Hais txog dawb corundum
Txhua leej txhua tus paub hais tias dawb corundum muaj cov yam ntxwv ntawm siab hardness, muaj zog hnav tsis kam, kub tsis kam, thiab lwm yam, ib tug neeg nug xws li ib lo lus nug, puas yog dawb corundum frit tib yam li dawb corundum?
Cov yam ntxwv ntawm cov dawb corundum frit:
1, dawb corundum frit txheej sab sauv: tseem hu ua lub hau, muab faib ua ob feem ntawm lub hauv paus sab saud, cov qauv sab saud yog nruj thiab ruaj khov, muaj cov pob zeb zoo nkauj, lub hauv paus muaj cylindrical qhov ntawm cov muaju zoo. Dawb corundum frit qauv yam ntxwv
2, dawb corundum frit core: cov qauv ntawm cov tub ntxhais tseem yog nruj thiab ruaj khov, thiab cov porosity loj dua. Nws yuav tsum raug sau tseg tias cov tub ntxhais ntawm cov dawb corundum frit muaj ntau cov iav iav nrog lub qhov thiab cov duab sib txawv, thiab cov khoom tseem ceeb ntawm cov muaju yog -AI203.
3. Qhov nruab nrab thiab qis ntawm cov dawb corundum frit: cov khoom siv lead ua ntawm lub hauv paus yog ntxhib, tab sis cov qauv tseem nruj, thiab xim yog xim dawb thiab zoo.
4, dawb corundum frit ntug: nruab nrab thiab qis muaju tsis nruj li ob txheej sab sauv, me ntsis xoob, thiab cov muaju feem ntau yog columnar lossis granular, nrog pores thiab microcrystalline crystals ntawm ntug.
Nyob rau xyoo 1970, ntau tshaj 500 qhov chaw ntawm cov ntaub ntawv hnav-tiv taus tau thermal sprayed nyob rau hauv lub cav aviation turbine, thiab ntau tshaj 2, 000 qhov chaw ntawm cov ntaub ntawv hnav-resistant tau thermal sprayed nyob rau hauv niaj hnub tshiab turbine engine, txog 3 , 000 chaw. Lub thermal txau ntawm cov ntaub ntawv hnav-tiv taus ntawm qhov chaw tau dhau los ua ib qho tseem ceeb thiab tseem ceeb txheej txheem thev naus laus zis hauv kev lag luam aviation.
Hnav-resistant cov ntaub ntawv xws li dawb corundum nyob rau hauv lub aviation kev lag luam yog cov thaum ntxov daim ntawv thov ntawm thermal spraying technology txheej departments, tab sis kuj daim ntawv thov ntawm thermal spraying technology ntau thiab ntau muaj kev vam meej high-tech teb. Nrog rau kev nce qib ntawm thermal spraying technology, xws li kev txhim kho tsis tu ncua ntawm cov ntaub ntawv txheej txheej zoo, tsis tshua muaj siab plasma txau, cov nplaim hluav taws kub ceev tshuab tau tawm ib tom qab, thiab cov txheej txheem zoo tau ua kom muaj txiaj ntsig zoo. Kev siv cov thev naus laus zis thev naus laus zis hauv kev lag luam aviation kuj yog ntau thiab ntau dua.
Lub ntim ntim ntawm cov dawb corundum abrasive yog 1. Feem ntau, coarse-grained abrasives 1 Muaj qhov ntim ntau dua li cov khoom zoo-grained abrasives. Cov ntim ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom nti :Qhov tseeb densasy.Qhov tseeb}} g / cm3, thiab lub Qhov tseeb ntom ntom ntawm abrasive yog hais txog qhov loj ntawm abrasive muaj nyob rau hauv chav tsev ntim (tsis suav nrog lub ntim ntawm qhov qhib). Cov dawb corundum abrasive ntawm cov khoom siv refractory muaj siab purity, zoo tus kheej ntse, acid thiab alkali corrosion kuj, kub tsis kam thiab ruaj khov thermal ua haujlwm. Nws hardness yog me ntsis siab dua li cov xim av corundum, toughness yog me ntsis qis, purity siab thiab nws tus kheej-sharpening yog zoo. Muaj zog sib tsoo muaj peev xwm, tsis tshua muaj cua sov, ua haujlwm siab, acid thiab alkali corrosion kuj, kub tsis kam, zoo thermal stability.
