Tus Neeg Sawv Cev Pov Tseg Hlau Nodulizing
Cov nyhuv ntawm qhov casting yog loj heev. Vim tias qhov kub tsawg ntawm molten hlau, cov ntsiab lus ntawm leej faj thiab lwm yam tsis txaus ntseeg hauv Cupola, nws yog qhov tsim nyog los siv qib siab nodularizing tus neeg sawv cev xws li FESIMG Lore7.
Cov nyhuv ntawm qhov casting yog loj heev. Vim tias qhov kub tsawg ntawm molten hlau, cov ntsiab lus ntawm leej faj thiab lwm yam tsis txaus ntseeg hauv Cupola, nws yog qhov tsim nyog los siv qib siab nodularizing tus neeg sawv cev xws li FESIMG Lore7, FeSiMg 8re7 thiab FESIMG 8re5 Rau Cov Hluav Taws Xob Hluav Taws Xob lossis" duplex" kub hlau melting ductile hlau, tus neeg sawv cev nodularizing nrog cov ntsiab lus tsawg ntawm lub ntiaj teb tsis tshua muaj thiab cov ntsiab lus tsawg ntawm magnesium yog siv ntau, yog tias qhov tuab thiab qhov hnyav ntawm Spheroidizer 4 thiab 2 muaj Mg1-6 thiab Re4-8 sib txawv vim muaj kev sib txawv thiab txias tej yam kev mob, kev xaiv ntawm spheroidizer tuaj yeem tsis zoo li qub. Rau nyias-walled qhov me me, sai solidification, loj undercooling, haum rau kev loj hlob spheroidal graphite, tab sis kuj yooj yim heev kom tshwm carbides, nce kev nyiam ntawm lub qhov ncauj dawb, thaum cov khoom seem magnesium ntau dua 0.07%, yooj yim dua los tsim carbides, yog li nws yog qhov tsim nyog los xaiv lub ntiaj teb tsis tshua muaj siab, qis magnesium spheroidizing tus neeg sawv cev; Rau Hnyav Cov Ntsej Muag Hlau Thaj Tsho nrog cov phab ntsa tuab tshaj 100 hli, spheroidizing qhov muaj qhov tshwm sim vim qhov qis ntawm qhov ua kom tsis sib haum ntawm qhov chaw, nws yog qhov yooj yim xaiv cov qib siab nodulizer lossis nce ntxiv ntawm cov nodulizer uas yog 0.01-0.02% ntau dua li cov seem magnesium cov ntsiab lus ntawm cov hlau ductile. Tab sis lub siab tsis tshua muaj lub ntiaj teb tseem tuaj yeem ua rau qhov tshwm sim ntawm kev tawg graphite thiab lub qhov ncauj tiv thaiv dawb, yog li muaj qee qhov kev tshawb fawb ntxiv me me ntawm cov khoom tiv thaiv tsis zoo xws li 0.005% antimony, lossis bismuth, tin kom nruab nrab ntawm cov tsis tshua muaj ntau. ntiaj teb hais. Kuj tseem muaj kev xaiv ntawm yttrium-based hnyav tsawg lub ntiaj teb nodulizer, uas tiv taus kev puas siab dua li cerium-based nodulizer, cov yam tseem ceeb cuam tshuam cov ntsiab lus pearlite hauv nodular hlau yog tus qauv solidification, qhov txias npaum li cas los ntawm EUTECTOID tsam, cov ntsiab lus ntawm carbon thiab silicon, hom thiab cov ntsiab lus ntawm alloy ntsiab, thiab lwm yam. Muaj ob peb lub graphite npas thiab loj qhov loj hauv cov qauv solidification, uas tsis zoo rau cov pa roj carbon ntau qhov sib txawv, thiab nws yog qhov zoo rau nce pearlite thiab txo cov ferrite, thiab cov pa roj carbon siab nyob rau hauv austenite thiab txias npaum li cas ntawm cov casting muaj qhov nyiam kom pearlite. Cov pearlite tuaj yeem ruaj khov kho los ntawm kev siv nodulizer uas muaj cu, sb lossis ni lossis ntxiv cu, SB, Ni thiab sn rau lub hlau tsis muaj hlau. Cov ntsiab lus ntawm cov ntsiab lus no yuav tsum raug tswj rau ferritic ductile hlau. Tsis tas li ntawd xwb, vim hais tias cov khoom ntiaj teb tsis tshua muaj txiaj ntsig nce TSWV YIM TXOJ KEV TXWV TXOJ KEV HLI IRON, cov ntsiab lus tsawg ntawm Re hauv nodularizing tus neeg sawv cev yuav tsum tsis pub ntau dua 5% hauv kev tsim cov khoom noj ua si.
Si | Meb | Rov | Ca | Al | MgO | Sib npaug |
45 ~ 49 | 5.1 ~ 5.4 | 2.0 ~ 2.4 | 2.0 ~ 2.2 | GG lt; 1.0 | GG lt; 0.7 | Fe |
45 ~ 48 | 5.5 ~ 5.8 | 1.9 ~ 2.3 | 2.3 ~ 2.6 | GG lt; 1.0 | GG lt; 0.7 | Fe |
49 ~ 52 | 6.5 ~ 7.0 | 0.8 ~ 1.2 | 0.5 ~ 0.7 | GG lt; 1.0 | GG lt; 0.7 | Fe |
43 ~ 46 | 7.5 ~ 8.5 | 2.5 ~ 3.5 | 2.5 ~ 3.5 | GG lt; 1.0 | GG lt; 0.7 | Fe |
45 ~ 50 | 10.0 ~ 12.0 | 3.5 ~ 4.0 | 3.5 ~ 4.5 | GG lt; 1.0 | GG lt; 0.7 | Fe |
44 ~ 48 | 5.2 ~ 5.8 | (La) 0.25 ~ 0.4 | 0.4 ~ 0.6 | GG lt; 1.0 | GG lt; 0.7 | Fe |
44 ~ 48 | 6.8 ~ 7.2 | (Ce) 0 ~ 0.1 | 0.8 ~ 1.0 | GG lt; 1.0 | GG lt; 0.7 | Fe |
Cim npe nrov: cam khwb cia hlau nodulizing tus neeg sawv cev, Tuam Tshoj, lwm tus neeg, Hoobkas, yuav, hais, ua nyob rau hauv Suav teb
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