Lub peev xwm filling ntawm molten hlau, tseem hu ua fluidity, yog ib qho tseem ceeb ntawm cov txheej txheem casting. Nws yog hais txog lub peev xwm ntawm molten hlau los sau cov pwm kab noj hniav kom tiav ua ntej solidification. Kev nkag siab thiab ua kom zoo dua cov cuab yeej no yog qhov tseem ceeb rau kev tsim cov khoom zoo tshaj plaws nrog cov geometry intricate thiab tsis xws luag.
Lub tswv yim tseem ceeb ntawm Kev Sau Muaj Peev Xwm
Lub peev xwm filling ntawm molten hlau txiav txim siab npaum li cas cov hlau ntws mus rau hauv thiab sau cov ntsiab lus sib txawv ntawm cov pwm. Nws yog cuam tshuam los ntawm ntau yam xws li cov hlau muaj pes tsawg leeg, qhov kub thiab txias, thiab tsim pwm. Kev muaj peev xwm ua kom zoo ua kom ntseeg tau tias qhov kawg casting yog dawb los ntawm qhov tsis xws luag xws li misruns, txias kaw, thiab tsis tiav seem. Cov cuab yeej no yog ib qho tseem ceeb tshwj xeeb hauv kev tsim cov txheej txheem ntawm cov phab ntsa nyias thiab cov khoom siv nrog cov geometry nyuaj.
Cov yam ntxwv cuam tshuam rau kev muaj peev xwm sau
1.Hlau Composition: Cov tshuaj muaj pes tsawg leeg ntawm cov hlau molten plays lub luag haujlwm tseem ceeb hauv nws cov fluidity. Cov hlau uas muaj cov ntsiab lus melting qis feem ntau muaj fluidity zoo dua.
2.Kub: Qhov kub ntawm cov hlau molten yog ncaj qha proportional rau nws fluidity. Kev kub siab dua txo cov viscosity ntawm cov hlau, ua kom nws muaj peev xwm ntws mus rau hauv pwm. Txawm li cas los xij, qhov kub thiab txias ntau dhau tuaj yeem ua rau muaj zog oxidation thiab nqus pa, uas tuaj yeem ua rau muaj qhov tsis xws luag hauv qhov casting.
3.Pwm Tsim: Cov qauv tsim thiab cov khoom siv ntawm cov pwm cuam tshuam rau lub peev xwm filling. Lub pwm nrog cov npoo du thiab cov kab txaij tsim nyog ua kom yooj yim ntws zoo.
4.Pouring Rate: Tus nqi ntawm cov hlau molten yog nchuav rau hauv pwm cuam tshuam nws lub peev xwm los sau cov kab noj hniav. Kev tswj hwm thiab sib npaug ntawm qhov sib xyaw ua kom ntseeg tau tias cov hlau tswj nws qhov kub thiab txias yam ntxwv, tiv thaiv kom ntxov ntxov solidification.
5.Cov tshuaj ntxiv: Qee cov tshuaj ntxiv tuaj yeem qhia tau los txhim kho cov dej ntws ntawm cov hlau molten. Piv txwv li, silicon feem ntau ntxiv rau aluminium alloys los txhim kho lawv cov fluidity, ua rau lawv tsim nyog rau cov txheej txheem nyuaj.
Kev ntsuas los txhim kho kev muaj peev xwm ua tiav
1.Optimal Alloy xaiv: Xaiv cov alloys nrog cov khoom muaj txiaj ntsig zoo fluidity yog thawj kauj ruam ntawm kev txhim kho lub peev xwm filling. Piv txwv li, aluminium-silicon alloys nyiam rau lawv cov fluidity superior thiab yooj yim ntawm casting.
2.Kev Tswj Kub Kub: Kev tswj xyuas qhov ntsuas kub zoo ntawm cov hlau molten thoob plaws hauv txheej txheem casting yog qhov tseem ceeb. Preheating pwm thiab tswj qhov kub thiab txias tuaj yeem txhim kho fluidity. Kev siv cov ntsuas kub ntsuas ntsuas yuav pab ua kom tau txais txiaj ntsig zoo ib yam.
3.Txhim kho pwm tsim: Kev tsim cov pwm nrog qhov chaw du, lub qhov cua txaus, thiab cov txheej txheem kev sib txuas zoo tuaj yeem pab txhawb cov hlau ntws zoo dua.
4.Kev siv cov Inoculants thiab Fluxes: Ntxiv inoculants tuaj yeem txhim kho cov qauv ntawm cov hlau, txhim kho nws cov fluidity. Fluxes kuj tseem siv tau los tshem tawm cov impurities thiab txo qhov nro, txhim kho cov yam ntxwv ntws ntawm cov hlau molten.
5.Degassing: Tshem tawm cov roj yaj ntawm cov hlau molten tuaj yeem tiv thaiv kev tsim ntawm npuas thiab voids, txhim kho tag nrho cov peev txheej filling.
6.Tswj Pouring Techniques: Siv cov tshuab nchuav ua kom muaj qhov sib xws thiab tswj tau ntawm cov hlau molten rau hauv pwm. Qhov no txo qhov muaj feem ntawm kev kub ntxhov thiab txias kaw, ua rau muaj peev xwm ua kom zoo dua.
Post lub sij hawm: Nov-08-2024