Cov ntsiab lus Silicon cuam tshuam li cas rau kev ua tau zoo ntawm Ferro Silicon hauv kev kho Inoculation?

Inoculation kev kho mob yog ib tug txheej txheem tseem ceeb nyob rau hauv cam khwb cia hlau ntau lawm los txhim kho solidification qauv thiab txhim khu cov khoom siv.Ferrosilicon, raws li qhov siv ntau tshaj plaws inoculator, muaj cov ntsiab lus silicon (feem ntau 45-75%) uas cuam tshuam ncaj qha rau kev ua haujlwm ntawm inoculation, kev ua haujlwm zoo, thiab qhov kawg casting zoo. Kev nkag siab txog kev sib raug zoo ntawm cov ntsiab lus ntawm silicon thiab inoculation kev ua tau zoo yog qhov tseem ceeb rau kev txhim kho cov txheej txheem ntau lawm, txo cov nqi, thiab txhim kho cov khoom sib tw.

1 Lub Metallurgical Essence of Inoculation Treatment

Inoculation kev kho mob yog ib tug txheej txheem uas optimizes lub kawg microstructure thiab cov khoom ntawm cam khwb cia hlau los ntawm kev ntxiv tej yam tshuaj (inoculations) rau molten hlau, yog li hloov tus cwj pwm solidification ntawm cov hlau. Nws cov haujlwm tseem ceeb suav nrog:
 Txhawb nqa graphite nucleation:nce graphite crystal nuclei thiab refining graphite morphology
 Txo supercooling nyiam:txo cov℃ntawm supercooling thaum lub sij hawm molten hlau solidification
 Txhim kho matrix qauv:optimizing pearlite / ferrite piv thiab faib
 Tshem tawm cov carbide:tiv thaiv kev tsim cov qauv hlau dawb thiab txhim kho machinability

2 Txoj hauj lwm tseem ceeb ntawm ferrosilicon ua ib qho inoculant

Kwv yees li 85% ntawm lub ntiaj teb cam khwb cia hlau tsim siv fesi ua lub ntsiab inoculant, vim yog:
 Silicon yog lub zog graphitizing nrog zoo sib xws nrog molten hlau
 Tus nqi siab -kev ua tau zoo thiab paub tab ntau lawm technology
 Kev ua tau zoo tuaj yeem tswj tau yooj yim los ntawm kev kho cov ntsiab lus silicon thiab kab kawm
 Muaj peev txheej thiab khoom ruaj khov

1 Graphite Nucleation Promotion Effect

Nucleation Substrate Tsim:

Silicon hauv ferrosilicon txhawb kev txo qis hauv supercooling ntawm molten hlau, tsim silicon- nplua nuj microregions, muab cov kev mob zoo rau graphite nag lossis daus.

Optimal Silicon Concentration Range:

Cov kev tshawb fawb qhia tau hais tias cov nucleation efficiency yog siab tshaj nyob rau hauv 65-72% Si range; rau txhua txhua 1% nce nyob rau hauv zoo silicon, lub nucleation qhov chaw ceev nce li ntawm 15-20%.

2 Cov ntawv muaj nyob thiab kev ua ub no ntawm cov ntsiab lus hauv Ferrosilicon

Carrier Lub luag hauj lwm ntawm Cov Ntsiab Cai xws li Calcium, Aluminium, thiab Strontium:

Silicon cov ntsiab lus cuam tshuam rau cov ntawv muaj nyob thiab tso tawm kinetics ntawm cov ntsiab lus tseem ceeb no.

Synergistic Effect:

Nyob rau nruab nrab cov ntsiab lus silicon (60-68% Si), silicon thiab kab kawm (xws li 0.8-1.5% Ca, 0.8-1.2% Al) tsim kom muaj kev sib koom ua ke zoo, txhawb kev tsim ntawm inoculation nuclei.

Table 1: Cov nyhuv sib txawv ntawm Silicon Cov Ntsiab Lus Ferrosilicon ntawm Cov Khoom Ntawm Grey Cast Iron (Kev Kho Mob Kub 1500 degree, 0.3% Ntxiv)

Table 2: Kev Tshawb Fawb Sib Piv ntawm Fertility Decline Behavior

1 Automotive Industry Applications

Case 1: Cav Block Production (Ib tug zoo-paub automaker)

Thawj Txheej Txheem: Siv 60% Si ferrosilicon, seem tus nqi 3.2%, kev ua haujlwm hloov pauv ± 12%

Cov txheej txheem ua kom zoo: Hloov mus rau 68% Si ferrosilicon nrog 0.1% Bi microalloying

Cov txiaj ntsig: Cov khoom seem txo qis rau 1.1%, txo qis 65%.
Kev ua tau zoo

Kev hloov pauv tau nqaim mus rau ± 6%
Txiav cov cuab yeej lub neej txuas ntxiv los ntawm 40%
Kev txuag nyiaj txhua xyoo ntawm kwv yees li 2.3 lab RMB

Case 2: Kev tsim ntau ntawm Nres Discs

Kev sib tw: Carbides yooj yim tsim nyob rau hauv nyias - cov phab ntsa (8-12mm)

Kev daws: Siv72% Si ferrosiliconrau hauv -flow inoculation

Cov txiaj ntsig: Carbides tshem tawm tag nrho
Hardness uniformity txhim kho los ntawm 35%
Fatigue life test pass tus nqi nce ntawm 88% mus rau 99.5%

2 Kev tsim khoom siv hluav taws xob

Cua Turbine Hub Casting (Ib Daim Nyhav 12-18 Tons)

Special Requirements: Low-temperature impact toughness >12J (-20 degree), kev ua haujlwm zoo ib yam thoob plaws tag nrho ntu ntu
Kev daws teeb meem: Staged Inoculation txheej txheem
Ib qho Inoculation:65% Si ferrosilicon, 0.4% ntxiv
Hauv -flow Inoculation:70% Si ferrosilicon, 0.15% ntxiv

Achieved Indicators:
Body tensile strength >400MPa, elongation >18%
-20℃cuam tshuam toughness 14-16J
Hardness txawv ntawm 20 cross-sections<15HB

3 Siab-Xaiv Tshuab Castings

Loj Gantry Milling Tshuab txaj (Qhov hnyav 45 Tons)

Cov teeb meem tseem ceeb: Dimension stability, residual stress control
Kev daws: Tsawg- nrawm, ntev- lub sij hawm inoculation siv 62% Si ferrosilicon

Kev Txhim Kho Zoo:
Dimensional Accuracy: Ncaj 0.08mm / m → 0.03mm / m
Kev laus deformation txo los ntawm 60%
Kev taw qhia nto hardness sib xws: ± 5HB → ± 2HB

1 Kev xaiv raws li hom Casting

Nyias-walled complex castings:

70-75% Si pom zoo rau kev tawg sai thiab txo qis inoculation degradation.

Nruab nrab - mus rau - cov khoom loj loj:

65-70% Si pom zoo kom sib npaug cov nyhuv inoculation thiab nqi.

Heavy castings:

60-65% Si tuaj yeem siv tau, ua ke nrog cov txheej txheem tsim nyog.

2 Kev txiav txim siab ntawm kev ua haujlwm tsis zoo

Ua Haujlwm Kub:

High -kev ua haujlwm kub (txog 1500 degree) tuaj yeem txo cov ntsiab lus ntawm silicon.

Txoj Kev Ntxiv:

Nyob rau hauv - ntws ntxiv yuav tsum muaj kev sib cais sai dua thiab tsim nyog rau cov ntsiab lus silicon ntau dua.

3 Tus Nqi -Kev Tshawb Fawb Txog Kev Pabcuam

Economical Silicon Content Range:

Xav txog ob qho tib si kev ua tau zoo thiab tus nqi, 62-70% Si feem ntau muab qhov txiaj ntsig zoo tshaj plaws.

Cov teebmeem tsis zoo ntawm ntau dhau Silicon:

Tshaj 75% Si tuaj yeem ua rau cov ntsiab lus silicon ntau dhau hauv cov hlau molten, cuam tshuam rau cov qauv matrix.