Cov Khoom Tseem Ceeb Ntawm Abrasives Thiab Yuav Ua Li Cas
Cov khoom tseem ceeb ntawm abrasives thiab yuav ua li cas los tsim lawv yog cov ntaub ntawv tseem ceeb rau txhua yam khoom zoo. Ntau lub ntuj abrasives tau hloov los ntawm cov khoom siv dag zog. Ntxiv nrog rau pob zeb diamond, kev ua haujlwm ntawm ntuj abrasives tsis ruaj khov, tab sis nws tseem muaj nws cov nqi siv. Ib qho ntawm cov khoom tseem ceeb ntawm abrasive yog nws hardness, nws yuav tsum nyuaj tshaj li cov khoom yuav tsum tau ua, feem ntau siv Mohs hardness tester los txiav txim siab hardness ntawm ntau yam abrasives. Lwm qhov kev ua haujlwm tseem ceeb ntawm abrasives yog toughness lossis ntim lub zog. Cov cuab yeej no tuaj yeem tswj tau los ntawm kev hloov pauv qhov sib xyaw, purity, particle loj thiab siv lead ua qauv ntawm cov khoom siv raw kom haum rau ntau yam kev siv. Hauv kev tsim cov khoom siv abrasive, tag nrho cov ntaub ntawv raw, tshwj tsis yog hmoov talc thiab hlau oxide, yuav tsum tau crushed thiab tshuaj ntsuam. Muaj ob lub ntsiab ntawm abrasives: natural abrasives thiab artificial abrasives. Raws li qhov nyuaj ntawm kev faib tawm ntawm superhard abrasives thiab zoo tib yam abrasives ob pawg. Muaj ntau hom abrasives, los ntawm softer tsev detergents thiab lub pov haum abrasives mus rau cov ntaub ntawv hardest pob zeb diamond.Abrasives yog ib yam khoom tseem ceeb hauv kev tsim khoom ntawm txhua yam khoom precision. Ntau lub ntuj abrasives tau hloov los ntawm cov khoom siv dag zog. Ntxiv nrog rau pob zeb diamond, kev ua haujlwm ntawm ntuj abrasives tsis ruaj khov, tab sis nws tseem muaj nws cov nqi siv. Pob zeb diamond yog qhov nyuaj tshaj plaws abrasive, ua rau hauv South Africa, suav txog 95% ntawm lub ntiaj teb tag nrho cov khoom, tus so yog Brazil, Australia, Guyana thiab Venezuela thiab lwm qhov chaw. Muaj pob zeb diamond los ntawm grey dawb mus rau xim dub ntau, tom qab sib tsoo tuaj yeem ua lub log sib tsoo, siv lub tshuab polishing thiab sib tsoo hmoov.Cov tshuaj muaj pes tsawg leeg ntawm ntuj corundum yog alumina, lub hauv paus tseem ceeb yog South Africa, thiab nws yog siv los txhuam thiab zom. iav. Emery kuj yog ib daim ntawv ntawm alumina ntuj, feem ntau hais lus, nws tsis yog ntshiab li corundum, lub hauv paus ntsiab lus ntawm tim Nkij teb chaws, Qaib ntxhw, siv los ua emery ntaub los yog sandpaper. Garnet yog siv los tsim cov coated abrasives, uas feem ntau yog siv hauv kev lag luam ntoo thiab tawv. Flint feem ntau yog siv los ua cov ntawv xuab zeb. Quartz yog ib qho ntawm cov ntaub ntawv ntxov tshaj plaws siv rau kev sib tsoo log, thiab tseem siv los ua riam thiab ua haujlwm iav. Pumice pob zeb los ntawm volcanoes thiab yog siv los ua polishing hmoov. Diatomaceous ntiaj teb yog cov khoom xyaw rau polishing hmoov thiab roj pob zeb. Lwm yam ntuj abrasives yog talc, silica, feldspar, dub silica thiab chalk.Txij li xyoo 1970, ntau cov khoom siv dag zog tau tsim, ntawm cov tseem ceeb yog silicon carbide thiab alumina. Silicon carbide feem ntau hu ua carborundum, ntshiab silica xuab zeb thiab coke tov nrog me me ntawm cov ntoo chips, rau hauv lub cub hluav taws xob, ci ntawm 2,200 ~ 2,480 degree rau li 36 teev thiab tsim. Alumina feem ntau hu ua corundum, kev lag luam feem ntau siv hluav taws xob arc rauv cua sov kom yaj bauxite ua los ntawm, pob tshab dawb li kub-rhiab hlau abrasive, dub rau kev ua castings thiab hlau. Artificial pob zeb diamond sib tsoo log yog lub siab tshaj plaws hardness ntawm abrasives, tsim nyog rau kev sib tsoo ntawm carbide tej cuab yeej. Artificial pob zeb diamond kuj tuaj yeem ua rau ntau yam duab thiab qhov ntau thiab tsawg ntawm cov cuab yeej kom haum rau txiav iav thiab ceramics. Boron carbide nyuaj dua silicon carbide thiab tsis haum rau kev sib tsoo log. Nws tuaj yeem siv rau qhov chaw ntawm pob zeb diamond kim thaum polishing cov ntaub ntawv nyuaj. Cubic boron carbide yog ob zaug nyuaj li silicon carbide thiab 2.5 npaug ntawm qhov nyuaj li alumina, ua rau nws siv tau zoo hauv kev sib tsoo qee cov cuab yeej steels.Ib qho ntawm cov khoom tseem ceeb ntawm abrasive yog nws cov hardness, nws yuav tsum nyuaj dua li cov khoom yuav tsum tau ua, feem ntau. siv Mohs hardness tester los txiav txim siab hardness ntawm ntau yam abrasives. Lwm qhov kev ua haujlwm tseem ceeb ntawm abrasives yog toughness lossis ntim lub zog. Cov cuab yeej no tuaj yeem tswj tau los ntawm kev hloov pauv qhov sib xyaw, purity, qhov loj me thiab siv lead ua qauv ntawm cov khoom siv raw kom haum rau ntau yam kev siv.Rau cov khoom siv abrasive, tag nrho cov khoom siv raw, tshwj tsis yog hmoov talc thiab hlau oxide, yuav tsum tau ua. crushed thiab tshuaj ntsuam, thiab qhov kev tshuaj ntsuam loj yuav tsum yog 4 mus rau 900, uas yog, txoj kab uas hla ntawm 6 hli (mm) mus rau 6 microns (ib txhiab ntawm 1 hli) los yog finer. Sib tsoo log yog cov khoom tseem ceeb abrasive, los ntawm ib qho kev faib ua feem ntawm abrasive thiab binder tov, sintered tom qab tuag txoj kev, tom qab kuj yuav tsum tau zoo li tus, sib npaug thiab overspeed xeem. Emery daim ntaub thiab cov ntawv xuab zeb yog lwm yam khoom siv abrasive nrog cov zis loj, uas tau sib koom ua ke los ntawm cov khoom siv abrasive ntawm cov khoom siv hauv paus (daim ntaub lossis ntawv) thiab txiav rau hauv cov khoom sib txawv tom qab ziab. Lwm cov hmoov los yog granular abrasive, tom qab kev tshuaj ntsuam xyuas, yuav tsum tau ua raws li cov txheej txheem, xws li kev sib tsoo los yog polishing abrasives, feem ntau nrog cov ntxhia roj pleev lossis siv quav ciab thiab lwm yam khoom siv, kom tau raws li qhov xav tau ntawm kev ua haujlwm sib txawv.Abrasives tau siv dav hauv kev lag luam, tshwj xeeb tshaj yog thaum ua cov high-precision los yog tsawg-roughness qhov chaw los yog tshwj xeeb tshaj yog nyuaj qhov chaw, abrasives thiab abrasives yog qhov tseem ceeb. Tsis tas li ntawd, rau kev sib tsoo riam thiab txiav cov ntaub ntawv nyuaj, kev sib tsoo log kuj yog ib qho cuab yeej tseem ceeb. Hauv kev lag luam tsheb tsim, lub nplhaib piston thiab lub tog raj kheej, lub valve thiab lub rooj zaum ntawm qhov sib tw ze, kev sib kis thiab iav raug, thiab lwm yam, yuav tsum tau ua tiav nrog cov abrasives thiab abrasives los xyuas kom meej. Lwm yam khoom tshiab uas muaj feem xyuam nrog, xws li cov yas sib txuas rau cov menyuam zeb nrog qhov nruab nrab, rau ntau qhov chaw deburring txuag lub sij hawm, txhim kho productivity.The ntau lawm technology ntawm abrasives tau advanced ho. Kev ua haujlwm ntawm pob zeb diamond sib tsoo log yog plaub zaug siab dua li ntawm 14 xyoo dhau los; Tag nrho cov nqi ntawm zirconia-alumina sib tsoo log siv nyob rau hauv dov mills tsuas yog 25% ntawm qhov nws yog nyob rau hauv 1948, thiab qhov ceev yog xya zaus dua. Qhov teeb meem tam sim no yog qhov kev xav ntawm kev sib tsoo yooj yim tsis meej thiab yuav tsum tau kawm; Cov specifications ntawm cov khoom yog complex, ntau yam yog dav, thiab nws tsis yooj yim rau kev yooj yim.