Muaj zog thiab ruaj khov Deoxidation (Synergistic Effect)
Kev Ua Tus Kheej:Barium (Ba) muaj cov tshuaj lom neeg muaj zog dua rau cov pa oxygen dua li silicon, thiab cov thermodynamics txawv me ntsis dua li txhuas.
Synergy:Thaum siv ua ke hauv Si-Ba alloy, lawv tsim ibsynergistic deoxidation nyhuv. Cov khoom ntawm deoxidation yog complex compounds zoo libarium aluminosilicates(eg, xBaO·ySiO₂·zAl₂O₃).
Qhov tshwm sim:Cov tebchaw no yogqis-kwv yees, kua globulesntawm steelmaking kub. Qhov no yog qhov txiaj ntsig tseem ceeb.
Superior Inclusion Modification (Qhov Tseem Ceeb Zoo)
Qhov no yog qhov txiaj ntsig tseem ceeb tshaj plaws thiab qhov laj thawj tseem ceeb rau nws siv.
Teeb meem nrog Si / Al ib leeg:Cov khoom deoxidation los ntawm silicon lossis aluminium ib leeg (xws li SiO₂ lossis Al₂O₃) yog cov khoom, tawv, thiab refractory (siab melting point). Lawv tsim cov khoom me me uas tuaj yeem ua tau:
Clog nozzles thaum nruam casting.
Nyob twj ywm hauv cov hlau ua teeb meem, angular inclusions uas ua raws li kev ntxhov siab concentrators, txo ductility, qaug zog lub neej, thiab machinability.
Kev daws nrog Si-Ba:Cov kua, globular inclusions tsim los ntawm Si-Ba deoxidation:
Coalesce yooj yim:Cov kua dej me me ua ke rau hauv cov loj dua thiab ntab tawm ntawm cov hlau molten sai dua (txhim kho kev huv).
Tsis yog - abrasive:Lawv tsis clog casting nozzles.
Yog deformable:Yog tias lawv tseem nyob hauv cov khoom siv hlau kawg, cov mos mos, globular inclusions tsis tshua muaj kev puas tsuaj rau cov khoom siv zog dua li cov tawv tawv, angular Al₂O₃ lossis SiO₂ pawg.
Muaj txiaj ntsig Desulfurization
Barium kuj muaj kev sib raug zoo rau leej faj.
Nws txhawb kev tsim ntawmbarium sulfide (BaS)los yog complex oxysulfide, uas pab tshem tawm sulfur los ntawm yaj.
Qhov no muab ibdual deoxidation thiab desulfurization ua, ua rau cov hlau huv nrog txhim kho kev ua haujlwm kub (txo kev pheej hmoo ntawm kub luv).
Ntev ntev thiab txawm ua haujlwm (tsawg "Fade")
Barium muaj qhov kub siab dua li magnesium thiab sib txawv cov tshuaj tiv thaiv kinetics piv rau txhuas.
Nws cov tshuaj tiv thaiv nrog oxygen muaj zog tab sis me ntsis tsis nruj thiab nrawm dua li lwm cov ntsiab lus. Qhov no tuaj yeem ua rau antau gradual thiab sustained deoxidation nyhuv, txhim kho yield thiab sib xws.
Barium vapor generated tsim ib qho chaw tiv thaiv ntawm qhov chaw kho mob, txo re-oxidation.
Txo cov teeb meem cuam tshuam ntawm Residual Aluminium
Hauv ntau qib steel, tshwj xeeb tshaj yog cov uas yuav tsum tau kho cov calcium uas muaj tseeb rau kev tswj cov duab,residual aluminium (Acid Soluble Al)yuav tsum tau ua tib zoo tswj.
Sivsilicon bariumtuaj yeem txo lossis tshem tawm qhov xav tau ntawm txhuas ua tus thawj deoxidizer, yog li tsis txhob muaj teeb meem xws li kev tsim alumina ntau dhau ua ntej kho calcium.
Kev sib piv ntawm ib Glance:
| Deoxidizer | Qhov tseem ceeb tshaj | Qhov Tseem Ceeb Disadvantage | Daim Ntawv Pov Thawj Hauv Tsev Kawm Ntawv |
|---|---|---|---|
| Silicon (Si) | Tus nqi qis, tus qauv rau ntau qib. | Tsis muaj zog deoxidizer, tsim cov khoom SiO₂. | Khoom, refractory silica hais. |
| Aluminium (Al) | Muaj zog heev, txheem rau tua steel. | Cov ntaub ntawv muaj zog Al₂O₃ pawg (clog nozzles). | Khoom, tawv alumina pawg. |
| Silicon Barium (Si-Ba) | Synergistic nyhuv, ua kua inclusions, hloov inclusions, desulfurizes. | Tus nqi siab dua, siv ntau dua. | Ua kua, globular aluminosilicate globules. |
Xaus:
Covoverarching kom zoo duantawm silicon barium yog nws lub peev xwmtsim kom huv si, machinable dua, thiab siab dua - steel zoolos ntawm kev hloov cov khoom tsis zoo deoxidation rau hauv cov khoom tsis zoo, ua kua, thiab tshem tau. Nws yog ib"inclusion modifier"ntau npaum li ib tug deoxidizer.
Nws tsis yog kev hloov pauv thoob ntiaj teb rau silicon lossis aluminium vim nws tus nqi siab dua, tab sis nws yog ib qhocov cuab yeej hwmsiv rau kev siv tseem ceeb xws li:
Tshwj xeeb bar zoo (SBQ) steelsrau automotive qhov chaw.
High-qib hlau pas nrigrau springs thiab log cord.
Steels xav tau zoo heev machinability thiab qaug zog kuj.
Steels qhov twg casting kev ntseeg tau (nozzle clogging) yog ib qho kev txhawj xeeb loj.
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