Cov teeb meem xav tau kev saib xyuas thaum lub tshuab nqus tsev ntawm sintered ntxaij lim dej lub caij

Jun 24, 2020

Thaum lub tshuab nqus cov txheej txheem ntawm qhov sintered ntxaij lim caij, peb pom tseeb hloov ntawm lub tshuab nqus tsev kawm ntawv feem ntau tuaj yeem pom, uas yog, peb qhov kev tso pa tawm loj hauv cov roj av cemented carbide sintered lub cev.

Qhov kub ntawm qhov degree nqus tsev pauv rau thawj thawj zaug yog li 350 ° C. Cov laj thawj tseem ceeb yog: thawj, cov roj tso tawm rau ntawm cov nplaim hluav taws yog desorbed nyob rau hauv tus ntawm kub thiab tsis zoo siab; qhov thib ob, tus neeg sawv cev xa tawm hauv cov kab hluav taws xob volatilizes.

Qhov kub ntawm cov degree ntawm lub tshuab nqus tsev hloov pauv rau qhov thib ob yog li 1 100 ° C. Qhov laj thawj tseem ceeb ntawm kev hloov pauv qhov tseem ceeb hauv lub nqus tsev ntawm lub tshuab nqus tsev yog tias cov oxides hauv kev cog lus yog qhov txo qis los ntawm cov pa roj carbon (qhov ntsuas kub ntawm WO3, TiO2 thiab C yog 993 ° C thiab 1103 ° C, feem). Tsim kom muaj cov pa roj CO.

Qhov kub ntawm qhov thib peb nqus hloov ntawm lub sintered ntxaij lim keeb feem ntau pom ntawm 1350 ℃. Lub sijhawm no, qhov cub hluav taws kub tau siab tshaj qhov ntsuas kub eutectic, thiab theem kua tau tshwm nyob rau hauv lub cev sintered. Hauv lub xeev nqus, cov kua nplaum nplaum theem yog qhov nrawm rau volatilization poob. Ob txoj kev xav thiab kev coj ua qhia pom tias lub tshuab ua kom sov lub siab, qhov kub siab sintering siab, lub sijhawm sintering ntev, cov ntsiab lus ntawm theem kev sib raug zoo yog siab, thiab cov pa roj carbon ntsiab lus nyob hauv lub cev sintered yog siab, qhov ntau dua qhov poob ntawm kev ua kom sib luag. theem volatilization.