Ferrophosphorus yog tsim los ntawm hlau (Fe) thiab phosphorus (P), nrog rau cov ntsiab lus phosphorus ntawm 15% -25%. Nws tshwm sim raws li pob los yog granules, nrog lub melting point ntawm kwv yees li 1100-1200℃thiab ib tug ceev ntawm 7.2-7.5 g / cm³. Nws cuam tshuam rau steel / castings stems los ntawm ob yam tseem ceeb:
Qhov txwv tsis pub solubility ntawm phosphorus hauv cov hlau (tsuas yog li ntawm 0.02% ntawm chav tsev kub), thiab ntau phosphorus yooj yim precipitates li phosphides xws li Fe₃P;
Phosphorus muaj ib tug muaj zog nyiam mus cais, yooj yim accumulating ntawm grain ciam teb, uas yuav txhim khu kev ua tau zoo tab sis kuj ua rau muaj kev pheej hmoo ntawm embrittlement.
Qhov zoo thiab qhov tsis zoo ntawm FeP hauv Steelmaking thiab nws daim ntawv thov ciam teb
(1) Core Advantages: Txhim khu kev ua tau zoo thiab kev ua kom zoo
Txhim kho lub zog thiab hnav tsis kam:
Phosphorus atoms yaj mus rau hauv cov hlau lattice, ua rau cov lattice distortion, inhibiting dislocation txav, thiab ua tiav cov khoom muaj zog. Tsim nyog rau siab -lub zog lub tsev steel tuav thiab hnav- cov khoom siv kho tshuab resistant, thaum tus nqi ntxiv yog tswj ntawm 0.02%-0.04%, hnav tsis kam yog txhim kho los ntawm 20% -30%.
Pab deoxidation thiab muaj pes tsawg leeg kho:
Phosphorus muaj lub zog tsis muaj zog ntawm cov tshuaj tiv thaiv nrog oxygen thiab tuaj yeem siv los ua tus pab cuam deoxidizer. Nws tuaj yeem siv ua ke nrog ferrosilicon thiab ferromanganese kom txo qis cov pa oxygen ntawm cov hlau molten. Hauv qee cov qib steel (xws li cov hlau tsis muaj cua), phosphorus ua haujlwm nrog tooj liab thiab chromium los txhim kho atmospheric corrosion kuj.
Optimized txiav kev ua tau zoo:
Tus nqi tsim nyog ntawm phosphorus (0.03% -0.06%) tuaj yeem txhim kho lub tshuab ua haujlwm ntawm cov hlau, ua rau cov chips yooj yim dua rau kev tawg thiab txo cov cuab yeej siv los ntawm 15% -20%, ua rau nws tsim nyog rau cov hlau siv hauv tshuab tshuab tsis siv neeg.
(2) Cov kev pheej hmoo tseem ceeb: embrittlement thiab txheej txheem kev phom sij
Ua kom txias brittleness:
Phosphorus sib cais ntawm cov ciam teb nplej kom tsim qis- melting-point Fe₃P, txo cov qoob loo ciam teb thiab ua kom cov nkig hloov pauv ntawm cov hlau. Thaum cov ntsiab lus phosphorus siab tshaj 0.04%, qhov cuam tshuam toughness ntawm qis- carbon steel txo qis qis dua -20 degree, ua rau nws nquag tawg thiab tsis tsim nyog rau cov thawv kub kub, choj hlau, thiab lwm yam.
Deterioration ntawm weldability:
Phosphorus segregates nyob rau hauv weld thiab tshav kub- cuam tshuam cheeb tsam, tsim ib tug tsawg- melting- taw tes kua zaj duab xis, uas yooj yim ua rau kub tawg nyob rau hauv vuam kev nyuaj siab, txo cov weld pass tus nqi ntawm ntau tshaj 95% mus rau hauv qab 85%; Thaum cov ntsiab lus phosphorus siab tshaj 0.03%, qhov cuam tshuam rau qhov kub kub tawg tau nce ntau.
Kev txo qis ntawm plasticity:
Thaum cov ntsiab lus phosphorus ntau dua 0.05%, qhov elongation ntawm cov hlau txo los ntawm 25% mus rau qis dua 15%, thiab qhov txo qis hauv cheeb tsam txo los ntawm 40%, cuam tshuam rau cov hlau tsim thiab ua cov khoom (xws li khoov thiab stamping).
Qhov zoo, qhov tsis zoo, thiab daim ntawv thov ciam teb ntawm Ferrophosphorus hauv Casting
(1) Cov txiaj ntsig tseem ceeb: Txhim kho Molten Hlau thiab Casting Zoo
Txhim kho Iron Fluidity:
Phosphorus txo qhov nro ntawm cov hlau molten, txo cov viscosity los ntawm 15% -20%, ua kom yooj yim rau cov hlau molten los sau cov pwm kab noj hniav thiab txo qhov tsis xws luag xws li "tsis txaus filling" thiab "txias kaw." Cov ntaub ntawv los ntawm lub tuam txhab precision casting qhia tau hais tias ntxiv 0.02% -0.03% phosphorus (hauv daim ntawv ferrophosphorus) nce qhov peev txheej casting ntawm 88% mus rau 95%.
Txo Casting Defects:
Qhov sib ntxiv ntawm phosphorus refines graphite nplej, uas ua rau cov qauv zoo dua qub thiab txo qhov tshwm sim ntawm porosity thiab shrinkage defects los ntawm 30% -40%; nws yog tsim rau zus tau tej cov zoo tib yam castings ua los ntawm grey cam khwb cia hlau thiab ductile hlau, kev txhim kho cov tsos zoo thiab seem raug.
(2) Kev pheej hmoo loj: Kev poob siab thiab kev ua haujlwm tsis zoo
Txo Casting Toughness:
Excessive phosphorus (>0.05%) nce casting brittleness, txo qhov cuam tshuam toughness los ntawm 25% -35%, tshwj xeeb tshaj yog nyob rau hauv qis kub, ua rau nws tsis haum rau castings raug cuam tshuam loads (xws li cav blocks thiab engineering machinery qhov chaw).
Muaj feem cuam tshuam rau Spheroidization:
Nyob rau hauv cov hlau ductile, phosphorus cov ntsiab lus siab tshaj 0.04% inhibits graphite spheroidization, txo tus nqi spheroidization ntawm 90% mus rau qis dua 70%, ua rau muaj kev hloov pauv hauv casting zog thiab nce seem seem.
Uas Kub Cracking Risk:
Phosphorus segregation yooj yim tsim tsawg - melting - taw tes theem ntawm kub qhov chaw hauv castings, tsim thermal stress cracks thaum lub sij hawm solidification, tshwj xeeb tshaj yog ua rau muaj kev pheej hmoo ntawm kub tawg los ntawm 20% -25% nyob rau hauv complex structural castings.
Cov tswv yim tswj tseem ceeb rau kev siv Ferrophosphorus
(1) Precise Control ntawm Cov Nyiaj Ntxiv
| Daim ntawv thov Scenario | Cov ntsiab lus phosphorus siab tshaj plaws | Pom zoo phosphorus thiab hlau ntxiv | Core Control Lub Hom Phiaj |
| Tsawg-kub thawv steel, choj hlau | Tsawg dua lossis sib npaug li 0.025% | Cov khoom siv ntxiv yog txwv. | Tsis txhob txias brittleness thiab vuam tawg. |
| High-lub zog steel tuav, hnav-cov hlau tsis muaj zog | Tsawg dua lossis sib npaug li 0.045% | 0.02%-0.04% | Ntsuas lub zog thiab toughness |
| Ordinary grey cam khwb cia hlau, yooj yim castings | Tsawg dua lossis sib npaug li 0.06% | 0.02%-0.03% | Txhim kho fluidity thiab txo cov kev ua tsis xws luag |
| Hlau hlau, precision castings | Tsawg dua lossis sib npaug li 0.04% | 0.01%-0.02% | Kom tsis txhob cuam tshuam spheroidization tus nqi thiab toughness |
(2) Cov txheej txheem optimization ntsuas
Dispersed Ntxiv:Granular ferro phosphorus yog ntxiv rau cov hlau molten nyob rau hauv ib tug txaus-los ntawm txoj kev los txo lub zos enrichment thiab segregation;
Element Synergy:Ntxiv manganese (Mn / P Ntau dua lossis sib npaug rau 10) tuaj yeem cuam tshuam phosphorus grain ciam ciam sib cais thiab txo qhov kev pheej hmoo ntawm embrittlement;
Refining thiab Purification:Desulfurization thiab dephosphorization yog ua los ntawm LF furnace slag tsim los xyuas kom meej tias cov ntsiab lus phosphorus raug raws li cov qauv.
(3) Environmental thiab Safety Control
Plua plav generated thaum lub sij hawm ferrophosphoru alloy ua yuav tsum tau sau los ntawm ib lub hnab lim system (plua plav concentration tswj hauv qab no 10mg / m³) kom tsis txhob inhalation txaus ntshai;
Ib qho me me ntawm cov pa phem xws li pH₃ yuav raug tsim tawm thaum lub sijhawm smelting, yog li qhov cua zoo hauv lub rooj cob qhia yuav tsum tau ua kom ntseeg tau thiab cov neeg ua haujlwm yuav tsum hnav lub tshuab ua pa.
Qhov zoo thiab qhov tsis zoo thiab cov ntsiab lus xaiv
Tus nqi ntawm FeP alloy nyob rau hauv nws "kev hloov kho kom haum rau cov xwm txheej tshwj xeeb":Nyob rau hauv cov xwm txheej uas yuav tsum tau muaj zog, hnav tsis kam, thiab fluidity, tab sis toughness thiab weldability yuav tsum tsis siab (xws li zoo tib yam structural steel thiab yooj yim castings), tsim nyog ntxiv yuav ho txhim kho cov khoom zoo thiab ntau lawm efficiency.
Cov kev pheej hmoo tseem ceeb nyob hauv "ntau dhau thiab tsis sib haum xeeb":Rau steel / castings nyob rau hauv qis kub, cuam tshuam load, thiab vuam tej yam kev mob, ntxiv ntawm ferrophosphorus yuav tsum nruj me ntsis txwv los yog txwv.
Qhov tseem ceeb rau kev siv tswv yim:Txiav txim siab lub siab txwv ntawm phosphorus cov ntsiab lus raws li cov qauv khoom, leverage nws qhov zoo los ntawm kev tsim cov txheej txheem thiab kev ua kom zoo dua qub, thiab zam kev cuam tshuam tsis zoo xws li embrittlement.
