Muaj ob hom abrasives: natural abrasives thiab artificial abrasives
Pob zeb diamond yog cov khoom siv tawv tshaj plaws nyob rau hauv qhov xwm txheej thiab muaj qhov sib zog ua kom muaj zog (Knoop hardness ntawm 7000-8000), uas yog raws li cov qauv ntawm cov pa roj carbon atoms, lawv cov kev sib xyaw ua ke, kev sib xyaw ua ke thiab cov khoom siv hluav taws xob nplua nuj covalent. Sib tsoo log yog ua los ntawm ntau homabrasives, hom abrasives pab txiav txim siab qhov zoo tshaj plaws siv rau cov cuab yeej, thiab kev faib tawm ntawm abrasives suav nrog kev sib koom ua ke abrasives, coated abrasives, thiab nonwoven abrasives, uas siv cov nplaum los khi cov khoom rau cov duab sib tsoo. Superabrasive cov khoom, txawm nyob rau hauv daim ntawv ntawm cov cuab yeej kho los yog sib tsoo lub log, yog siv los tsim cov ntaub ntawv uas nyuaj heev los yog tsis yooj yim rau cov pa abrasives: iav bevels nyob rau hauv lub tsheb thiab kev tsim kho sectors, raws li zoo raws li high-precision sib tsoo.
Crystal thiab ceramic Cheebtsam, txiav silicon wafers, ncig saws thiab woodworking cov cuab yeej. Superabrasives yog siv rau precision sib tsoo hauv tsheb, kev tsim kho lossis siv lead ua iav thiab cov khoom siv ceramic; Machining cav thiab kis tau tus mob xws li cams thiab crankshafts, slicing silicon chips los yog sib tsoo ncig saws thiab woodworking cov cuab yeej. Alumina yog qhov zoo tshaj plaws abrasive nyob rau hauv ntau hom, thiab nws versatility ua rau nws cov feem ntau siv abrasive, dawb fused alumina yog softer los yog ilv tshaj li lwm yam abrasives.
Muaj ob homabrasives,ntuj abrasives thiab dag abrasives, tseem ceeb ntuj abrasives, xws li emery, corundum thiab pob zeb diamond, tsuas yog siv rau tshwj xeeb hom sib tsoo log thiab honing pob zeb. Tsim los yog hluavtaws abrasives tam sim no yog thawj qhov kev xaiv rau cov poj niam thiab tsuas yog siv tau zoo li ntuj abrasives. Kev lag luam abrasive feem ntau yog ua los ntawm tsib hom abrasives, thiab muaj peb cov tsoos abrasives, uas yog silicon carbide, alumina thiab garnet, thiab lwm yam yog pob zeb diamond thiab cubic boron nitride, sib sau ua ke hu ua super abrasives.
Minerals nrog Mohs hardness ntawm 6 los yog siab dua tuaj yeem suav hais tias yog qhov tshwm sim ntawm abrasives, ib txwm tshwm sim abrasives muaj xws li xuab zeb, garnet, emery, corundum, thiab pob zeb diamond, thiab cov abrasives muaj xws li alumina, silicon carbide, boron carbide, cubic boron nitride, thiab Hira. Super Abrasives tau tsim nyob rau hauv 1982 los tsim super xov thiab honing pob zeb rau kev lag luam hauv Indian. Superabrasives tuaj nyob rau hauv daim ntawv ntawm kev sib tsoo log thiab siv thaum cov khoom siv machined yog ib qho nyuaj heev los yog tsis yooj yim rau cov abrasives zoo tib yam, thiab muaj pob zeb diamonds yog ib qho ntawm cov khoom siv feem ntau siv los ua cov ntaub ntawv abrasive.
Pob zeb diamond thiab CBN sib tsoo log yog hu ua super sib tsoo log kom paub qhov txawv ntawm cov pa sib tsoo log xws li alumina thiab silicon carbide. Cov yam tseem ceeb uas ua rau kev loj hlob ntawm kev ua lag luam yog qhov nce hauv super abrasives hloov cov tsoos abrasives, qhov kev xav tau ntawm cov tshuab thiab cov cuab yeej nce ntxiv, kev nce hauv tsoomfwv cov thawj coj los txhawb kev tsim kho, kev nce hauv kev siv cov cuab yeej tsim khoom, thiab kev loj hlob. . Kev tsim khoom yog qhov tseem ceeb ua rau kev loj hlob ntawm kev lag luam super abrasive.
