Qhia txog Kev Tiv Thaiv Kev Hnav Zoo Tshaj Plaws ntawm Dawb Fused Alumina
I. Nyuaj Los Ntawm Qhov Tseeb: Keeb Kwm Qhia Txog Ib Nrab Ntawm Zaj Dab Neeg
Raws li cov lus hais, zoo li txiv, zoo li tub.Dawb fused aluminaQhov kev tawv tawv uas muaj nyob hauv nws lub cev yog los ntawm nws keeb kwm. Nws lub npe tiag tiag yog alumina dawb, nrog rau cov mis tshuaj α-Al₂O₃. Saib nws cov qauv crystalline - nws muaj lub cev ua los ntawm cov khoom tawv tiag tiag.
Yuav ua li cas thiaj ua tau? Cov txheej txheem zoo li alchemy. Qib siabalumina hmoovraug rau qhov kub tshaj 2000 degrees Celsius hauv lub cub hluav taws xob arc - qhov tseeb yog qhov xwm txheej ntawm 'tempering hlau los ntawm kev rov ua dua.' Thaum lub sijhawm ua kom zoo no, cov khoom tsis huv raug tshem tawm ntau tshaj plaws, ua rau nws dawb huv thiab huv tshaj 99%.
Xav txog nws cov qauv siv lead ua: qhov ntom ntom thiab sib xws, tsis muaj qhov tsis zoo xws li npuas lossis tawg. Nws zoo ib yam li kev sib piv cov granite zoo tshaj plaws nrog cov thee honeycombed - uas ua pov thawj ntau dua hnav-resistant? Cov lus teb yog tus kheej pom tseeb. Cov qauv crystalline siab-purity, high-density no tsim lub hauv paus ntawm tag nrho nws cov khoom tshwj xeeb, tsim nws qhov kev tiv thaiv tseem ceeb tshaj plaws thiab tseem ceeb tshaj plaws tiv thaiv kev puas tsuaj.
II. Kev Nyuaj Siab: Tsuas yog Qhov Nto
Thaum tham txog kev tiv taus kev hnav, qhov nyuaj feem ntau tshwm sim los rau hauv siab. Tseeb tiag,dawb fused aluminaNws muaj qhov nyuaj ntawm Mohs ntawm 9.0 - tsuas yog pob zeb diamond thiab silicon carbide thiaj li dhau los ua qhov nyuaj tshaj plaws. Hauv peb txoj kev lag luam, tsuas yog muaj ob peb yam "dab phem", nws tuaj yeem "taug kev siab". Kev sib tsoo hlau lossis cov hlau sib xyaw nrog nws zoo li txiav cov butter nrog rab riam ntse - tsis muaj zog thiab txaus siab.
Txawm li cas los xij, kuv yuav tsum hais ntxiv tias: qhov tawv ib leeg tsis tuaj yeem ua kom cov khoom siv muaj qhov tseem ceeb hauv kev hnav tsis kam. Qee cov ntaub ntawv muaj qhov tawv heev tab sis tawg thaum siv, ua rau lawv pov tseg - lawv muaj txiaj ntsig zoo li cas? Dawb fused alumina lub peev xwm tiag tiag yog nyob rau hauv nws qhov zoo hauv qab: kev tawv.
Nws zoo ib yam li rab ntaj zoo: tsis yog nws yuav tsum ntse xwb (qhov tawv), tab sis nws kuj yuav tsum muaj qhov ywj pheej, ntaus tsis tawg lossis tawg (qhov tawv). Alumina dawb fused ua ke qhov tawv tshwj xeeb nrog qhov tawv zoo kawg nkaus. Thaum lub sijhawm crystallisation, nws cov qauv sab hauv sib txuas ua ke zoo heev, ua rau nws nqus thiab faib cov zog sab nraud.
Qhov no txhais li cas rau kev siv tiag tiag? Thaum raug kev cuam tshuam loj heev lossis kev nias, nws tsis tawg tam sim ntawd hauv txoj kev 'tawg es tsis yog khoov'. Hloov chaw, nws tuaj yeem tiv taus lub zog, nqus nws los ntawm kev hloov pauv me me kom tswj tau qhov ruaj khov tag nrho. Tus cwj pwm no ua rau nws tsis yog tsuas yog tsim rau kev sib tsoo meej xwb tab sis kuj rau kev sib tsoo hnyav thiab kev siv cuam tshuam siab. Piv txwv li, ua cov khoom siv abrasive hauv cov tshuab xuab zeb, nws ua pov thawj tias ruaj khov heev.
III. Kev Tiv Thaiv Kub Siab: Nws Lub Zog Zais Cia
Qhov no feem ntau raug saib tsis taus tab sis tseem ceeb heev. Dawb fused alumina qhia txog qhov refractoriness tshaj 1800 ° C, nrog rau qhov poob zog tsawg kawg nkaus ntawm qhov kub siab.
Xav txog qhov xwm txheej no: Thaum lub sijhawm sib tsoo ceev ceev, kev sib txhuam ntawm cov khoom sib tsoo thiab cov khoom ua haujlwm tsim cov cua sov loj, ua rau qhov kub hauv zos nce sai. Yog tias cov khoom sib tsoo nws tus kheej tsis tiv taus cua sov, nws yuav mos, lwj, lossis ua rau muaj kev cuam tshuam tshuaj lom neeg ntawm lub sijhawm no, ua rau kev sib tsoo tsis zoo thiab lub cuab yeej ua haujlwm tsis zoo sai.
Txawm li cas los xij, alumina dawb fused tseem tsis tau hloov pauv. Thaum kub siab, nws tseem tuav nws qhov nyuaj thiab lub zog, sawv ruaj khov thiab tsis txav. Cov yam ntxwv no ua rau nws yog lub hauv paus tseem ceeb rau kev tsim cov khoom siv abrasives zoo li cov log sib tsoo, cov discs txiav, thiab cov khoom siv abrasives coated (xuab zeb thiab daim ntaub emery). Nws yog qhov tseem ceeb rau kev siv cov hlau alloy siab thiab cov hlau cuab yeej.
IV. Kev Sib Cais Tshuaj: Qhov Zais Cia Rau Kev Tiv Thaiv Kev Hnav Mus Ntev
Alumina dawb fused muaj cov tshuaj lom neeg ruaj khov zoo kawg li, ua rau muaj lub siab xav "tsis muaj kev sib cais hluas". Nws tsis yooj yim cuam tshuam nrog cov tshuaj xws li kua qaub lossis alkalis.
Hauv qee qhov xwm txheej ua haujlwm, kev hnav tsis yog tsuas yog kev puas tsuaj ntawm lub cev xwb tab sis kuj cuam tshuam nrog kev xeb los ntawm tshuaj lom neeg. Piv txwv li, hauv cov chaw muaj tshuaj lom neeg, cov ntaub ntawv ntsib ob qho tib si kev puas tsuaj ntawm cov khoom siv thiab kev xeb nruab nrab. Yog tias cov ntaub ntawv tsis muaj kev tiv thaiv kev xeb, nws qhov chaw ua ntej tsim cov qhov vim yog kev xeb, uas tom qab ntawd raug hnav tawm, ua rau cov nqi hnav nce ntxiv exponentially.
Alumina dawb fused zam qhov teeb meem no. Nws cov tshuaj inertness ua rau nws tiv taus kev yaig los ntawm ntau yam tshuaj lom neeg, tswj kom du thiab tiaj tus rau lub sijhawm ntev. Ntsib nrog tsuas yog ib qho ntawm nws ob qho yeeb ncuab tseem ceeb - kev puas tsuaj lub cev lossis kev xeb tshuaj - nws ntuj tshaj cov neeg sib tw.
V. Muab Cov Cuab Yeej Zoo Rau Txoj Haujlwm Zoo: Peb Yuav Tsum Siv Nws Li Cas?
Tom qab nkag siab txog nws cov yam ntxwv tshwj xeeb, peb yuav ua li cas thiaj siv tau 'cuab yeej zoo' no hauv kev tsim khoom siv tau zoo?
Kev Kos Duab ntawm Kev Sib Txuas: Alumina dawb fused yog cov khoom siv abrasive. Yuav kom hloov nws mus ua cov cuab yeej zoo li cov log sib tsoo lossis ntawv xuab zeb, yuav tsum muaj tus neeg sawv cev sib txuas (xws li cov ceramic lossis resin bonds). Cov yam ntxwv ntawm tus neeg sawv cev sib txuas no ncaj qha txiav txim siab lub zog ntawm cov cuab yeej abrasive, kev tiv taus cua sov, thiab kev muaj peev xwm ntse (lub peev xwm rau cov noob uas tsis muaj zog kom poob sai, qhia cov noob tshiab, ntse). Cov cuab yeej abrasive zoo tshaj plaws yog kev sib koom ua ke zoo meej ntawm alumina dawb fused zoo thiab tus neeg sawv cev zoo heev. Yog li ntawd, thaum xaiv cov log sib tsoo, ib tug yuav tsum xav txog tsis yog tsuas yog cov abrasive tab sis kuj tseem seb tus neeg sawv cev sib txuas puas sib haum nrog koj cov kev xav tau machining.
Xam tus nqi ntawm kev lag luam: Alumina dawb fused muaj tus nqi siab dua. Yog li ntawd, rau cov ntawv thov uas tsis muaj kev xav tau ntau - xws li kev sib tsoo cov hlau carbon ib txwm - alumina xim av fused yuav ua pov thawj tias pheej yig dua. Txawm li cas los xij, thaum ntsib qhov kev thov siab-hardness, siab-precision, lossis kub-hloov pauv hnav-xws li kev sib tsoo cov hlau ceev ceev, cov hlau cuab yeej, lossis kev tsim cov khoom siv refractories siab heev - qhov kev nqis peev ntxiv rau hauv alumina dawb fused yuav tsis muaj qhov tsis ntseeg tau rov qab los ntawm nws lub neej ua haujlwm ntev heev thiab kev ua haujlwm zoo tas li. Qhov kev xam no xav tau kev pom mus sij hawm ntev.
Hauv kev xaus, qhov kev tiv thaiv hnav ntawm alumina dawb tsis yog ib qho tshwj xeeb xwb; nws muaj peev xwm sib ntaus sib tua tau zoo heev. Nws kav zoo tshaj plaws ua "tus yeej txhua yam" hauv qhov nyuaj, tawv, thermal stability, thiab tshuaj lom neeg tsis kam. Zoo li tus kws ua haujlwm txawj ntse hauv peb lub hoobkas - ntsiag to tab sis muaj kev txawj ntse tshwj xeeb, ib txwm ntseeg tau thaum nws tseem ceeb tshaj plaws. Nkag siab txog nws qhov xwm txheej, hwm nws cov yam ntxwv, thiab siv nws qhov twg nws ua tau zoo tshaj plaws, thiab nws yuav muab tus nqi siab tshaj plaws. Lub sijhawm tom ntej koj siv "pob zeb dawb" no, koj yuav txaus siab rau nws qhov kev zoo nkauj ntxiv.