FERRO Silicon magnesium alloysPuas yog cov alloys nrog hlau (FE), silicon (si), thiab magnesium (mg) raws li lawv cov core core. Qee qib kawm muaj lub ntiaj teb tsawg (xws li CE thiab LA). Lawv cov khoom tseem ceeb txhawb lawv cov multifununctionality:
Kev sib xyaw ua ke:Si 40% -50%, mg 5% -10%, Fe tshuav li cas, tsis muaj kev sib npaug li 0.05%, p tsawg dua lossis sib npaug nrog 0.04%;
Lub cev lub cev:Melting taw tes 1100-1200 degree, ceev 6.8-7.0 g / cmular (loj 5-30 hli), yooj yim tawg ntawm cov kub;
Cov ntsiab lus zoo:Cov nyhuv synergistic ntawm silicon thiab magnesium muab ntau txoj haujlwm suav nrog deoxidation, ua rau nws muaj peev xwm ntau dua thiab qis dua li ib qho kev sib ntxiv.
Core applicages ntawm fesimg alloys hauv metallurgy
(1) Siab {{- effectic deoxidation: txhim kho cov hlau purity thiab txo cov khoom tsis xws luag
Mechanism ntawm Kev Ua:
Ob leeg Silicon thiab Magnesium muaj cov kev ua kom muaj deseoxidizing. Lawv xam nrog feo hauv Molten Steel (Si {{}}} → sio₂ {fe; feo → Mgo. Lub txiaj ntsig sio₂ thiab Mgo muaj ntau dua qis dua Molten hlau, ua rau lawv yooj yim kom ntab thiab muab tshem tawm nrog slag. Tsis tas li ntawd, Mgo tuaj yeem tsim qhov qis {{7} yaj {{point) nrog sio₂, txhim kho tus adsorption muaj peev xwm.
Quantitive nyhuv:
Thaum qhov nyiaj ntxiv yog 0.2% -0.5% ntawm Molten cov ntsiab lus ntawm Molten Steel muaj peev xwm txo ntawm Molten Steel loj tuaj yeem txo tau ntawm Molten Steel tau txo li ntawm Ferrosilicon ib leeg.
Cov ntaub ntawv tsim nyog:
Pre - deoxidation lossis deoxidation zaum kawg hauv converter thiab hluav taws xob arc rauve - Cov qauv hlau zoo qauv thiab alloy.
(2) Lub taub hau desulfurnurization: txo txoj kev pheej hmoo ntawm cov hlau kub brittleness
Mechanism ntawm Kev Ua:
Magnesium muaj kev muaj zog muaj zog rau cov leej txiv leej tub, uas yog insoluble hauv Molten Steel thiab yooj yim tshem tawm nrog SLAG sedimentation; Lub ntiaj teb tsawg (xws li AS CE) tuaj yeem pab hauv Desulfurization, tsim cov CE₂s₃, txuas ntxiv txhim kho kev ua haujlwm tau zoo.
Quantitive nyhuv:
Thaum qhov nyiaj ntxiv yog 0.3% -0.6%, cov neeg Sulfur cov ntsiab lus hauv Molten hlau tuaj yeem raug txo los ntawm 0.05% rau hauv qab 0.01%, nrog tus nqi desulfurization ntau dua 80%; Hauv cov kav hlau cadile ntau lawm, cov neeg Sulfur Cov Ntsiab Lus Tom qab Desulfurization yog tsawg dua lossis sib npaug ntawm cov nyiaj hauv Inhibitions ntawm sulphur ntawm graphite spheroidation.
Cov nqi tseem ceeb:
Txo qhov kub ua kom sov hauv cov hlau, txhim kho kev ua haujlwm vuam thiab ua kom huv, thiab nthuav tawm cov kev pabcuam lub neej ntawm cov hlau.
(3) precision alloing: ua kom zoo dua hlau tshuab cov khoom
Syneroistic muaj zog zuj zus tuaj:
Silicon dissolves rau hauv cov hlau lattro, ua rau muaj kev sib txawv thiab txhim kho lub zog thiab hardness; Magnesium ua kom qab zib nplej (grain loj txo qis los ntawm 60μm txog 30-40μm), txhim kho kev muaj zog thiab kev muaj zog; Tsis tshua muaj lub ntiaj teb uas tsis tshua muaj huv cov ciaj ciam, txhawb kev txhim kho corrosion ntxiv thiab nkees ua yeeb yam.
Daim ntawv thov ntawm cov hlau sib txawv:
Tsawg -} allloy high-} lub zog steel:Ntxiv 0.4%- 0.8%} 0.8% alloy nce tensile lub zog los ntawm 10%, thiab elongation ntau dua los yog sib npaug rau 20%;
Thaum tshav kub kub - tsis kam hlau:Silicon thiab magnesium synergistically txhim kho siab high - qhov kub thiab txias ruaj khov; Ntawm 600 degree, lub zog khaws cia zog nce los ntawm 70% mus tshaj 85%, haum rau Boiler thiab Kiln Cheebtsam;
Hnav - tsis kam hlau:Silicon Ferro Magnesium alloy cov ntawv nyuaj taw theem (xws li mg₂si) nyob rau hauv tus hlau qauv, txhim kho cov coj tsis kam los ntawm 30%, haum rau hnav-resistant tshuab.
(4) Siab {- Kev ua tau zoo Inoculation: txhim kho microstructure thiab cov khoom ntawm cov khoom siv
Mechanism ntawm Kev Ua:
Hauv kev cam khwb cia cam khwb cia, silica magnesium ferro alloy, los ntawm flakingization graphite fains (los ntawm cov txheej txheem flakitemation (los ntawm cov kab ke ntawm cov khoom siv (los ntawm cov qauv flakication), thiab txo cov txheej txheem rau cov qauv tshiab rau dawb pov tseg.
Quantitive nyhuv:
Hauv cov kav hlau cadile ntau lawm, yog 0.8% {}}}}}}}}}}}}}}} Cov nqi seem ntawm cov nyom-cov duab ua ke (xws li cov cav ntoo) txo qis los ntawm 10% mus rau hauv qab 3%.
Tsim nyog thov teev npe:
Casting ntawm Grey cam khwb cia hlau thiab cov hlau xeb, tshwj xeeb yog tsim nyog rau cov khoom siv ua kom tau zoo thiab cov txheej txheem sib txawv.
(5) Ua kom zoo rau kev ua yeeb yaj kiab: Txhim kho cov molten forming zoo
Mechanism ntawm Kev Ua:
Magnesium ferrosilicon alloys tuaj yeem txo cov npoo nro ntawm Molten Steel / Hlau, tsawg dua tsawg dua ntawm 15% thiab kev txhim kho muaj peev xwm.
Cov nqi tseem ceeb:
Ua rau cov molten hlau yooj yim dua los sau cov pwm sib txawv, txo cov khoom siv tsis zoo thiab "txias kaw" thiab "txias kaw qhov tseeb thiab nto tiav ntawm cov nrum; Ib txhij, nws txhawb nqa cov flotation ntawm suav nrog, ntxiv txhim kho cov hlau purity.
Xaiv thiab Siv Tswj Xyuas Cov Ntsiab Lus Ntawm Silicon - Magnesium alloys
(1) Xaiv Logic: phim cov qib raws li cov xwm txheej
| Daim Ntawv Thov Kev Pab Cuam | Pom zoo cov hom qib | Cov kev yuav tsum muaj (SI / MG) | Cov ntsiab lus tseem ceeb |
| Deagidation thiab desulfurization nyob rau hauv dog dig steelmaking | Tsawg magnesium hom (Fesimg5-6) | 45%-50%/5%-6% | Tus nqi sib npaug, haum rau cov qib dav hlau |
| Zas cov hlau inoculation rau spheridees | Nruab nrab magnesium hom (Fesimg8-10) | 40%-45%/8%-10% | Zoo spheroidization zoo nyhuv, zoo heev graphite morphology |
| Siab -}} allork kawg alloy steel, Precision Castings | Ntiaj teb tsis tshua muaj (FESIMGREGRE) | 42% -48%% / 7% -9%, Re 0.5% | Huv thaj tsam sib cog qoob loo rau kev ua tau zoo dua |
(2) Kev Siv Kev Pab Tiv Thaiv
Ntsej Muag Dosage:Ntau dhau lawm ntxiv tau yooj yim ua rau cov hlau embrittlement (piv txwv li, ntau yam cov ntsiab lus magnesium txo qhov kev cuam tshuam nyuaj ntawm cov hlau los ntawm ntau tshaj 20%). Yuav tsum muaj kev xam tau raws li kev ua tau zoo yuav tsum tau ua.
Sij hawm ntawm ntxiv:Ntxiv thaum lub sij hawm tapping txheej txheem hauv steelmaking stathmaking; Ntxiv 1 {- 3 feeb ua ntej pouring hauv nrum kom tsis txhob ua ntej ntxiv ua rau magnesium Hlawv.
Kev Cia Cai Cia:Khaws rau hauv ib puag ncig qhuav, kaw ib puag ncig kom tsis txhob noo oxidation (oxidation ua rau mgo zaj duab xis, txo kev ua yeeb yaj kiab mgo, txo kev ua yeeb yaj kiab). Lub sijhawm cia yuav tsum tsis pub tshaj 6 lub hlis.
