Vim tias nws cov tshuaj muaj zog ruaj khov, muaj cov thermal conductivity, tsawg thermal expansion coefficient thiab zoo hnav tsis kam, silicon carbide muaj ntau lwm daim ntawv thov dua li cov abrasives, xws li txheej silicon carbide hmoov ntawm turbine impeller lossis lub tog raj kheej thaiv los ntawm cov txheej txheem tshwj xeeb. Sab hauv phab ntsa tuaj yeem txhim kho qhov hnav tsis kam thiab ua kom ntev lub neej ntawm kev pab cuam los ntawm 1 mus rau 2 zaug; cov khoom siv thev naus laus zis ntxiv rau kev tsim cov khoom yog tshav kub, me me hauv ntim, lub teeb hauv qhov hnyav thiab siab hauv lub zog, thiab muaj lub zog zoo-txuag cov nyhuv. Qib qis silicon carbide (txog 85% SiC) yog qhov zoo tshaj plaws deoxidizer, uas ua kom nrawm dua hlau thiab ua kom yooj yim tswj kev tswj tshuaj lom neeg thiab zoo ntawm cov hlau. Tsis tas li ntawd, silicon carbide kuj tseem siv los ua silicon carbide cov pas nrig rau hluav taws xob cua sov ua ke.
Muaj ntau cov lus txiav txim rau cov xim dub silicon carbide hmoov, tab sis cov nyiaj siv tsis ntau. Yog li ntawd, tsis muaj ntau cov khoom tsim tawm hauv kev ua lag luam. Feem ntau hais lus, qhov loj me ntawm silicon carbide siv los ntawm cov tsim khoom lag luam yog feem ntau ntawm 240 mesh thiab 400 mesh. Finer, kev ua lag luam yog kev ua tiav tsawg.
Silicon carbide hmoov yog cov hmoov ua tiav cov khoom ua tiav los ntawm kev siv lub tshuab milling, uas yog SiC hmoov lossis silicon carbide hmoov zoo nkauj. Raws li cov ntsiab lus thiab cov yam ntxwv ntawm silicon carbide, nws muab faib ua: cov xim dub silicon carbide hmoov thiab ntsuab silicon carbide hmoov.
Kev faib tawm thiab siv:
1. Dub silicon carbide: thawj cov hmoov av, theem nrab thiab tertiary silicon carbide hmoov. Mas siv rau hauv cov ntaub ntawv refractory, abrasives, casting, sandblasting, polishing, ceramics thiab lwm yam kev lag luam thiab metallurgical silicon carbide deoxidizer.
2. Silicon carbide plua plav hmoov: Nws muab faib ua dub silicon carbide plua plav hmoov thiab ntsuab silicon carbide plua plav hmoov. Nyob rau hauv kev tsim ua ntawm ntsuab silicon carbide micropowder, ntau ntawm cov hmoov av hmoov av yog tsim. Nws daim ntawv thov yog qhov dav heev, tsis tsuas yog txuag lub zog, tab sis kuj tsim cov txiaj ntsig kev lag luam ntau. Lub plua plav hmoov cov ntsiab lus ntawm ntsuab silicon carbide 2 # chaw nres nkoj yog ntau dua 95%, thiab cov ntsiab lus ntawm 3 # chaw nres nkoj ntau dua 90%. Nws yog cov khoom zoo heev rau cov khoom siv refractory thiab lub rwb thaiv tsev thermal.
Kev ua tau zoo thiab nta:
Silicon carbide hmoov yog xim dub, nkig thiab ntse, thiab muaj cov zoo thermal conductivity thiab hluav taws xob conductivity. Lub microscopic duab yog hexagonal crystal, thiab Mohs hardness ntawm silicon carbide yog 9.2, Vickers microhardness, Knoop hardness, microhardness. Nws yog siab dua corundum nyob rau hauv abrasives thiab yog thib ob rau pob zeb diamond, cubic boron nitride thiab boron carbide. Cov ntom ntuag feem ntau suav tias yog 3.20 g / mm3, thiab lub ntuj ntom ntom ntom ntawm cov khoom siv silicon carbide abrasive yog nruab nrab ntawm 1.2 thiab 1.6 g / mm3, thiab lub zog nqus tshwj xeeb yog 3.20 txog 3.25. Dub silicon carbide yog ua los ntawm roj av coke thiab zoo silica yog cov khoom siv tseem ceeb, ntxiv ntsev ua cov roj ntxiv thiab smelting los ntawm hluav taws xob cua sov ntawm qhov kub. Piv nrog ntsuab silicon carbide, dub silicon carbide muaj qhov ua kom huv dua, qhov muaj tawv tawv thiab txhuam.
