Abrasives tuaj yeem muab faib ua ob pawg: abrasives zoo tib yam (xws li txhuas oxide, silicon carbide, thiab lwm yam) thiab superhard abrasives (pob zeb diamond, cubic boron nitride, thiab lwm yam).
CBN thiab Jinzeshi yog ib qho nyuaj thiab hnav-tiv taus dua li cov abrasives zoo tib yam, tab sis lawv kim heev.Nyob rau tib lub sijhawm, superhard abrasives yog cov khoom siv hluav taws xob zoo heev (cov thermal conductivity ntawm pob zeb diamond yog 6 npaug ntawm tooj liab), thaum cov abrasives zoo tib yam yog cov khoom siv ceramic, yog li lawv yog adiabatic.
Superhard abrasive kuj muaj cov thermal diffusivity siab, uas yog, nws muaj peev xwm dissipate tshav kub sai.Cov yam ntxwv no ua rau superhard abrasive muaj qhov "txias txiav".Lub abrasion tsis kam ntawm superhard abrasives kuj zoo dua li ntawm cov abrasives zoo tib yam, tab sis cov yam ntxwv ntawm superhard abrasives tsis tau txhais hais tias lawv tsim nyog rau txhua tus.cov txheej txheem sib tsoo.
Txhua abrasive muaj nws daim ntawv thov tsim nyog tshaj plaws, yog li nws yog ib qho tseem ceeb kom nkag siab cov yam ntxwv ntawm txhua qhov abrasive.Piv txwv li, alumina ceramic abrasives - qee zaum hu ua noob gel (SG) abrasives lossis ceramic abrasives - feem ntau muaj kev hnav zoo dua thiab zoo li qub dua li cov molten (zoo tib yam) alumina.Txawm li cas los xij, ceramic abrasives kuj muaj cov ntawv thov tsim nyog tshaj plaws.
Alumina: Al2O3 yog qhov pheej yig tshaj abrasive.Thaum sib tsoo hardened steel, kev ua tau zoo heev.Nyob rau hauv cov xwm txheej ntawm kev hnav khaub ncaws tsis tu ncua, npib tsib xee puag superalloys tuaj yeem ua hauv av.Al2O3 muaj qhov hloov tau zoo rau ntau yamsib tsootej yam kev mob, xws li cov ntaub ntawv mos thiab tawv, lub teeb txiav thiab hnyav txiav, thiab tuaj yeem zom qhov chaw siab heev.
Ceramic alumina: ceramic alumina muaj lub zog siab, yog li nws yog qhov tsim nyog tshaj plaws rau lub sijhawm uas txiav quab yuam ntawm txhua cov nplej abrasive siab.Ceramic alumina yog qhov zoo heev hauv kev sib tsoo cylindrical thiab dav hlau loj reciprocating sib tsoo ntawm cov hlau tawv tawv.Tab sis nws tsis haum rau qhov ntev txiav arc thiab me me load quab yuam ntawm ib qho abrasive grain, xws li kev sib tsoo sab hauv, creep pub sib tsoo, thiab lwm yam. Txawm li cas los xij, ceramic alumina abrasive hais tau hloov kho los ntawm "stretching" kuj tuaj yeem siv los ua cov kua nplaum.stainless hlau, superalloy, thiab lwm yam txawm tias thaum txiav arc ntev.Lub sijhawm no, qhov sib piv (ntev dav piv) ntawm cov khoom abrasive ncav cuag 5.
Post lub sij hawm: Jan-02-2023