Ferrovanadium yog dab tsi thiab cov qhab nia txhais li cas
Ferrovanadium (FeV) yog ib tug master alloy ntawm hlau thiab vanadium siv los qhia vanadium rau hauv hlau thiab kho kom zoo nkauj nws muaj pes tsawg leeg ua ntej casting. Cov qib kev lag luam tau muab faib ua feem ntau los ntawm cov ntsiab lus vanadium: lub npe FeV50 txhais tau tias yog ib qho nominal 50% vanadium los ntawm huab hwm coj, nrog cov hlau thiab tswj cov khoom seem ua kom sib npaug. Cov hlau yog muab los ua pob, granules lossis hmoov nyob ntawm seb nws yuav raug them li cas, thiab qhov ntsuas kub tiag tiag tau tshaj tawm ntawm daim ntawv pov thawj zeb.
Vim hais tias vanadium yog ib qho muaj zog carbide thiab nitride qub, qhov sib ntxiv me me hloov lub zog, hardness thiab tempering tus cwj pwm ntawm cov hlau tiav. Tias yog vim li cas qhov kev xaiv qib yog tsav los ntawm cov khoom xav tau ntawm cov khoom kawg es tsis yog los ntawm tus nqi ib leeg.
Standard Qib Range ntawm ib nrais muag
| Qib | Nominal vanadium | Cov qauv ntawm cov khoom lag luam | Yam kawg siv |
|---|---|---|---|
| FeV 40 | 40 % V | pob | Lub hom phiaj dav dav, tus nqi rhiab carbon thiab cov qauv hlau |
| FeV 50 | 50 % V | pob, granule | Cov txheej txheem, HSLA thiab cov hlau reinforcing |
| FeV 60 | txog 60% V | pob | daim ntawv thov uas sib npaug kev ua haujlwm tiv thaiv tus nqi |
| fwv 75 | 75 % V | pob, granule | siab zog steels, cuab yeej thiab tuag steels |
| fwv 80 | 80 % V | pob, granule | xav tau kev ua haujlwm siab, aerospace thiab tiv thaiv hlau |
Vanadium cov ntsiab lus tsis yog qhov sib txawv ntawm cov qib. Silicon, aluminium, carbon, phosphorus thiab sulfur txwv kuj nruj raws li qib nce, vim hais tias cov steelmaker ntxiv tsuas yog ib tug me me ntawm FeV thiab tsis xav coj pliaj silicon los yog txhuas mus rau hauv ib tug huv si, uas tsis muaj carbon tshav kub.
Yuav ua li cas Vanadium Cov ntsiab lus cuam tshuam rau kev ua haujlwm hlau
Thaum lub sij hawm solidification thiab tom qab kev kho cua sov, vanadium ua ke nrog cov pa roj carbon thiab nitrogen los ua kom zoo V (C, N) precipitates. Cov khoom no pin cov ciam teb thaum lub sij hawm kub dov thiab tom qab ntawd muab cov nag lossis daus ntxiv rau qhov txias, uas ua rau lub zog tawm los yam tsis muaj qhov sib npaug ntawm qhov hnyav.
Cov ntsiab lus ntau dua ntawm vanadium nce qhov ntim ntawm cov tawv carbide muaj, yog li hnav tsis kam thiab kub hardness txhim kho.
Vanadium carbides tiv taus coarsening, uas yog vim li cas vanadium bearing cuab yeej steels khaws lawv hardness tom qab rov tempering.
Ntawm qhov sib ntxiv qis hauv cov qauv hlau, vanadium nce tawm lub zog thiab qaug zog ua haujlwm ntawm tus nqi qis alloy.
Tshaj li qib uas xav tau rau daim ntawv thov, vanadium ntxiv tus nqi ntxiv, tuaj yeem txo cov ductility thiab tuaj yeem ua rau cov machinability nyuaj, yog li cov qib yuav tsum tau sib phim rau cov cuab yeej lub hom phiaj es tsis yog qhov yooj yim tshaj plaws.
Xaiv Cov Qib Zoo rau Daim Ntawv Thov
FeV40 thiab FeV50 haum rau kev txhawb nqa bar, feem ntau cov txheej txheem thiab lwm yam khoom siv tus nqi uas muaj zog me me kom txaus.
FeV60 raug xaiv thaum nruab nrab ntau qhov sib ntxiv ntawm vanadium thiab lub khw melting xav tau kev hloov pauv ntawm cov qauv thiab lub zog siab dua.
FeV75 yog feem ntau rau siab zog engineering steels, forging qib thiab cov cuab yeej los yog tuag steels qhov twg hardness thiab hnav tsis kam.
FeV80 yog tshwj tseg rau cov ntawv thov xws li aerospace thiab cov khoom tiv thaiv thiab cov hlau ua haujlwm siab uas yuav tsum tuav cov khoom ntawm qhov kub siab.
Kev cai feem pua vanadium tuaj yeem tsim rau cov neeg siv khoom uas nws cov qauv poob ntawm cov qauv qib.
Melt Practice, Ntxiv thiab rov qab
Vanadium muaj kev sib raug zoo rau cov pa oxygen dua li silicon thiab txhuas, yog li ferrovanadium feem ntau ntxiv thaum tapping lossis ncaj qha rau hauv lub ladle es tsis yog thaum tshav kub kub. Ntxiv nws tom qab deoxidation ua kom rov zoo siab thiab zoo ib yam, thiab tsis txhob poob vanadium rau slag.
Lump loj kuj cuam tshuam cov txiaj ntsig. Cov khoom uas ntxhib heev yuav tsis yaj tag nrho ua ntej nrum rau hauv me me heats, thaum cov nplua nplua yuav ploj mus rau slag los yog hmoov av extraction. Kev sib raug zoo ntawm qhov loj me, ua ke nrog kev ntsuas kub nruj ntawm FeV nws tus kheej, yog qhov tso cai rau cov neeg tsim khoom siv steel kom ntaus lub qhov rais nqaim vanadium hauv cov hlau tiav yam tsis tau rov ua kom sov.
Cov lus nug nquag
Q: Qhov txawv ntawm FeV50 thiab FeV80 yog dab tsi?
Qhov sib txawv tseem ceeb yog cov ntsiab lus vanadium, ib qho nominal 50% tawm tsam nominal 80%. FeV80 muab ntau dua vanadium ib tonne them thiab muab nrog cov khoom seem nruj dua, yog li nws yog siv rau cov hlau ua haujlwm siab uas tsawg dua impurities raug zam.
Q: Dab tsi yog qib ferrovanadium siv rau HSLA steel?
FeV40, FeV50 thiab FeV60 yog cov kev xaiv ib txwm, vim HSLA steels tsuas yog xav tau ib qho me me vanadium ntxiv, feem ntau yog ob peb pua ntawm ib feem pua ntawm cov hlau tiav, kom tau txais txiaj ntsig los nag ntxiv.
Q: Vim li cas tus nqi nce li cov ntsiab lus vanadium nce?
Ntau vanadium ib tonne ntawm alloy txhais tau hais tias ntau dua ntawm cov khoom kim heev hauv txhua kilogram xa khoom, thiab cov qib siab dua kuj yuav tsum tau nruj dua tswj ntawm silicon, aluminium thiab carbon, uas ntxiv cov nqi ua haujlwm.
Q: Yuav ua li cas ferrovanadium ntxiv rau lub tshav kub hlau?
Nws yog nquag them rau hauv lub ladle lossis ntxiv thaum tapping tom qab deoxidation. Cov kab ke no tiv thaiv vanadium los ntawm oxidation thiab ua kom rov ua tau zoo, yog li qhov kawg chemistry sib tw rau kev tsom xam.
Q: ferrovanadium puas tuaj yeem muab tau nrog cov ntsiab lus vanadium?
Yog lawm. Cov neeg tsim khoom uas tswj hwm lawv tus kheej melting thiab crushing tuaj yeem muab los yog xaiv cov cua sov kom xa cov feem pua ntawm vanadium thiab ib feem me me, nrog rau cov ntawv pov thawj rau txhua pawg.
Q: Yuav khaws ferrovanadium li cas?
Khaws kom qhuav thiab npog, ntawm ib qho tawv tawv thiab sib cais los ntawm qib thiab ntau. Moisture thiab grading mix ups yog ob qho laj thawj feem ntau ntawm kev rov qab tsis sib haum thaum lub alloy ncav cuag lub ladle.