DESCRIPTION:
Ultrasonic grain refinement khoomLub luag haujlwm tseem ceeb hauv cov txheej txheem ntawm kev kho aluminium melting yog: refining hlau nplej, homogenizing alloy muaj pes tsawg leeg, txhim kho lub zog thiab qaug zog tiv thaiv ntawm cov ntaub ntawv casting, txhim kho cov khoom zoo ntawm cov ntaub ntawv, txo kev siv cov nplej refiners thiab txo cov nqi.

1. Ultrasonic suav nrog tshem tawm

Nws yog ib qho nyuaj heev rau kev daws cov hlau kom ntab ntawm cov me me.Tsuas yog thaum lawv sib sau ua ke lawv tuaj yeem ntab.Thaum kev kho ultrasonic ntawm cov tshuaj txhuas, cov me me tuaj yeem muab txheej thiab sib sau ua ke.Nrog grain refiner, loj particle inclusions ntab mus rau tshem tawm impurities.

2. Ultrasonic degassing

Thaum lub elastic vibration yog nkag mus rau hauv cov hlau molten, cavitation tshwm sim, uas yog vim cov kab noj hniav generated tom qab lub continuation ntawm cov kua theem yog tawg, yog li cov roj yaj nyob rau hauv cov kua hlau concentrates mus rau lwm qhov chaw.Vim lub elastic vibration ntawm ultrasonic, lub npuas core yog generated thiab loj hlob tsis tu ncua mus txog rau thaum nws yuav raug tso tawm los ntawm cov hlau molten.

3. Cov nyhuv ntawm ultrasonic yoj ntawm qhov zoo ntawm casting embryo

Thaum lub ultrasonic vibration solidification txoj kev yog siv los tsim castings, lub ultrasonic yoj yuav tsim lub alternating suab siab ntawm tus chij thiab tsim ib tug dav hlau.Vim tias cov nyhuv nonlinear, cov npoj yaig yuav tsim cov suab nrov thiab cov suab micro ntws, thaum lub sij hawm ultrasonic khoob lus yuav tsim lub dav hlau ceev ntawm qhov sib cuam tshuam ntawm cov khoom thiab cov kua.Tag nrho cov teebmeem no tuaj yeem txiav thiab rhuav tshem dendrites, Txhua qhov chaw muaj suab nrov hauv cov kua, nws ua lub luag haujlwm.Siv cov nyhuv cavitation hauv cov txheej txheem no, nws tuaj yeem ntxuav cov qauv, ua kom zoo dua cov khoom thiab homogenize cov qauv.Ntxiv nrog rau cov nyhuv mechanical tshwm sim los ntawm kev co los rhuav tshem cov dendrites, lwm lub luag haujlwm tseem ceeb ntawm ultrasonic kev co solidification yog los txhim kho qhov zoo supercooling ntawm cov kua hlau.Qhov tseem ceeb nucleus radius raug txo.Yog li, tus nqi ntawm nucleation yog nce thiab cov nplej yog refined.

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