Superhard tool material yog hais txog cov khoom siv superhard uas tuaj yeem siv los ua cov cuab yeej txiav. Tam sim no, nws tuaj yeem muab faib ua ob pawg: cov khoom siv pob zeb diamond txiav thiab cubic boron nitride txiav cov cuab yeej. Muaj tsib yam tseem ceeb ntawm cov ntaub ntawv tshiab uas tau siv los yog raug kuaj
(1) Ntuj thiab hluavtaws hluavtaws loj ib lub pob zeb diamond
(2) Poly pob zeb diamond (PCD) thiab poly pob zeb diamond composite hniav (PDC)
(3) CVD pob zeb diamond
(4) Polycrystal cubic boron ammonia; (PCBN)
(5) CVD cubic boron ammonia txheej
1, ntuj thiab hluavtaws loj ib lub pob zeb diamond
Ntuj pob zeb diamond yog cov qauv siv lead ua tsis sib xws uas tsis muaj ciam teb sab hauv, yog li cov cuab yeej ntug tuaj yeem ncav cuag lub atomic smoothness thiab sharpness, nrog muaj zog txiav peev xwm, siab precision thiab me me txiav quab yuam. Lub hardness, hnav tsis kam thiab corrosion kuj thiab tshuaj stability ntawm tej yam ntuj tso pob zeb diamond kom lub neej ntev ntawm lub cuab tam, tuaj yeem ua kom ntev ib txwm txiav, thiab txo qhov cuam tshuam ntawm cov cuab yeej hnav ntawm qhov tseeb ntawm cov txheej txheem ua tiav, nws cov thermal conductivity tuaj yeem txo qhov kub thiab thermal deformation ntawm cov khoom. Cov yam ntxwv zoo ntawm lub ntuj loj loj ib lub pob zeb diamond tuaj yeem ua tau raws li feem ntau ntawm cov kev xav tau ntawm precision thiab ultra-precision txiav rau cov khoom siv. Txawm hais tias nws tus nqi kim, nws tseem lees paub tias yog qhov zoo tshaj plaws precision thiab ultra precision cuab yeej cov ntaub ntawv, tuaj yeem siv dav hauv kev ua cov tshuab hluav taws xob nuclear thiab lwm yam thev naus laus zis hauv daim iav, missiles thiab foob pob ua ntxaij, lub computer hard disk substrate, accelerator electron phom super precision machining, thiab tsoos saib qhov chaw, hniav nyiaj hniav kub, cwjmem, pob hlau kho kom zoo nkauj precision ua, thiab lwm yam. ultra-thin biological hniav thiab lwm yam cuab yeej kho mob. Kev txhim kho tam sim no ntawm kev kub siab thiab kev siv tshuab siab siab ua rau nws tuaj yeem npaj ib lub pob zeb diamond loj loj nrog qee qhov loj. Qhov kom zoo dua ntawm cov khoom siv pob zeb diamond no yog nws qhov loj me, zoo thiab kev ua tau zoo ntawm kev sib xws, uas tsis ua tiav hauv cov khoom siv pob zeb diamond. Vim qhov tsis txaus ntawm cov pob zeb diamond loj loj, tus nqi kim, cov khoom siv hluav taws xob loj ib qho siv lead ua pob zeb diamond cov khoom siv hauv ultra-precision txiav ua raws li lub ntuj loj loj siv lead ua pob zeb diamond hloov, nws daim ntawv thov yuav tsim sai heev.
2, polycrystal pob zeb diamond (PCD) thiab polycrystal pob zeb diamond composite hniav (PDC) piv nrog ib tug loj siv lead ua pob zeb diamond raws li cov khoom siv ntawm polycrystal pob zeb (PCD) thiab polycrystal pob zeb diamond composite hniav (PDC) muaj cov nram qab no zoo: (1) grain disordered kev npaj, isotropic, tsis muaj cleavage nto. Yog li ntawd, nws tsis zoo li lub pob zeb diamond loj loj ntawm qhov sib txawv siv lead ua lub zog, hardness
Thiab qhov hnav tsis kam yog qhov sib txawv heev, thiab vim tias qhov muaj nyob ntawm qhov cleavage nto thiab yog nkig.
(2) muaj lub zog siab, tshwj xeeb tshaj yog cov khoom siv PDC vim kev txhawb nqa ntawm carbide matrix thiab muaj kev cuam tshuam zoo, qhov cuam tshuam tsuas yog tsim cov nplej me me tawg, tsis zoo li ib lub pob zeb diamond loj tawg, yog li nrog PCD lossis PDC cov cuab yeej tsis tsuas yog siv tau rau precision txiav thiab zoo tib yam ib nrab precision machining. Tab sis kuj tuaj yeem siv tau los ua ntau qhov kev ntxhib los mos thiab kev ua haujlwm tsis sib xws (xws li milling, thiab lwm yam), uas nthuav dav siv ntau yam ntawm cov khoom siv pob zeb diamond.
(3) Cov cuab yeej loj PDC tuaj yeem npaj tau raws li qhov xav tau ntawm cov cuab yeej siv loj xws li milling cutter.
(4) Cov duab tshwj xeeb tuaj yeem ua kom tau raws li qhov xav tau ntawm kev ua haujlwm sib txawv. Vim yog kev txhim kho ntawm PDC cov cuab yeej billet thiab kev siv tshuab xws li hluav taws xob hluav taws xob, laser txiav tshuab, daim duab peb sab, herringbone, gables thiab lwm yam tshwj xeeb-zoo li tus hniav billet tuaj yeem ua tiav thiab tsim. Txhawm rau kom ua tau raws li qhov xav tau ntawm cov cuab yeej tshwj xeeb txiav, nws tuaj yeem tsim los ua qhwv, qhaub cij thiab yob PDC cuab yeej billet.
(5) Kev ua tau zoo ntawm cov khoom tuaj yeem tsim lossis kwv yees, thiab cov khoom tau muab cov yam ntxwv tsim nyog los hloov kho rau nws cov kev siv tshwj xeeb. Piv txwv li, xaiv cov khoom siv PDC zoo tuaj yeem txhim kho qhov zoo ntawm cov cuab yeej; Coarse-grained PDC cov khoom siv tuaj yeem txhim kho lub zog ntawm lub cuab yeej.
Hauv kev xaus, nrog kev txhim kho ntawm PCD thiab PDC cov cuab yeej siv, daim ntawv thov ntawm PCD thiab PDC cov cuab yeej tau nthuav dav mus rau ntau qhov kev tsim khoom.
Kev lag luam yog dav siv nyob rau hauv non-ferrous hlau (aluminium, aluminium alloy, tooj liab, tooj liab alloy, magnesium alloy, zinc alloy, thiab lwm yam), carbide, ceramics, non-metallic cov ntaub ntawv (yas, tawv roj hmab, carbon rods, ntoo, cement khoom, thiab lwm yam), composite cov ntaub ntawv (xws li fiber reinforced yas CFRP, hlau matrix composite kev lag luam, MMCs) kev ua tau zoo tshaj lwm cov tshuaj carbide.
Post lub sij hawm: Mar-27-2025
