Kev siv dav dav ntawm huab cua atomization hmoov ua khoom siv

Atomization hmoov cov khoom siv yog ib txoj kev npaj hmoov uas siv cov kua dej nrawm nrawm (atomizing nruab nrab) los cuam tshuam los yog ua rau cov hlau molten los yog alloy rau hauv cov dej zoo, uas tom qab ntawd condense rau hauv cov hmoov hmoov. Atomization yog txoj kev zoo tshaj plaws rau kev tsim cov hmoov nplej siab, cov khoom uas hu ua pre-alloyed hmoov. Txhua qhov ntawm cov hmoov no tsis tsuas yog muaj tib yam tshuaj lom neeg muaj pes tsawg leeg raws li cov khoom siv molten alloy, tab sis kuj muaj cov qauv ua kom zoo nkauj crystalline vim kev ua kom khov sai; macroscopic cais ntawm theem ob yog tshem tawm.

Gas Atomization Hmoov Cov Khoom Siv Tsim Khoom

Kev siv cov khoom siv Atomization hmoov:

Txoj kev siv dav tshaj plaws yog roj atomization thiab dej atomization. Nyob rau hauv atomization hmoov ntau lawm, cov hlau raw khoom yog thawj melted rau hauv ib tug tsim nyog alloy kua (feem ntau superheated rau 100-}150 degree) siv lub cub hluav taws xob los yog induction rauv, thiab ces txhaj rau hauv ib tug tundish nyob rau hauv lub atomizing nozzle. Cov kua alloy ntws tawm hauv qab ntws ntawm tundish, thiab thaum dhau los ntawm lub nozzle, nws ntsib cov cua kub ceev los yog dej ntws thiab yog atomized rau hauv cov dej zoo. Lub atomized droplets sai sai solidify rau hauv cov hmoov txhuas nyob rau hauv lub kaw atomization lub tog raj kheej.

Feem ntau, cov roj inert atomized hmoov yog kheej kheej nrog cov ntsiab lus qis tshaj plaws (hauv qab 100 × 10⁻⁶), tso cai rau cov thermoforming ncaj qha (piv txwv li, kub isostatic nias) los tsim cov khoom denser. Cov dej atomized hmoov feem ntau tsis zoo nyob rau hauv cov duab nrog cov ntsiab lus oxygen siab (siab tshaj 600 × 10⁻⁶), yuav tsum tau muab tshuaj txhuam. Txawm li cas los xij, lawv muaj compressibility zoo heev, tso cai rau txias nias thiab tom qab sintering rau hauv cov khoom siv tshuab.

Txawm hais tias aforementioned atomization hmoov ntau lawm txoj kev yog tsim rau loj -scale industrial ntau lawm, kev sib cuag ntawm cov molten alloy thiab slag thiab refractory crucible inevitably qhia tsis yog -hlau inclusions rau hauv cov hmoov nplej. Yog li ntawd, raws li lub hauv paus ntsiab lus ntawm electroslag remelting (ESR), lub tuam txhab hmoov thawj hloov ib tug 7-tundish tundish mus rau hauv ib tug electroslag cua sov (ESH) ntaus ntawv, txo tus nqi ntawm cov non-hlau inclusions nyob rau hauv nitrogen- atomized siab- ceev steel hmoov mus rau 1/10 ntawm nws cov nqi qub, muaj flexural zog ntawm ASP hmoov high-speed steel los ntawm 3500 MPa mus rau ntau tshaj 4000 MPa.