Tshawb xyuas kev sib raug zoo ntawm cov hmoov dawb corundum thiab alumina

Ntau cov tuam ntxhab ntawm cov khoom hnav-tiv taus xav tau dawb corundum hmoov, tab sis dab tsi yog txoj haujlwm ntawm cov hmoov dawb corundum, nws tsim li cas, thiab kev sib raug zoo ntawm cov hmoov dawb corundum thiab alumina? Tom ntej no, peb yuav ua qhov kev soj ntsuam tob ntawm kev sib raug zoo ntawm ob leeg.

Dawb corundum yog ntau hom abrasive corundum series hauv cov khoom abrasive. Kev sib raug zoo ntawm dawb corundum hmoov thiab alumina yog tias nws yog tsim los ntawm high-temperature smelting nrog alumina hmoov raws li lub ntsiab raw khoom. Cov ntsiab lus ntawm Al2O3 feem ntau yog 97% -99%, uas yog dawb. Dawb corundum muaj hardness siab, lub abrasive tsis yooj yim rau blunt, thiab nws toughness yog me ntsis qis dua li cov xim av corundum. Cov nplej abrasive tau yooj yim tawg nyob rau hauv siab los tsim cov txiav tshiab. Vim tias cov abrasive muaj zog dua li xim av corundum, nws yooj yim dua los txiav rau hauv cov khoom siv ua haujlwm, thiab cov nplej abrasive muaj qhov ua tau zoo ntawm tus kheej, yog li cov dawb corundum abrasive muaj peev xwm txiav tau zoo, uas tuaj yeem txo cov haujlwm deformation thiab kub tsim.

Yog li ntawd, dawb corundum abrasives yog tsim rau precision sib tsoo, sharpening, xov sib tsoo, thiab lwm yam, thiab sib tsoo workpieces uas yog yooj yim deformed thiab hlawv, xws li precision sib tsoo ntawm hardened steel, high-speed steel, high-carbon steel, thiab nyias. -walled qhov chaw. Dawb corundum muaj cov qauv micro-nplaum, haum rau daim iav sib tsoo. Nyob rau tib lub sijhawm, dawb corundum kuj muaj cov yam ntxwv ntawm cov kua qaub thiab alkali corrosion kuj, kub tsis kam, thiab zoo thermal stability. Nws yog dav siv nyob rau hauv high-tech teb xws li precision casting, steel refractory, tshuaj refractory, tshwj xeeb ceramics, porcelain rau siv niaj hnub, tub rog kev lag luam, thiab electronics.

Cov ntsiab lus sodium oxide nyob rau hauv cov dawb corundum yog nruab nrab ntawm 0.2 thiab 0.6%. Kev sib raug zoo ntawm cov hmoov dawb corundum thiab alumina. Sodium oxide yog ib qho teeb meem impurity rau dawb corundum. Nws tsim β-Al2O3 nyob rau hauv lub xeev molten nrog alumina, thiab tus nqi ntawm kev tsim nce nrog nce ntawm sodium oxide cov ntsiab lus.

Nrog rau txoj kev loj hlob sai ntawm kev lag luam rau high-end abrasives, hluav taws xob ceramics thiab high-end refractory cov ntaub ntawv, txo cov sodium cov ntsiab lus nyob rau hauv dawb corundum tau dhau los ua ib qho tseem ceeb kev tshawb fawb taw qhia rau kev txhim kho qhov zoo ntawm dawb corundum. Muaj ntau txoj hauv kev rau kev tshem tawm sodium hauv corundum dawb, xws li tshem tawm sodium los ntawm cov khoom siv raw, ncaj qha mus yuav cov khoom siv uas tsis muaj sodium alumina raw khoom, lossis tshem tawm sodium los ntawm high-sodium alumina raw cov ntaub ntawv. Cov tuam txhab tsim khoom siv nws hauv cov khoom siv loj.