij hawm, thiab cov hlau heats sai dua, uas tuaj yeem txhim kho cov melting efficiency. Rau cov hlau xws li kub thiab tooj liab nrog cov ntsiab lus melting siab, lub tshuab hluav taws xob muaj zog yuav tsum tau ua kom tiav sai sai. Txawm li cas los xij, rau aluminium alloys nrog qis melting cov ntsiab lus, lub zog ntau dhau tuaj yeem ua rau lub zos overheating, cuam tshuam rau uniformity ntawm alloy muaj pes tsawg leeg.

(2) Ntau zaus

Qhov zaus feem ntau cuam tshuam rau qhov tob tob ntawm tam sim no hauv cov hlau. Lub tshuab melting ntau zaus yog tsim rau melting me me, nyias-walled hlau cov khoom los yog cov xwm txheej uas yuav tsum tau muaj siab melting ceev, vim hais tias high-frequency tam sim no yog concentrated nyob rau hauv cov hlau nto thiab tuaj yeem ua kom sov ntawm cov hlau. Tam sim no qhov tob tob ntawm cov tshuab melting tsawg zaus yog ntau dua, ua rau lawv tsim nyog rau cov hlau loj loj ingots. Piv txwv li, thaum melting loj pieces ntawm kub, txo qhov zaus kom tsim nyog tuaj yeem faib cov cua sov kom sib npaug hauv cov hlau, txo qhov kub ntawm qhov kub thiab oxidation.

3.Qhov kev ua tau zoo sib txawv ntawm cov tshuab kub melting hauv melting ntawm cov hlau sib txawv

(1) Melting ceev

Vim nws qhov siab melting point, kub muaj ib tug kuj qeeb melting tus nqi nyob rau hauv tib lub hwj chim thiab tej yam kev mob. Aluminium alloy muaj qhov qis melting point thiab tuaj yeem ncav cuag qhov kub thiab txias hauv lub tshuab melting, nrog lub melting ceev nrawm dua kub. Lub smelting ceev ntawm cov nyiaj thiab tooj liab yog nruab nrab ntawm ob, nyob ntawm seb lub zog ntawm lub tshuab melting thiab thawj lub xeev ntawm cov hlau.

(2) Purity tswj

Nyob rau hauv kub smelting, vim nws cov nqi siab, tsis tshua muaj siab purity yuav tsum tau. Cov tshuab kub zoo tshaj plaws tuaj yeem txo qhov sib xyaw ntawm impurities thiab ua kom lub purity ntawm kub los ntawm kev tswj qhov kub thiab txias thiab electromagnetic stirring muaj nuj nqi. Nyob rau hauv sib piv, nyiaj yog nquag oxidation thaum lub sij hawm smelting txheej txheem. Txawm hais tias kub melting tshuab tuaj yeem txo oxidation los ntawm kev sau cov roj inert rau hauv lub smelting chamber, nws tseem nyuaj rau tswj purity tshaj kub. Qhov teeb meem ntawm kev nqus pa thaum lub sij hawm tooj liab smelting yog qhov tseem ceeb, thiab kev ntsuas degassing yuav tsum tau coj los xyuas kom meej purity, txwv tsis pub nws yuav cuam tshuam rau cov khoom siv ntawm cov castings. Thaum aluminium alloy yog melted, ntxiv rau kev tswj qhov kub poob ntawm cov ntsiab lus alloy kom ntseeg tau tias muaj pes tsawg leeg, nws tseem tsim nyog los tiv thaiv cov roj nqus thiab slag suav nrog, thiab cov khoom siv melting thiab cov txheej txheem tseem nruj heev.

(3) Kev siv hluav taws xob

Feem ntau hais lus, cov hlau uas muaj cov ntsiab lus melting ntau dua siv lub zog ntau dua thaum lub sijhawm melting. Vim lawv cov ntsiab lus melting siab, kub thiab tooj liab yuav tsum muaj cov khoom siv hluav taws xob tas mus li los ntawm lub tshuab melting thaum lub sij hawm melting, uas ua rau muaj kev siv zog heev. Thiab aluminium alloy muaj cov ntsiab lus melting tsawg, xav tau lub zog tsawg dua kom ncav cuag lub xeev melting, thiab tseem muaj qis zog noj. Lub zog noj ntawm cov nyiaj yog nyob rau theem nrab. Tab sis qhov tseeb ntawm kev siv hluav taws xob kuj tseem cuam tshuam nrog rau yam xws li kev ua haujlwm ntawm lub tshuab melting thiab tus nqi ntawm melting. Kev txuag hluav taws xob thiab txuag hluav taws xob ua lub luag haujlwm tseem ceeb hauv kev txo qis kev siv hluav taws xob thaum lub sij hawm melting ntawm cov hlau sib txawv.

(4) Cov khoom siv hnav thiab tsim kua muag

Qhov poob ntawm lub tshuab melting kuj txawv thaum melting txawv hlau. Kub muaj ib qho kev ntxhib los mos thiab ua rau hnav tsawg heev ntawm lub crucible thiab lwm yam khoom ntawm lub tshuab melting. tooj liab muaj ib tug hardness ntau dua, uas ua rau kuj zoo dua yaig thiab hnav nyob rau hauv lub crucible thaum lub sij hawm melting txheej txheem, yuav tsum tau ntau check crucible cov ntaub ntawv. Thaum aluminium alloy yog yaj, vim nws cov khoom siv tshuaj lom neeg, nws tuaj yeem raug qee yam tshuaj lom neeg nrog cov khoom siv crucible, ua kom nrawm nrawm. Yog li ntawd, nws yog tsim nyog los xaiv ib tug tshwj xeeb corrosion-resistant crucible.

4. Cov lus xaus

Qhov kev ua tau zoo ntawm lub tshuab melting nws txawv heev nyob rau hauv melting ntawm cov hlau sib txawv, nrog rau ntau yam xws li melting ceev, purity tswj, zog noj, thiab cov khoom poob. Cov kev sib txawv no feem ntau yog los ntawm lub cev thiab tshuaj lom neeg ntawm cov hlau sib txawv thiab cov kev tsis sib xws ntawm lub tshuab melting nws tus kheej. Hauv kev siv cov tswv yim, cov lag luam thiab cov kws kho mob yuav tsum xaiv hom thiab kev ua haujlwm ntawm lub tshuab melting tsim nyog raws li hom thiab cov kev xav tau tshwj xeeb ntawm cov hlau yaj, thiab txhim kho cov txheej txheem melting kom ua tiav cov txheej txheem ua tau zoo, zoo, thiab tus nqi qis hlau melting. Nrog rau kev nce qib ntawm thev naus laus zis tsis tu ncua, lub tshuab melting tshuab kuj tseem niaj hnub tsim thiab tsim. Nyob rau hauv lub neej yav tom ntej, nws yuav tsum ua kom zoo dua cov nyhuv melting ntawm cov hlau sib txawv thiab ua tau raws li qhov kev thov loj hlob rau kev ua hlau hauv ntau qhov chaw.