Niaj hnub no, tshwj xeeb-shaped aluminium rods tau maj mam siv ntau dua thiab siv dav hauv aerospace, tsheb thauj mus los, cov khoom siv hluav taws xob hauv tsev, thiab lwm yam. Txawm li cas los xij, kev tsim tshwj xeeb-zoo li aluminium rods yuav muaj qee yam impurities. Yog li yuav ua li cas tshem tawm cov impurities nyob rau hauv tshwj xeeb-shaped aluminium rods? Woolen daim ntaub? Cov nram qab no editor yuav coj koj ib txoj kev los tshem tawm impurities nyob rau hauv tshwj xeeb-shaped aluminium rods.
Ntxiv qee cov roj chlorine hauv kev tsim khoom tuaj yeem daws qhov teeb meem no. Ntxiv qee cov roj chlorine thaum lub sij hawm tsim khoom tuaj yeem chloride qee cov ntsiab lus uas muaj electronegative ntau dua li txhuas, thiab tib lub sij hawm ua rau cov txhuas rods flush nrog nitrogen. Nyob rau tib lub sijhawm, cov non-metallic inclusions thiab yaj hydrogen hauv cov kua txhuas raug tshem tawm, thiab tom qab ntawd dhau los ntawm kev tshem tawm Nruam tso cai rau cov npuas zoo nitrogen kom sib npaug sib npaug hauv cov kua txhuas kho, yog li tshem tawm impurities.
Zoo tshwj xeeb zoo li aluminium rods tsis tsuas yog txhim kho qhov zoo ntawm qhov project, tab sis kuj txuas ntxiv lub neej kev pab cuam ntawm qhov project, yog li ceev faj thaum xaiv tshwj xeeb-zoo li tus txhuas rods.
Smelting ntawm aluminium alloy
Smelting yog muab ingots rau kev ua yas. Smelting furnaces feem ntau siv cov roj hluav taws xob reverberatory furnaces los yog roj-tso reverberatory rauv, muaj peev xwm ntawm 20 mus rau 40 tons lossis ntau dua; kuj siv cov cua sov reverberatory furnaces, muaj peev xwm ntawm feem ntau txog 10 tons. Txhawm rau kom txo lub sijhawm ua haujlwm ntawm lub cub tawg, txhim kho kev ua haujlwm ntawm melting efficiency, thiab txo cov pa nqus thiab oxide zaj duab xis kev koom tes, tilting sab saum toj-loading ncig furnaces tau saws nyob rau hauv kev lag luam. Nws yog qhov zoo tshaj plaws los siv cov cuab yeej tshuaj ntsuam xyuas sai los soj ntsuam cov alloy muaj pes tsawg leeg thaum lub sij hawm smelting thiab ua kom raws sijhawm. Txhawm rau kom ntseeg tau qhov purity ntawm yaj, tiv thaiv cov pa phem ntawm cov pa phem thiab tswj cov tshuaj muaj pes tsawg leeg, ntxiv rau kom txo lub sijhawm smelting kom ntau li ntau tau, nws raug nquahu kom npog nws nrog powdery flux feem ntau ntawm cov poov tshuaj chloride thiab sodium. tshuaj chloride. Qhov dav dav npaum li cas yog 0.4 txog 0.4% ntawm qhov hnyav ntawm tus nqi. 2%. Lub melting kub feem ntau yog tswj ntawm 700 ~ 750 degree.
Cov hlau yaj kuj tseem yuav tsum tau ua kom zoo dua qub thiab lim kom tshem tawm cov pa phem hydrogen thiab cov khoom tsis yog hlau hauv cov hlau los txhim kho cov purity ntawm cov hlau. Refining feem ntau yog siv cov khoom ua kom zoo los yog cov khoom siv roj ua kom zoo. Cov khoom ua kom zoo yog feem ntau ua raws li cov tshuaj chlorine ntsev, thiab cov tshuaj ua kom zoo uas siv hexachloroethane es tsis txhob siv cov chlorine ntsev. Thaum ntxov, chlorine nquag siv los ua cov roj refining tus neeg sawv cev. Txawm hais tias cov nyhuv purification zoo, nws ua rau muaj kuab paug ib puag ncig loj. Yog li ntawd, nitrogen-chlorine sib xyaw roj, inert gas thiab peb-gas refining tus neeg sawv cev tau tsim, uas muaj cov txiaj ntsig zoo dua. Txhawm rau kom ua tiav cov txiaj ntsig zoo, cov pa oxygen thiab cov dej noo hauv cov pa roj refining feem ntau yuav tsum tsawg dua 0.03% thiab 0.3 g / m3 raws li. Lub tshuab nqus tsev dynamic degassing kuj muaj qhov zoo degassing thiab sodium tshem tawm cov teebmeem.
Kev lim dej yog kom dhau cov hlau molten los ntawm lub lim ua los ntawm cov khoom nruab nrab lossis cov khoom siv kom tshem tawm cov kev cuam tshuam hauv cov yaj. iav mesh, microporous ceramic raj thiab daim hlau, thiab alumina hais feem ntau yog siv los ua lub txaj lim rau kev pom. Hluav taws xob flux refining thiab flux txheej pom kuj siv tau.
