Qhov zoo ntawmFerroSilicon 75yog lub hauv paus ntawm "cov ntsiab lus ntawm silicon meej, tswj tsis tau, qhov loj me, thiab cov ntsiab lus ntawm cov dej noo txaus." Cov cim tseem ceeb thiab kev txwv kev lag luam yog raws li hauv qab no:
| Qhov Ntsuas Zoo | Standard Requirements Scope | Qhov cuam tshuam tseem ceeb ntawm Kev Tshaj Tawm / Tsis Ua Raws Li Cov Qauv |
| Silicon (Si) Cov ntsiab lus | 72% -80% (batch fluctuation Tsawg dua lossis sib npaug rau ± 2%) | <72%: Deoxidation efficiency decreases by 30%, insufficient alloying; >80%: Tus nqi nce 10% -15%, tsis muaj kev ua tau zoo ntxiv |
| Ua phem impurities | S Tsawg dua lossis sib npaug li 0.05%, P Tsawg dua lossis sib npaug li 0.04% |
Ntau dhau S: Kub brittleness defect tus nqi ntawm cov hlau nce mus rau 2.5%; Ntau dhau P: Tsawg- qhov kub thiab txias cuam tshuam qhov tawv ntawm cov hlau txo qis dua 50%. |
| Limiting impurities | Al Tsawg dua lossis sib npaug li 1.0% (Less dua lossis sib npaug rau 0.5% rau siab-kawg steel), Ca Tsawg dua lossis sib npaug rau 0.1% | Ntau dhau Al: Tsim ntawm Al₂O₃ suav nrog, ua kom cov hlau tsis zoo rau 3.0%; Tshaj Ca: cuam tshuam cov fluidity ntawm molten steel. |
| Kev faib tawm loj | Thaiv (5-50mm), Granular (1-10mm) | >50mm: Lub sijhawm tawg ob npaug, cov tshuaj tiv thaiv tsis tiav;<1mm: Oxidation loss rate increased to 15% |
| Cov dej noo | Tsawg dua los yog sib npaug li 0.5% | ＞ 0.5%: Hydrogen ntxiv rau cov hlau molten nce qhov porosity tsis xws luag ntawm 0.2% mus rau 1.8%. |
Kev cuam tshuam tshwj xeeb ntawm Core Quality Indicators ntawm Metallurgical Applications
(1) Cov ntsiab lus Silicon: Cov Core Guarantee rau Deoxidation thiab Alloying
Directly txiav txim yam tseem ceeb ntawm deoxidation efficiency:
Lub xeev raws cai (Si=75%):Nrog rau qhov sib ntxiv ntawm 0.3% -0.8%, cov ntsiab lus oxygen hauv cov hlau molten txo los ntawm 80-100ppm mus rau 30-50ppm, ua tiav cov deoxidation efficiency ntawm 60% -70%, thiab cov seem ntawm tsuas yog 0.4% rau oxide inclusions;
Lub xeev tsis raws cai (Si=70%):Nrog rau qhov sib ntxiv ntxiv, cov ntsiab lus oxygen tsuas yog txo mus rau 50-60ppm, deoxidation efficiency txo los ntawm 25%, yuav tsum tau ntxiv 15% -20% FeSi 75% kom tau raws li tus qauv, nce tus nqi ib tuj hlau los ntawm 30-50 yuan.
Tus yuam sij rau alloying precision:
Hauv kev tsim hluav taws xob silicon steel:Cov ntsiab lus silicon ntawm FerroSilicon75 yuav tsum tsis tu ncua ntawm 74% thiab 76% kom tswj tau cov ntsiab lus silicon hauv cov hlau ntawm 2.8% thiab 4.8%, ua rau 20% -25% txo cov hlau poob thiab 15% nce hauv kev sib nqus permeability. Yog tias cov ntsiab lus silicon hloov pauv los ntawm ± 3%, lossis qhov sib txawv ntau dua 0.5%, kev siv hluav taws xob hloov pauv nce los ntawm 8% -10%, tsis ua raws li cov qauv kev siv hluav taws xob.
(2) Cov ntsiab lus impurity: "Hidden Killer" ntawm Steel Purity thiab Performance
Kev puas tsuaj los ntawm kev puas tsuaj impurities (S, P):
Sulfur (S{0}}%, tshaj tus qauv los ntawm 60%):Cov ntaub ntawv FeS (lub ntsiab lus melting ntawm 1190 degree) nrog hlau, ua rau tawg raws cov ciam teb thaum lub sij hawm kub ua hauj lwm ntawm cov hlau. Qhov kub brittleness tsis xws luag nce los ntawm 0.3% mus rau 2.5%, ua rau nws tsis haum rau forging steel, boiler steel, thiab lwm yam khoom uas yuav tsum tau kub ua hauj lwm.
Phosphorus (P=0.06%, tshaj tus qauv los ntawm 50%):Segregates ntawm grain ciam teb los tsim Fe₃P, ua rau muaj kev cuam tshuam toughness ntawm cov hlau poob los ntawm 100J / cm² mus rau hauv qab 45J / cm² ntawm -20 degree, drastic ua rau cov kev pheej hmoo ntawm txias brittleness. Nws yog txwv tsis pub siv rau hauv cov thawv cryogenic thiab choj hlau.
Limiting Impurity (Al) Kev Ntsuas Ntsuas:
Ntau yam tsim nyog (Al=0.3%-0.5%):Pab nyob rau hauv deoxidation, tsim ib tug me me ntawm nplua Al₂O₃ inclusions, uas yuav raug tshem tawm nrog lub slag thiab tsis cuam tshuam rau steel zoo.
Ntau dhau (Al=1.5%):Tsim kom muaj ntau qhov sib txawv ntawm Al₂O₃ suav nrog (loj < 5μm), uas nyuaj rau ntab, ua kom cov hlau nto tiav Ra ntawm 0.8μm txog 2.0μm, ua rau nws tsis tsim nyog rau siab - kawg stainless hlau thiab precision casting ntau lawm.
(3) Kev faib tawm loj: Qhov tseem ceeb rau kev ua haujlwm zoo thiab kev siv cov khoom siv
Dissolution Rate thiab Reaction Uniformity:
Qhov Loj (5-30mm blocky):Ua tiav hauv cov hlau molten ntawm 1500-1600℃nyob rau hauv 5-8 feeb, nrog silicon rov qab tus nqi ntawm 75% -85% thiab steel muaj pes tsawg leeg fluctuation tsawg dua los yog sib npaug rau ± 0.05%;
Excessively Coarse Size (>50mm):Lub sij hawm tawg tau txuas ntxiv mus rau 15-20 feeb, ua rau tsis tiav cov tshuaj tiv thaiv hauv zos, cov pa oxygen hloov pauv hauv cov hlau molten hauv ± 10ppm, thiab cov nyhuv deoxidation tsis ruaj khov;
Loj heev Fine Size (<1mm): Yooj yim nqa tawm los ntawm huab cua thaum pub mis, nce oxidation poob ntawm 5% mus rau 15%, txo cov khoom siv, thiab ua rau cov plua plav ntau dhau.
Qhov loj haum rau cov txheej txheem metallurgical sib txawv:
Hloov / Hluav taws xob rauv Steelmaking:5-50mm lumpy particles, haum rau batch pub, kom ntseeg tau sai sai;
LF Rauv Refining:1-10mm granular hais, siv nrog argon nplawm (kev siv 0.3-0.5 m / s) los txhawb cov flotation ntawm deoxidation khoom;
Casting Inoculation:1-3mm granular hais, kom tsis txhob agglomeration thiab xyuas kom meej zoo casting microstructure.
(4) Moisture Content: Ib qho yooj yim Overlooked Defects-Causing Factor
Tom qab FeSi75% absorbs ya raws (cov ntsiab lus noo noo> 0.5%), cov dej noo decomposes ntawm qhov kub siab los tsim H₂, ua rau cov ntsiab lus hydrogen hauv cov hlau molten nce ntawm 2-3 ppm rau 8-10 ppm:
Casting Production:Cov porosity tsis xws luag nce los ntawm 0.2% mus rau 1.8%, thiab cov seem ntawm cov qauv nyuaj castings doubles;
Bill Production:"Dawb qhov chaw" qhov tsis xws luag tau yooj yim tsim, ua rau muaj kev pheej hmoo ntawm kev tawg thaum lub sij hawm dov tom ntej, yuav tsum tau ua kom qhuav ntxiv (100-120 degree, 2-3 teev), txuas ntxiv lub voj voog ntau lawm.
Kev Lag Luam Kev Lag Luam: FerroSilicon 75% Kev Txhim Kho Cov Lus Qhia Zoo
High Purity:Qhov kev thov nce ntxiv rauqis- txhuas (Al Tsawg dua lossis sib npaug rau 0.3%) FeSi75thiab qis-sulfur (S Tsawg dua lossis sib npaug li 0.03%) FeSi75 los ntawm siab-kawg steel thiab precision casting yog tsav kev txhim kho cov txheej txheem purification;
Customization:Tsim cov qib tshwj xeeb nrog cov ntsiab lus silicon ruaj khov (piv txwv li, 75 ± 1%) thiab qhov ntau thiab tsawg rau kev siv niche xws li hluav taws xob silicon steel thiab stainless hlau;
Ntsuab ntsuab:Kev siv hluav taws xob ntsuab smelting + siab - cov txheej txheem tshem tawm cov plua plav tawm kom txo tau cov pa roj carbon emissions thiab impurity qhia thaum lub sij hawm 75 # FerroSilicon ntau lawm.
