Calcium Silicon Cored Hlau yog dab tsi?
Calcium silicon cored hlau, raws li lub npe qhia, yog cov hlau- zoo li cov khoom tsim los ntawm cov ntaub ntawv nruj nreem kaw cov tub ntxhais ntawm cov calcium uas muaj meej meej-silicon alloy hmoov nrog nyias, qis- cov pa roj carbon steel sawb ntawm lub tshuab dov.
Koj tuaj yeem xav tias nws yog ib hom "hlau noodle," nrog cov hlau "wrapper" sab nraud encasing hmoov "filling" - calcium -silium alloy.
Core Composition
Sheath: Feem ntau yog ua los ntawm qis - carbon steel sawb nrog zoo ductility thiab lub zog. Lub luag haujlwm tseem ceeb ntawm lub tsho tiv no yog:
Txhawm rau tiv thaiv cov hmoov txhuas sab hauv los ntawm ya raws thiab tawg thaum lub sijhawm thauj mus los thiab khaws cia.
Txhawm rau muab cov neeg kho tshuab muaj zog txaus thaum lub sij hawm xaim noj cov txheej txheem, tso cai rau nws yooj yim nkag mus rau slag txheej ntawm qhov chaw ntawm cov hlau molten.
Cov khoom siv tseem ceeb: Cov tub ntxhais kawm muaj cov calcium uas ua tau zoo sib xws -silicon (Si-} Ca) hmoov hmoov. Silicon thiab calcium cov ntsiab lus muaj cov tshuaj lom neeg tshwj xeeb tseem ceeb rau kev txhawb nqa cov tshuaj tiv thaiv metallurgical.
Cov yam ntxwv tseem ceeb & qhov zoo
Kev tsim cov calcium silicon cored hlau yog tsim los ntawm kev ua tau zoo thiab ua kom xa cov silicon thiab calcium tob rau hauv cov hlau molten. Nws qhov zoo yog feem ntau cuam tshuam hauv:
Txhim kho Element Yield: Cov hlau sheath cais cov calcium -silicon alloy los ntawm slag thiab xa ncaj qha mus rau thaj tsam cov tshuaj tiv thaiv sib sib zog nqus hauv cov hlau molten, txo cov oxidation poob ntawm calcium thiab silicon ua ntej lawv ncav cuag cov hlau. Cov txiaj ntsig tuaj yeem ncav cuag 15% -40% (piv rau qhov tsis tshua muaj txiaj ntsig ntawm feem ntau tsawg dua 5% thaum ntxiv calcium liab qab).
Smooth thiab Controllable Reaction: Lub cored hlau melts ntawm ib tug tej yam ceev sib sib zog nqus nyob rau hauv lub molten hlau, tso cai rau tsis tu ncua tso tawm calcium vapor, tsis txhob txaws, thiab ua rau ib tug me me, ntau yam tshuaj tiv thaiv.
Molten Steel Purification thiab Inclusion Modification: Qhov no yog qhov tseem ceeb tshaj plaws ntawm calcium silicon cored hlau.
Calcium (Ca) muaj zog deoxidizing thiab desulfurizing muaj peev xwm, reacting nrog oxygen thiab sulfur hauv cov hlau.
Qhov tseem ceeb tshaj, calcium tuaj yeem hnov mob nrog siab - melting point, muaj kev phom sij xws li Al₂O₃ (alumina) thiab SiO₂ (silica) hauv cov hlau, hloov lawv mus rau hauv qis-m melting point, globular calcium aluminates (piv txwv li, 12CaO·7Al₂O₃). Cov globular inclusions no tsis tshua muaj deform thaum dov thiab tsis dhau los ua cov ntsiab lus kev ntxhov siab, yog li txhim kho cov hlau lub neej qaug zog, toughness, corrosion kuj, thiab machinability.
Precise Micro-alloying: Ua kom muaj kev tswj xyuas meej ntawm molten steel muaj pes tsawg leeg (tshwj xeeb yog cov ntsiab lus silicon thiab calcium), tsim nyog rau kev tsim cov qib siab - cov hlau tshwj xeeb zoo.
Kev ua haujlwm yooj yim thiab txhim kho kev ua haujlwm: Cov txheej txheem kev pub hlau yog mechanized, yooj yim, rov tsim dua tshiab, thiab txo cov pa luam yeeb thiab txaws txuam nrog cov txheej txheem pub mis, txhim kho qhov chaw ua haujlwm.
Cov cheeb tsam tseem ceeb ntawm daim ntawv thov
Calcium silicon cored hlau yog dav siv nyob rau hauv cov txheej txheem metallurgy theem nrab, tshwj xeeb tshaj yog nyob rau hauv qhov chaw pub mis ntawm lub ladle. Nws feem ntau yog siv los ua cov hlau huv thiab siab - zoo tshwj xeeb steels, xws li:
Calcium Treatment of Steel: Qhov no yog daim ntawv thov tseem ceeb, siv rau kev hloov kho kev suav nrog hauv txhuas-tua hlau.
Tshwj xeeb Steel Smelting: xws li bearing steel, iav steel, pipeline steel, nkoj phaj steel, caij nplooj ntoos hlav steel, hluav taws xob steel, thiab lwm yam.
Stainless Hlau Smelting: Siv los tswj sulfide morphology thiab txhim kho cov txheej txheem.
Cast Iron Production: Hauv kev lag luam foundry, nws kuj tseem siv tau rau inoculating thiab deoxidizing molten hlau los txhim kho cov khoom cam khwb cia hlau.
Cov txheej txheem luv luv
Cov txheej txheem raug siv rau kev siv calcium silicon cored hlau hauv steelmaking yog raws li nram no:
Primary Steelmaking: Kev kho thawj zaug yog ua tiav hauv Electric Arc Rauv (EAF) lossis Basic Oxygen Furnace (BOF).
Secondary Metallurgy: Cov hlau molten raug xa mus rau Ladle Rauv (LF) rau deoxidation, desulfurization, thiab alloying.
Kev kho cov kab noj hniav: Hauv cov theem tom qab ntawm kev ua kom zoo, cov calcium silicon cored hlau yog txhaj vertically tob rau hauv lub ladle siv lub xaim feeder ntawm qhov ceev ceev (meters ib feeb).
Reaction thiab stirring / Standing: Cov hlau sheath melts tob rau hauv cov hlau molten, cov calcium -silicon alloy hmoov sai sai dissolves thiab reacts nrog cov hlau, ua deoxidation thiab kev hloov kho. Tom qab ntawd cov hlau molten raug tso cai rau sawv ntsug rau ib lub sijhawm kom tso cai rau cov khoom ntab tawm.
Nruam Casting: Cov kho, huv si molten hlau yog xa mus rau lub nruam caster yuav cam khwb cia rau hauv billets los yog slabs.
Cov ntsiab lus
Hauv kev xaus, calcium silicon cored hlau yog cov khoom siv hlau ua tau zoo thiab cov thev naus laus zis tseem ceeb hauv kev tsim cov hlau niaj hnub rau siab - cov hlau huv huv. Los ntawm txoj kev ntse lub cev encapsulation, nws daws qhov kev sib tw thoob ntiaj teb ntawm kev ntxiv calcium thaum lub sij hawm steelmaking, yog li ua kom muaj txiaj ntsig zoo thiab kev ua haujlwm ntawm cov hlau.
Yog tias koj muaj kev xav tau ntxiv rau calcium silicon cored hlau lossis lwm yam khoom ferroalloy, thov hu rau Anyang Baitengxin. Peb yuav muab koj cov khoom lag luam thiab kev pabcuam tshaj lij.
