Vim li cas silicon carbide hmoov dub thiab ntsuab?

Dub silicon carbideyog tsim los ntawm quartz xuab zeb, roj av coke, thiab siab - zoo silicon dioxide raws li cov ntaub ntawv tseem ceeb, melted ntawm qhov kub thiab txias nyob rau hauv lub cub tawg. Cov khoom siv raw rau ntsuab silicon carbide zoo ib yam li cov dub silicon carbide, tshwj tsis yog tias muaj ntsev ntxiv los ua cov reactant thiab catalyst, thiab cov tshuaj tiv thaiv yuav tshwm sim nyob rau hauv lub cub tawg. Vim nws cov xim ntsuab, nws hu ua ntsuab silicon carbide. Dhau li ntawm qhov sib txawv ntawm cov xim, feem ntau hais lus, ntsuab silicon carbide muaj qhov zoo dua sharpness, thaum dub silicon carbide muaj zog dua.

Lawv siv kuj txawv. Ntsuab silicon carbide muaj ib tug ntshiab kev ntxhib los mos thiab siab hardness dua dub silicon carbide. Nws cov kev sib tsoo siv yog tib yam li dub silicon carbide, tab sis nws yog qhov tsim nyog rau kev sib tsoo zoo ntawm cov ntaub ntawv xws li xov sib tsoo thiab cov cuab yeej sib tsoo. Cov khoom sib tsoo muaj ntau yam kev siv, haum rau kev sib tsoo workpieces ua los ntawm cemented carbide thiab pob zeb diamond khoom. (Ferroalloy.com) Dub silicon carbide yog tsim los ntawm quartz xuab zeb, roj av coke, thiab siab - zoo silicon dioxide raws li cov ntaub ntawv tseem ceeb, melted ntawm qhov kub thiab txias nyob rau hauv lub cub tawg kuj.

Kev tsim cov khoom siv raw rau ntsuab silicon carbide yog ib yam zoo ib yam li cov dub silicon carbide, tshwj tsis yog tias muaj ntsev ntxiv los ua cov reactant thiab catalyst, thiab cov tshuaj tiv thaiv yuav tshwm sim hauv qhov cub tsis kam. Vim nws cov xim ntsuab, nws hu ua ntsuab silicon carbide. Dab tsi yog qhov txawv ntawm dub thiab ntsuab? Dhau li ntawm qhov sib txawv ntawm cov xim, feem ntau hais lus, dub silicon carbide muaj zoo toughness. Kev siv ntawm silicon carbide kuj txawv. Ntsuab silicon carbide muaj ib tug ntshiab kev ntxhib los mos thiab siab hardness dua dub silicon carbide. Nws cov kev sib tsoo siv yog tib yam li dub silicon carbide, tab sis nws yog qhov tsim nyog rau kev sib tsoo zoo ntawm cov ntaub ntawv xws li xov sib tsoo thiab cov cuab yeej sib tsoo. Cov khoom sib tsoo yog siv dav rau cov khoom ua haujlwm ua los ntawm cov cemented carbide thiab pob zeb diamond khoom.

Vim li cas kev lag luam silicon carbide tshwm dub lossis ntsuab? Ib qho kev pom yog vim li cas silicon carbide zoo li dub yog tias cov muaju yog coated nrog cov pa roj carbon me me. Yog tias tsis muaj ntsev ntxiv, vim tias silicon dioxide volatilizes sai, cov khoom siv carbonaceous tsis muaj sij hawm los cuam tshuam nrog nws, ua rau qee qhov silicon dioxide vapor khiav tawm, thiab cov khoom siv carbonaceous tsis tau ua tiav, tawm hauv cov pa roj carbon me me hauv cov khoom siv silicon carbide uas twb muaj lawm. Hauv kev tsim cov ntsuab silicon carbide, nws feem ntau hais tias yuav tsum tau ntxiv ntsev ntau dua piv rau cov smelting dub silicon carbide, vim tias ntsev tuaj yeem txhawb cov xim ntsuab ntawm cov khoom silicon carbide.

Txawm li cas los xij, tom qab kev sim ntev ntev -, qee cov tuam txhab tau pom tias yog cov khoom siv raw muaj ntau cov impurities (aluminium, calcium, magnesium, boron, thiab lwm yam), nws yog tsis yooj yim sua kom smelt ntsuab silicon carbide. Hloov pauv, yog tias cov khoom siv raw yog cov purity siab, ci ntsuab silicon carbide tuaj yeem smelted yam tsis ntxiv ntsev. Qee lub sij hawm, ntxiv ntsev thaum lub sij hawm smelting ntawm ntsuab silicon carbide tuaj yeem muaj qee qhov kev mob tshwm sim, xws li kev tawm ntawm cov khoom siv hluav taws xob ntau ntxiv thiab lub tshuab hluav taws xob hauv lub cev, thiab nce corrosion ntawm cov cuab yeej siv thiab kev cob qhia. Yog li ntawd, yuav tsum tau saib xyuas ntau dua rau kev siv ntsev thaum lub sij hawm silicon carbide smelting txheej txheem.