Dub silicon carbideyog hexagonal siv lead ua nrog microhardness ntawm 2840-3320kg/mm2thiab lub ntiajteb txawj nqus ntawm 3.20-3.25. Yog tias nws yog cov ntshiab dub silicon carbide, nws yuav tsum yog cov xim tsis muaj xim thiab pob tshab. Txawm li cas los xij, kev lag luam dub silicon carbide yuav tshwm dub vim nws muaj impurities.
Tom qab smelting, dub silicon carbide blocks yog tau, uas yuav tsum tau mus los ntawm cov txheej txheem xws li crushing, kua qaub thiab alkali ntxuav, sib nqus sib nqus thiab tshuaj ntsuam xyuas los yog dej sib cais kom ntau particle loj.
1. SiC cov ntsiab lus ntawm dub silicon carbide yog hais txog 98.5%. Nws lub zog yog siab dua li ntawm ntsuab silicon carbide, yog li nws yog qhov tsim nyog rau kev ua cov ntaub ntawv uas tsis muaj zog tensile xws li iav, ceramics, pob zeb, cov ntaub ntawv refractory, cam khwb cia hlau thiab cov hlau tsis muaj hlau.
2. Cov ntsiab lus SiC ntawm ntsuab dub silicon carbide yog ntau tshaj 99%, thiab nws tus kheej-ntse yog zoo heev. Nws feem ntau yog siv los ua cov cemented carbide, titanium alloy thiab optical iav. Nws kuj yog tsim rau honing lub tog raj kheej liner thiab zoo sib tsoo high-speed steel cov cuab yeej.
Lub daj-ntsuab siv lead ua los ntawm cov txheej txheem tshwj xeeb yog cubic silicon carbide. Pawg no yog tsim los ua cov cuab yeej abrasive thiab tuaj yeem siv rau kev ua haujlwm zoo ntawm cov kabmob. Feem ntau, qhov roughness ntawm lub workpiece tuaj yeem ua tiav los ntawm Ra32-0.16 microns rau Ra0.04-0.02 microns ib zaug.
Dub silicon carbide muaj cov tshuaj zoo stability, siab thermal conductivity, me me thermal expansion coefficient, thiab zoo heev hnav tsis kam, yog li nws tsis tsuas yog siv los ua abrasive, tab sis kuj rau lwm lub hom phiaj. Piv txwv li: txheej txheej dub silicon carbide hmoov rau ntawm phab ntsa sab hauv ntawm lub turbine impeller lossis lub tog raj kheej lub cev tuaj yeem txhim kho qhov hnav tsis kam ntawm cov txheej txheem ua haujlwm thiab txuas ntxiv lub neej kev pab cuam ntawm lub workpiece los ntawm 1-2 zaug; vim nws muaj cov thermal poob siab zoo, me me, lub teeb yuag, siab zog, thiab tshwj xeeb tshaj yog lub zog txuag, nws tuaj yeem ua rau cov ntaub ntawv qib siab refractory.
Qib qis dub silicon carbide yog ib qho zoo heev deoxidizer, uas tuaj yeem ua kom cov hlau ua kom zoo dua qub thiab txhim kho cov hlau zoo. Tsis tas li ntawd, dub silicon carbide kuj tuaj yeem ua rau hluav taws xob cua sov-silicon carbon rods. Dub silicon carbide yog cov khoom siv semiconductor zoo vim nws qhov siab hardness thiab zoo thermal conductivity.
