Txoj kev doping yog ib txoj kev ib txwm siv rau meltingscandium intermediate alloys. Nws suav nrog qhwv ib qho kev faib ua feem ntawm high-purityhlau scandiumnyob rau hauv txhuas, ces sib tov nws nrog molten txhuas nyob rau hauv argon tiv thaiv, tuav nws rau ib lub sij hawm txaus, nplawm nws kom huv si, thiab muab nws mus rau hauv ib tug hlau los yog txias tooj liab pwm kom tau.scandium intermediate alloys. Melting yuav ua tau siv high-purity graphite los yog alumina crucibles, thiab cov cua kub txoj kev yuav ua tau siv cov kuj furnaces los yog nruab nrab zaus induction furnaces. Txoj kev no tuaj yeem yaj cov hlau nruab nrab uas muaj 2% mus rau 4%scandium.
Lub hauv paus ntsiab lus ntawm txoj kev doping yog yooj yim, tab sis cov ntsiab lus melting ntawmscandiumthiab txhuas sib txawv heev (Sc yog 1541 ℃, A1 yog 660 ℃). Aluminium melts yuav tsum tau overheated mus rau ib tug ntau dua kub, ua rau nws nyuaj los npaj cov khoom nruab nrab ntawm cov alloy nrog ruaj khov muaj pes tsawg leeg thiab kev faib ua feem, thiab nws kuj yog ib qho nyuaj kom tsis txhob hlawv ntawm scandium. Yuav kom ua tiav qhov no, txoj kev txhim kho yog sib tov thiab nias lub siab melting point hlau scandium nrog dispersant, aluminium hmoov, flux, thiab lwm yam ua ntej thaum lub sij hawm npaj, thiab ces ntxiv rau hauv cov hlau molten. Lub dispersant decomposes ntawm qhov kub thiab txias, cia li crushing lub agglomerates, uas yuav ua tau ib tug uniform alloy thiab txo qhov kub ntawm qhov kub melting point hlau. Tab sis tag nrho, tus nqi ntawm kev npajscandium intermediate alloyssiv high-purityscandium hlauraws li cov khoom siv raw yog qhov siab, uas yog qhov nyuaj rau cov neeg siv khoom siv los txais.
Post lub sij hawm: Nov-24-2023