Ferro silicon nitride (FeSiN) yog nitrided ferroalloy ua los ntawm reacting ferrosilicon hmoov nrog nitrogen ntawm qhov kub thiab txias, yog li ntawd ib feem ntawm silicon hloov dua siab tshiab rau hauv silicon nitride (Si3N4) thaum cov hlau tseem yog ib tug hlau binder. Nws yog muab los ua hmoov, granulate los yog briquette thiab yuav ntawm cov ntsiab lus nitrogen es tsis yog cov ntsiab lus ntawm silicon, uas yog qhov cais nws los ntawm cov ferrosilicon zoo tib yam.
Vim hais tias cov nitrogen yog nqa nyob rau hauv ib tug ruaj khov compound es tsis yog nyob rau hauv ib tug roj los yog ib tug hygroscopic ntsev, FeSiN yuav muab khaws cia rau hauv ib tug ib txwm warehouse thiab ntxiv rau lub ladle los yog lub cub tawg yam tsis muaj qhov poob thiab fume uas nrog nitrogen gas purging los yog nitrided manganese ntxiv.
Hom tshuaj muaj pes tsawg leeg
Kev sib xyaw yog nyob ntawm txoj kev nitridation thiab nyob ntawm qib xaj. Ib tus neeg sawv cev kev tshuaj xyuas kev lag luam npog plaub yam hauv qab no; Qhov sib npaug yog tsim los ntawm cov kab txhuas txhuas, calcium thiab oxygen.
| Cheebtsam | Yam ntau yam | Muaj nuj nqi hauv cov khoom |
|---|---|---|
| Silicon nitride, Si3N4 | 40–50% | Carrier ntawm kev sib xyaw nitrogen, cua sov- theem ruaj khov |
| Hlau, Fe | 35–45% | Hlau binder, txhim kho kev ntws thiab txo cov plua plav |
| Dawb silicon, Si | 10–20% | Deoxidation thiab silicon alloying |
| Cov ntsiab lus (Al, Ca, O) | seem | Residuals los ntawm raw khoom thiab lub cub tawg nitriding |
Nitrogen cov ntsiab lus ua raws ncaj qha los ntawm Si3N4 feem, txij li silicon nitride muaj txog 40% nitrogen los ntawm huab hwm coj. Thaum Si3N4 tso nyiaj rau 40-50% ntawm cov khoom, cov ntsiab lus nitrogen ua ke yog li ntawd poob rau hauv thaj tsam li ntawm 16-20%. Cov qib feem ntau raug muag tawm tsam qhov lav qhov tsawg kawg nkaus nitrogen, thiab tus neeg muag khoom daim ntawv pov thawj yuav tsum muaj cov nitrogen, dawb silicon thiab tag nrho cov silicon cais.
Nws txawv li cas ntawm Standard Ferrosilicon
Ordinary ferrosilicon yog txhais los ntawm silicon cov ntsiab lus thiab impurity txwv nyob rau hauv ASTM A100 / A100M thiab GB / T 2272, thiab tsis txhob txwm nitrogen. Hauv FeSiN ib feem tseem ceeb ntawm silicon twb tau sib txuas nrog nitrogen, yog li cov khoom coj txawv txawv hauv chav da dej: nws tsis yooj yim yaj thiab tsa silicon, nws tso nitrogen rau hauv txoj kev tswj hwm raws li theem nitride tawg. Qhov sib txawv ntawd yog vim li cas FeSiN tau teev tseg raws li nitriding thiab cov qauv- tswj cov khoom ntxiv es tsis yog deoxidiser.
Lub luag hauj lwm ntawm Txhua Cheebtsam hauv Steel Da Dej
Silicon nitride.Ua raws li tus pub nitrogen. Nitrogen coj mus rau hauv kev daws teeb meem txhawb kev tsim cov carbonitrides zoo thiab nitrides, refines raws li - nrum grain qauv thiab tsa lub zog ntawm cov tiav lawm. Txoj kev nitride kuj tseem muab cov nitrogen zoo dua li cov pa purging, vim hais tias cov nitrogen nkag mus rau hauv cov yaj thaum cov particle dissolves es tsis dhau los ntawm cov slag.
Hlau.Dilutes cov theem nitride, ua kom cov particle ntom txaus kom nkag mus rau txheej slag, thiab txhim kho flowability thaum lub sij hawm pneumatic txhaj.
Dawb silicon.Deoxidises lub da dej thiab ntxiv rau silicon specification ntawm lub tshav kub. Rau cov hlau nplaum thiab rau qee cov qib stainless, cov silicon dawb yog qhov zoo dua; rau qis-silicon steels cov ntsiab lus dawb silicon yuav tsum raug txwv.
Aluminium thiab calcium.Tam sim no tsuas yog nyob rau hauv seem seem; lawv cuam tshuam cov mob slag thiab suav nrog chemistry, yog li lawv feem ntau capped nyob rau hauv kev yuav khoom specification.
Qib, Sizing thiab Applications
FeSiN feem ntau raug txiav txim hauv peb pawg loj: 0-1 hli rau briquetted thiab phom sib tov, 1-3 hli rau lub ntiajteb txawj nqus thiab pneumatic txhaj tshuaj, thiab hmoov zoo rau refractory bonding thiab coatings. Cov ntawv thov muaj xws li nitrogen alloying ntawm stainless thiab duplex steels, cov qauv tswj nyob rau hauv ductile thiab compacted graphite hlau, bonding ntawm tundish thiab ladle refractories, thiab gunning kho raug rau molten hlau.
Kev Ntsuam Xyuas thiab Kev Tswj Xyuas Zoo
Qhov kev ntsuam xyuas tseem ceeb yog kev txiav txim siab nitrogen, feem ntau yog ua los ntawm inert gas fusion txoj kev piav qhia hauv ASTM E1019, nrog silicon thiab hlau txiav txim siab los ntawm ntub chemistry, X-ray fluorescence lossis inductively co plasma. Vim tias FeSiN absorbs noo noo tsuas yog maj mam, qhov poob ntawm kev ziab ziab yog qhov kev kuaj xyuas muaj txiaj ntsig uas ntau tau muab khaws cia kom raug thiab tsis raug rau qhov chaw ntub dej. Qhov loj me me faib tau raug txheeb xyuas nrog sieves rau ASTM E11, thiab qib briquette yuav tsum tau kuaj xyuas kom muaj zog ntsuab thiab kev poob qis.
Cov lus nug nquag
Q:Dab tsi yog qhov muaj pes tsawg leeg ntawm ferro silicon nitride?
A: Nws yog ib qho sib xyaw ntawm 40-50% silicon nitride, 35-45% hlau, 10-20% silicon dawb thiab kab txhuas, calcium thiab oxygen, muab cov ntsiab lus nitrogen sib xyaw ntawm 16-20%.
Q:Puas yog ferro silicon nitride tib yam li ferrosilicon?
A: Tsis yog. Tus qauv ferrosilicon, txhais los ntawm ASTM A100 / A100M thiab GB / T 2272, tsis muaj cov khoom siv nitrogen, thaum FeSiN nqa nitrogen bonded li silicon nitride thiab muag ntawm cov ntsiab lus nitrogen.
Q:Yuav ntsuas nitrogen hauv FeSiN li cas?
A: Cov txheej txheem inert gas fusion ntawm ASTM E1019 feem ntau yog siv, txhawb kev txiav txim siab ntawm silicon thiab hlau thiab ya raws los yog poob - ntawm - ziab kom paub tseeb tias qhov ntau tsis tau nqus dej.
Q:Cov qib twg ntawm FeSiN muaj?
A: Cov neeg muag khoom hais tawm tsam qhov lav qhov tsawg kawg nkaus nitrogen, feem ntau yog li ntawm 15% thiab 25% ua ke nitrogen, hauv cov hmoov, granulate lossis briquette daim ntawv.
Q:Vim li cas cov ntsiab lus hlau tseem ceeb?
A: Hlau ua raws li kev sib khi thiab ua rau cov khoom hnyav dua thiab yooj yim rau kev txhaj tshuaj los ntawm txheej slag. Cov ntsiab lus hlau ntau dua txhim kho kev tuav, thaum cov ntsiab lus ntau dua silicon nitride ua kom cov nitrogen xa mus rau ib tonne.
Q:Qhov luaj li cas yuav tsum tau txiav txim rau ladle txhaj tshuaj?
A: 1-3 hli granulate yog ib txwm xaiv rau pneumatic txhaj thiab 0-1 hli rau briquettes thiab refractory mixes. Sizing yuav tsum tau ntawv pov thawj nrog ASTM E11 xeem sieves.