Ferrosilicon rau casting yog ib qho tshwj xeeb alloy tsim tshwj xeeb rau kev tsim cov cam khwb cia hlau thiab cam khwb cia hlau. Nws feem ntau siv 75% silicon cov ntsiab lus raws li nws lub hauv paus, thiab ua tiav cov txiaj ntsig zoo ntawm metallurgical los ntawm kev tswj xyuas cov kab ke xws li txhuas, calcium, thiab manganese, thiab kev ua kom zoo ntawm qhov loj me.

Nyob rau hauv kev lag luam casting, nws plays lub luag hauj lwm irreplaceable:

Raws li ib tug inoculant:Ntxiv ib qho me me ntawm ferrosilicon rau cov hlau molten tuaj yeem tsim ntau silicon -nplua nuj microscopic heterogeneous nuclei, txhawb kev tsim ntawm hom A graphite, refining eutectic pawg, thiab txo qhov nyiam ntawm cov hlau dawb, yog li txhim kho cov tshuab thiab machinability ntawm castings.

Raws li cov khoom siv spheroidizing tus neeg sawv cev:Nws yog cov khoom siv tseem ceeb rau kev tsim cov tshuaj spheroidizing rau lub ntiaj teb tsis tshua muaj magnesium ferrosilicon alloys. Cov silicon hauv spheroidizing tus neeg sawv cev feem ntau yog los ntawm siab - zoo ferrosilicon rau casting.

Raws li ib tug deoxidizer rau cam khwb cia hlau:Siv rau qhov kawg deoxidation hauv cam khwb cia hlau smelting, kho cov ntsiab lus silicon ntawm cov hlau molten kom ntseeg tau tias cov khoom siv casting ua tau raws li cov qauv.

Covferro siliconqhov ntau thiab tsawg siv nyob rau hauv foundries mas suav nrog1-3 hlithiab2-8 hli. Cov qhov loj me no tuaj yeem ua tau raws li qhov xav tau ntawm cov txheej txheem casting thiab xyuas kom meej qhov kev vam meej ntawm cov txheej txheem casting.

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Tshuaj muaj pes tsawg leeg

Qib	Tshuaj muaj pes tsawg leeg						Hom grain loj (feem ntau siv hauv casting)	Daim ntawv thov
	Si	Al	Ca	Mn	C	P/S
FeSi75Al0.5-A	74.0-80.0	Tsawg dua los yog sib npaug li 0.5	Tsawg dua los yog sib npaug rau 1.0	Tsawg dua los yog sib npaug li 0.4	Tsawg dua los yog sib npaug li 0.1	Tswj nruj	1-3mm / 2-8mm	High-kawg hlau / grey hlau inoculant:Tsawg- alumina tswj txo cov slag porosity tsis xws luag; siv nyob rau hauv tseem ceeb castings rau cua zog, nuclear zog, thiab lwm yam.
FeSi75Al1.0-A	74.0-80.0	Tsawg dua los yog sib npaug rau 1.0	Tsawg dua los yog sib npaug rau 1.0	Tsawg dua los yog sib npaug li 0.4	Tsawg dua los yog sib npaug li 0.1	Tswj nruj	1-3mm / 3-8mm	General -lub hom phiaj grey hlau / ductile hlau inoculant:Tus nqi siab -kev ua tau zoo; zoo txhim kho graphite morphology thiab txo cov hlau cam khwb cia dawb.
FeSi75Al1.5-A	74.0-80.0	Tsawg dua los yog sib npaug li 1.5	Tsawg dua los yog sib npaug rau 1.0	Tsawg dua los yog sib npaug li 0.4	Tsawg dua los yog sib npaug li 0.1	Tswj nruj	3-8mm / 8-15mm	Loj / tuab ntu inoculant:me ntsis coarser particle loj prolongs inoculation fading lub sij hawm; siv nyob rau hauv hnyav castings.
FeSi 75 (B级)	72.0-80.0	协商	Tsawg dua los yog sib npaug rau 1.0	Tsawg dua los yog sib npaug li 0.5	Tsawg dua los yog sib npaug li 0.2	Kev niaj hnub	10-50mm / 10-100mm	Raw khoom rau spheroidizing tus neeg sawv cev ntau lawm:Siv los ua cov khoom siv hauv smelting tsawg lub ntiaj teb magnesium ferrosilicon alloys.
FeSi65	65.0-72.0	-	-	Tsawg dua lossis sib npaug li 0.6	-	Kev niaj hnub	10-60 hli	Cam khwb cia hlau deoxidizer:Siv rau qhov kawg deoxidation thiab muaj pes tsawg leeg kho ntawm molten steel nyob rau hauv tus nqi - nqi xwm txheej.
FeSi hmoov	72.0-80.0	Tsawg dua los yog sib npaug li 1.5	Tsawg dua los yog sib npaug rau 1.0	Tsawg dua los yog sib npaug li 0.5	Tsawg dua los yog sib npaug li 0.2	Kev niaj hnub	0-1mm / 40-200 hli	Exothermic riser / npog tus neeg sawv cev:Siv cov exothermic oxidation ntawm ferrosilicon los txhim kho kev pub mis.

Lub luag haujlwm ntawm ferrosilicon

Ua kom lub hardness thiab hnav tsis kam ntawm castings:

Cov ntsiab lus ntawm silicon nyob rau hauv ferro silicon alloy yog qhov siab, uas tuaj yeem txhim kho lub hardness thiab hnav tsis kam ntawm castings, ua castings muaj kev ua haujlwm zoo dua qub thiab kev pabcuam lub neej.

Alloying:

FeSi alloy tseem muaj lwm yam alloying ntsiab lus, xws li manganese, tungsten, vanadium thiab chromium, uas tuaj yeem tsim cov hlau thiab silicon los txhim kho lub zog thiab tawv ntawm castings, yog li ua tau raws li kev siv ntau dua.

Dilution thiab mildness:

Qhov sib ntxiv ntawm cam khwb cia ferrosilicon tuaj yeem dilute ntau lwm yam alloying, xws li npib tsib xee, cobalt thiab titanium, uas tuaj yeem ua rau qee yam khoom ntawm castings, tab sis kuj nce nqi. Qhov sib ntxiv ntawm ferro silicon tuaj yeem txo cov nqi thiab txo cov teebmeem ntawm lwm cov khoom siv alloying.

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Core metallurgical functions thiab empirical pov thawj ntawm cam khwb cia ferrosilicon

1. Enhanced Inoculation, Optimized Graphite Structure

Txoj Cai:

Silicon thiab cov lej ntawm txhuas thiab calcium hauv cam khwb cia ferrosilicon tsim ntau submicroscopic, siab -silicon-cov ntsiab lus heterogeneous nuclei hauv cov hlau molten. Cov nuclei no muab qhov zoo tshaj plaws substrate rau graphite nag lossis daus thiab kev loj hlob, txhawb kev tsim ntawm hom A graphite, inhibiting hom D thiab E supercooled graphite, thiab refining eutectic pawg.

Cov nyhuv:

Cam khwb cia hlau kho nrog inoculation nthuav tawm 10-20% nce hauv tensile lub zog, txhim kho hardness uniformity, thiab ho txhim kho machinability.

2. Lub luag haujlwm substrate, kom ntseeg tau tias Spheroidization nyhuv

Txoj Cai:

Nyob rau hauv smelting ntawm tsawg lub ntiaj teb magnesium ferrosilicon spheroidizing cov neeg ua haujlwm, cam khwb cia ferrosilicon yog thawj qhov chaw thiab cov cab kuj ntawm silicon. Nws purity thiab compositional stability ncaj qha cuam tshuam rau tus nqi nqus thiab faib uniformity ntawm magnesium thiab tsawg lub ntiaj teb cov ntsiab lus nyob rau hauv tus neeg sawv cev spheroidizing.

Tus nqi:

Siv qib siab - qib (piv txwv li, FeSi75Al0.5-A) ferrosilicon raws li cov khoom siv raw pab tsim cov spheroidizing tus neeg sawv cev nrog cov tshuaj tiv thaiv ruaj khov, siab magnesium yield, thiab ruaj khov spheroidizing nyhuv, thaum kawg txhim kho elongation thiab cuam tshuam toughness ntawm ductile hlau castings.

3. High -kev ua haujlwm deoxidation, purifying molten steel

Txoj Cai:

Silicon muaj kev sib raug zoo rau cov pa oxygen, ua kom qis - melting - cov khoom siv silicate uas yooj yim ntab thiab tshem tawm. Casting ferrosilicon yog siv rau qhov kawg deoxidation thaum lub sij hawm tapping txheej txheem ntawm cam khwb cia hlau, zoo txo cov pa oxygen nyob rau hauv cov hlau molten thiab tiv thaiv kev tsim ntawm porosity thiab oxide inclusions.

Cov ntaub ntawv:

Nyob rau hauv cam khwb cia hlau ntau lawm, ntxiv ib tug tsim nyog tus nqi ntawm ferrosilicon rau deoxidation yuav txo tau cov pa cov ntsiab lus ntawm cov hlau molten los ntawm 30-50%, ho txhim kho qhov ntom ntawm castings thiab ultrasonic flaw nrhiav kom dhau tus nqi.

4. Economic efficiency thiab txheej txheem adaptability

Tus nqi kom zoo dua:

Piv rau cov khoom siv hlau ntshiab (xws li cov manganese ntshiab thiab cov chromium ntshiab), ferrosilicon muaj cov nqi tsim khoom tsawg thiab yog txoj hauv kev pheej yig tshaj plaws los muab silicon.

Txheej txheem - phooj ywg:

Cam khwb cia ferrosilicon muaj qhov ntom ntom, ua rau nws yooj yim rau yaj hauv molten hlau lossis hlau, uas ua rau muaj kev ruaj khov tsis muaj kev sib tsoo hnyav. Nws qhov loj me tuaj yeem hloov kho kom haum rau ntau yam txheej txheem casting ntxiv xws li dej ntws, xaim noj, thiab hauv - txoj kev ntws.

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FAQ

Q1: Yuav ua li cas xaiv qhov loj ntawm inoculant ferrosilicon?

A1:Kev xaiv loj feem ntau yog nyob ntawm kev ua pob loj, ua haujlwm kub, thiab txoj kev inoculation.

Pob me me / hauv -flow inoculation:0.2-0.7mm los yog 0.5-1.5mm yog pom zoo, yuav tsum tau ceev dissolution.

Loj pob / dej ntws txoj kev:1-3mm lossis 2-8mm yog pom zoo, ntsuas qhov kev sib tw ceev thiab ua haujlwm tsis zoo.

Hauv -pwm inoculation:Siv cov hmoov zoo ntawm 0.2-0.5mm.

Lub hauv paus ntsiab lus tseem ceeb yog:Nyob rau hauv lub premise tias lub inoculant yog kiag li yaj thiab uniformly tov nrog molten hlau, xaiv lub coarsest tau loj kom ntev lub sij hawm inoculation zoo thiab tiv thaiv fading.

Q2: Vim li cas qee cov qib ferrosilicon muaj cov kev cai nruj ntawm cov ntsiab lus txhuas?

A2:Aluminium yog ob -edged ntaj hauv ferrosilicon inoculation.

Cov teebmeem zoo:Cov nqi ntawm aluminium (<1.0%) help enhance the inoculation effect and form more graphite nuclei.

Cov teebmeem tsis zoo: Excessive aluminum content (>1.5%) ua rau muaj kev pheej hmoo ntawm subcutaneous porosity (pinholes) hauv castings, tshwj xeeb tshaj yog rau resin xuab zeb molding txheej txheem. Yog li ntawd, high-kawg castings (xws li cua zog, nuclear zog, thiab automotive structural qhov chaw) feem ntau yuav tsum tau qis -aluminium inoculants (Al Tsawg dua los yog sib npaug rau 0.5%). Koj qib "A" tshwj xeeb yog tsim los rau qhov kev xav tau no.

Q3: Yuav ua li cas txiav txim qhov zoo ntawm ferrosilicon inoculants?

A3: Koj tuaj yeem txiav txim siab los ntawm cov hauv qab no:

Kev sib xyaw ua ke:Tshawb xyuas cov ntawv tshaj tawm los ntawm cov chaw tsim khoom rau txhua pawg kom pom tias qhov kev hloov pauv hauv cov ntsiab lus tseem ceeb yog me me.

Loj Distribution:Saib xyuas los yog sieve kom pom tias nws muaj hmoov ntau dhau<0.1mm (indicating poor crushing control) or coarse particles >5mm (uas yuav ua rau inoculation degradation).

Kev huv huv:High-cov khoom zoo yuav tsum muaj cov xim hlau nplaum, tsis muaj qhov pom tseeb tsis yog-cov khoom siv hlau lossis cov nplai oxide hnyav.

Kev siv nyhuv:Txoj kev txheeb xyuas ncaj qha tshaj plaws yog ua qhov kev kuaj dawb hlau dav ntawm daim duab peb sab thiab sib piv cov teebmeem inoculation ntawm cov khoom los ntawm cov tuam txhab sib txawv.

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