Calcium Silicon 60 30 Alloy rau Steelmaking Deoxidation thiab Inclusion Control 

Calcium silicon 60 30 xa cov deoxidation meej thiab kev tswj xyuas hauv kev ua cov hlau niaj hnub-tshwj xeeb tshaj yog nyob rau hauv cov qib high-qib cov qauv hlau, qib kav dej, thiab daim ntawv tsheb. Peb tau muab cov hlau no rau 12 EAF thiab BOF cov nroj tsuag thoob plaws Tuam Tshoj thiab cov teb chaws Asia nyob rau 18 lub hlis dhau los. Nyob rau hauv txhua rooj plaub, cov neeg siv tau tshaj tawm ceev slag clarification, txo tag nrho cov pa seem (0.0018-0.0024 wt%), thiab ntsuas kev txhim kho hauv ultrasonic xeem dhau tus nqi rau tuab-section forgings.

Vim li cas Calcium Silicon 60 30 Outperforms Generic CaSi Alloys

Tsis yog tag nrho cov calcium silicon alloys coj tib yam hauv ladle metallurgy. Lub npe "60 30" yog hais txog kev lav qhov tsawg kawg nkaus: 60% Si thiab 30% Ca los ntawm qhov hnyav. Qhov piv ntawd tseem ceeb - tsis yog raws li daim ntawv qhia kev lag luam, tab sis raws li lub tshuab thev naus laus zis. Ntawm 60% Si, cov hlau tseem ruaj khov thaum pub mis; qis dua 58%, nws zoo li tawg hauv daim ntawv thov cored. Ntawm 30% Ca, dissolution kinetics phim tus qauv argon-stirring profiles hauv 80-120 tuj ladles. Peb tau sim xya qhov kev lag luam CaSi batches sab-los-sab: tsuas yog cov kev sib ntsib ob qho tib si specs ua tiav Ca rov qab zoo dua 62%.

Kev tswj hwm impurity cais kev ua haujlwm tsis zoo. Peb cov calcium silicon 60 30 tuav Al ≤0.3%, S ≤0.03%, thiab P ≤0.025%. Vim li cas qhov ntawd tseem ceeb? Aluminium cov ntaub ntawv uas tsis tshua muaj melting Al₂O₃-CaO spinels uas txhaws tundish nozzles. Sulfur tshuaj lom calcium sulfide-forming peev xwm. Ib tus neeg siv khoom hauv Guangdong tau txo qhov tsis zoo ntawm qhov teeb meem los ntawm 74% tom qab hloov los ntawm 28% Ca batch nrog 0.52% Al rau peb cov ntawv pov thawj 60 30 qib.

Qhov no tsis yog theoretical. Nws tau ntsuas hauv cov ntaub ntawv tundish, suav nrog daim duab qhia chaw los ntawm SEM-EDS kev tshuaj xyuas, thiab cov ntaub ntawv qhia txog cov txiaj ntsig milling. Calcium silicon 60 30 tsis yog tsuas yog tshem tawm cov pa oxygen xwb - nws rov ua dua qhov suav nrog morphology. Globular CaS thiab calcium aluminates hloov ntse-edged alumina pawg. Qhov kev hloov pauv ncaj qha txhim kho ductility ntawm -40 ° C thiab qaug zog lub neej hauv cov khoom ua kom txias.

Qhov twg Standard CaSi Fail - thiab Yuav Ua Li Cas 60 30 Kho Nws

Qee tus yuav sib cav tias pheej yig dua 25-28% CaSi ua haujlwm zoo rau kev deoxidation yooj yim. Tab sis nyob rau hauv kev xyaum, cov qib no yuam kev lag luam tawm. Cov ntsiab lus calcium uas qis dua xav tau ntau dua ntxiv - nce slag ntim, tsa cov khoom siv refractory, thiab diluting ladle kub. Ib tug steelmaker ntxiv 1.8 kg / tuj ntawm 26% CaSi mus ntaus lub hom phiaj [O]; hloov mus rau calcium silicon 60 30 txiav ntau npaum li cas rau 1.1 kg / tuj thaum txhim kho Ca rov qab los ntawm 19 feem pua ​​​​cov ntsiab lus.

Tus nqi tiag tiag tsis yog alloy - nws yog qhov cuam tshuam hauv qab. Nyob rau hauv-dosed CaSi yoojyim yaj oxygen siab. Over-dosed CaSi tsim ntau CaS stringers. Ob qhov xwm txheej tsis dhau ASTM A1019 lossis EN 10228-2 suav nrog kev ntsuas kev ntsuas rau cov phaj siab. Peb qib 60 30 hits lub qhov rais nqaim qhov twg Ca kev ua haujlwm txaus los hloov kev suav nrog * yam tsis muaj * saturating lub yaj. Cov kev sim hauv chav kuaj pom cov txiaj ntsig zoo ntawm 0.0025–0.0032% yaj Ca—ua tau tsuas yog nrog kev tswj nruj nruj thiab cov ntsiab lus roj tsawg (<15 cm³/100g).

Peb sim txhua qhov cua sov rau hydrogen, nitrogen, thiab oxygen siv inert gas fusion (Leco ONH-836). Tsis muaj batch ships yam tsis muaj daim ntawv pov thawj tag nrho ntawm kev soj ntsuam-xws li Ca, Si, Al, S, P, thiab seem Mg. Cov neeg siv khoom qhia peb qhov kev taug qab no txiav lawv lub sijhawm QA sab hauv los ntawm ib nrab thaum tsim nyog cov cua sov tshiab rau cov ntawv thov qib nuclear.

Kev koom ua ke yooj yim dua li koj xav

Pub calcium silicon 60 30 yuav tsum tsis muaj retrofit. Nws ua haujlwm hauv cov txheej txheem cored hlau (Ø13-15 mm), submerged lance injectors, thiab txawm tias cov hmoov txhaj tshuaj-yog tias qhov loj me me faib nyob rau hauv 0.5-3.0 hli. Peb muab nws nyob rau hauv peb lub cev daim ntawv: crushed granules (rau ladle ntxiv), pre-alloyed cored hlau (nrog Fe los yog SiMn sheathing), thiab precision-packed 25 kg lub tshuab nqus tsev-sealed hnab rau cleanroom ib puag ncig.

Cov ntawv tseem ceeb ntawm kev teeb tsa: khaws cia hauv qab 35 ° C thiab deb ntawm cov dej noo. Tawm rau huab cua ntub rau> 48 teev nce oxidation-pom zoo li cov hmoov av grey ntawm granules. Cov txheej txheem oxide ntawd ua rau qeeb qeeb thiab txo qis kev xa khoom Ca. Peb suav nrog cov pob khoom desiccant thiab cov ntsuas av noo hauv txhua qhov khoom xa tuaj. Rau cov kab nruam nruam khiav> 150 tons / teev, peb pom zoo pub 30-60 vib nas this ua ntej zaum kawg argon nplawm - tsis yog lub sijhawm - kom ua kom lub sijhawm nyob hauv cov hlau loj.

Cov tswv yim tiag tiag hauv ntiaj teb lees paub kev ntseeg tau. A Tier-1 tus neeg muag khoom pib hauv Chongqing tau khiav 47 qhov sib law liag siv peb cov calcium silicon 60 30. Qhov nruab nrab suav nrog ib mm² poob ntawm 8.2 txog 2.7 (ASTM E45 Txoj Kev A). Cov txiaj ntsig tau nce 3.1% - tsis yog los ntawm kev tsis lees paub tsawg dua, tab sis los ntawm tsawg dua rov yob vim muaj qhov tsis xws luag.

Xaiv tus tsim khoom tsim nyog txhais tau tias nug cov lus nug zoo

Nug koj tus neeg muag khoom: Koj puas tau zeb thiab sib xyaw hauv tsev - lossis tsuas yog rov ntim cov khoom thib peb? Koj puas tuaj yeem muab cov ntaub ntawv tshwj xeeb OES thiab Leco? Koj qhov nruab nrab Ca rov qab sib txawv ntawm 100-tuj cua sov yog dab tsi? Inner Mongolia Xinxin Silicon Industry Co., Ltd. teb yog rau tag nrho peb. Peb ua haujlwm tshwj xeeb CaSi cov kab ntau lawm nrog kaw-kho qhov ntsuas kub, ntsuas lub sijhawm tiag tiag, thiab siv lub tshuab sieving calibrated rau ± 0.1 hli kam rau ua.

Peb cov calcium silicon 60 30 txhawb nqa cov tswv yim ferroalloy - tsis yog rau deoxidation, tab sis rau cov phiaj xwm suav nrog engineering. Nws ua khub kwv yees nrog Mg-kho ladles rau kev txhim kho nodularity nyob rau hauv cov hlau ductile, thiab nrog Ti ntxiv rau stabilized microalloyed HSLA qib. Mus saib xinxinsilicon.com Txhawm rau rub tawm peb cov ntawv xov xwm "CaSi 60 30 hauv Ladle Metallurgy: Daim Ntawv Qhia Txog Kev Noj Qab Haus Huv, Daim Ntawv Qhia Ntxiv, thiab Kev Ntsuam Xyuas Hom Tsis Ua Haujlwm"-tsim los ntawm 217 cov ntaub ntawv tsim tawm thoob plaws 14 steelworks.

Calcium silicon 60 30 tsis yog khoom muag. Nws yog ib qho cuab yeej calibrated. Siv nws txoj cai, thiab koj yuav pom cov slags huv, cov cuab yeej cuab tam nruj dua, thiab tsawg dua qhov xav tsis thoob ntawm lub zeb tiav.