Nws yog xim hlau Silicon (Si) plays Lub Luag Haujlwm Tseem Ceeb hauv Steel ntau lawm, feem ntau raws li adeoxidizer, sib ntxaws alloy, thiabKev Ua Kom Zoo DuaCov. Hauv qab no yog nws cov ntawv thov tseem ceeb thiab cov txheej txheem hauv kev tsim cov hlau:
1. Deagidation (Tshob Metallurgy)
Lub luag haujlwm:Silicon reacts nrog yaj oxygen hauv Molten Steel los uaSilicon Dioxide (Sio₂), txo qhov porosity thiab txhim kho cov hlau zoo.
Cov tshuaj tiv thaiv:
2si + O2 → 2Sio22Si + O2 → 2Sio2
Qhov Zoo:
Tiv thaiv cov pa npuas (piv txwv li, co) thaum lub sijhawm solidification, txo kev puas tsuaj rau hauv cov khoom kawg.
Feem ntau siv nrog txhuas (al) rau symidistic deoxidation.
2. Alloying caij hauv cov hlau tshwj xeeb
Silicon steel (hluav taws xob hlau):
Composition:2-4.5% SI.
Ua Haujlwm:Txohysteresis poobthiab txhim kho cov sib nqus permeability.
Cov Ntawv Thov:Transformer cores, hluav taws xob tshuab hluav taws xob, thiab cov tshuab hluav taws xob thiab cov tshuab hluav taws xob.
Tus Hlau Stainless:
Composition:0. 2-2% SI.
Ua Haujlwm:Txhim kho cov oxidation tsis kam thiab high-kub lub zog.
3. Txhim Kho Cov Khoom Siv Neeg Kho Tshuab
Lub zog thiab Hardness:Silicon txhawb cov ferrite (-fe) los ntawm kev daws teeb meem kev daws teeb meem.
Ductility:Tswj cov ntsiab lus silicon (~ {0}}}}}}}. 2-0.3%) cov sib npaug muaj zog thiab ua rau cov qauv txheem.
4. Kev txhim kho corrosion thiab kub tiv
Oxidation tsis kam:Ua cov kev tiv thaiv cov nplais sio₂ txheej ntawm cov hlau sib tw ntawm cov chaw kub.
Cov Ntawv Thov:
Cov hlau kub-resistant cov hlau rau boilers, tshuab, thiab tso lub tshuab.
Automotive stride Cheebtsam (piv txwv li, catalytic converter tsev).
5. Silicon hauv cam khwb cia hlau
Grey cam khwb cia hlau:
Composition:1-3% SI.
Lub luag haujlwm:Txhawb nqa graphite tsim, txhim kho tshuab luam ntawv thiab kev co damping.
Zas nrum hlau:
Composition:2-3% SI.
Lub luag haujlwm:Facilitates nodular graphite tsim (nrog kev kho mob magnesium), txhim kho kev sab nrauv.
6. Silicon li tus neeg sawv cev
Ferrosilicon (Fesi):
Lub silicon-hlau alloy (45-75-75% siv los txo cov hlau oxides (piv txwv li, cr₂o₃ hauv stainless hlau lawm).
Piv txwv piv txwv:
3fesi +2} cr2o3 → 4} sio {}} → 4 {} sio2 {14 {14 {14 {14 {14 {14 {14 {14}}
7. Tswj Kev Tsaws Qua
Silicon hloov kho slag viscosity thiab yooj yim thaum lub sij hawm steelmaking, txhim kho kev tshem tawm desulfuration thiab kev raug tshem tawm.
Key Steel Qeb Ntxawm Utilizing Silicon
| Hlau Hom | Cov ntsiab lus ntawm SII | Cov Khoom Siv Tseem Ceeb | Cov Ntawv Thov |
|---|---|---|---|
| Hluav Taws Xob Hluav Taws Xob | 2–4.5% | Siab sib nqus preatability, cov tub ntxhais tsis muaj zog | Transformers, Motors, Generator |
| Stainless Hlau (304) | 0.3–1% | Oxidation tsis kam, siab-kub zog | Chav ua noj ua noj ua mov, tshuaj tso tsheb hlau luam |
| Lub Caij Nplooj Hlav Hlau (SAE 9254) | 1.2–2% | Nkees ua rau, elasticity | Kev Ncua Tsheb Tsheb, Kev Muaj Kev Lag Luam |
| Thaum Tshav Kub Kub-Resistant Steel | 0.5–2.5% | Ruaj khov ntawm cov kub | Lub hwj chim nroj tsuag, ib qho khoom siv ntawm lub tshuab hluav taws xob |
Txheej Txheem Ntau Lawm
Thawj steelmaking:
Silicon (feem ntau liferrosilicon) yog ntxiv thaum lubTshob Refining Theemrau deoxidation.
Thib ob lees tias:
Hloov kho Silicon cov ntsiab lus kom tau raws li Alloy Specifications (piv txwv li cov hlau hluav taws xob).
Casting / Dov:
Silicon-enriched steel yog nrum rau hauv slabs lossis dov rau hauv cov ntawv txheeb rau hauv cov txheej txheem hauv qab.
Cov kev sib tw thiab kev txiav txim siab
Silicon oxidation poob:Ntau cov pa oxygen nyob rau hauv Molten hlau noj silicon, xav tau cov txheej txheem kho kom haum.
Graphitization nyob rau hauv cam khwb cia hlau: Overly high silicon (>3%) tej zaum yuav kav cov khoom khov kho, txo qhov nyuaj.
Nqi:Kev siab tawv nqaij Silicon Cov nqi ntxiv nce ntau lawm, tshwj xeeb tshaj yog rau cov qib siab.
Kev cuam tshuam ib puag ncig thiab nyiaj txiag ib puag ncig
Ub:Silicon-nplua nuj Steel seem yog reprocessed kom rov ua silicon, txo cov raw khoom siv.
Nrhav:Kev loj hlob ntawm cov av tsawg-silicon rau tus nqi txo yam uas tsis muaj kev ua tau zoo.
