1. Hom hommetallographic txiav logs
Metallographic txiav log tuaj yeem hu ua metallographic txiav discs, uas yog siv rau kev txiav cov qauv hauv metallographic qauv txheej txheem. Feem ntau metallographic txiav log ntawm kev ua lag luam yog:
⑴ Pob zeb diamond txiav log: Nws yog tsim los ntawm kev sib xyaw cov pob zeb diamond thiab cov hmoov hlau. Nws muaj qhov zoo ntawm hardness siab, hnav tsis kam thiab ua haujlwm ntev. Nws yog tsim rau txiav cov ntaub ntawv nyuaj thiab cov ntaub ntawv nkig xws li pob zeb, ceramics thiab iav.
⑵ Silicon carbide txiav log: Nws yog tsim los ntawm high-temperature sintering ntawm silicon carbide thiab lwm yam additives. Nws muaj hardness siab thiab haum rau txiav cov ntaub ntawv nyuaj xws li hlau, iav thiab ceramics. Silicon carbide txiav disc muaj qhov kub thiab txias thiab tuaj yeem ua tau raws li qhov xav tau ntawm kev txiav ntawm qhov kub thiab txias.
⑶ Corundum txiav log: Nws yog tsim los ntawm kev sib xyaw alumina hais thiab lwm yam khoom ntxiv. Nws muaj siab hardness, zoo heev hnav tsis kam thiab tus nqi qis. Nws yog tsim rau kev txiav cov ntaub ntawv xws li hlau thiab lub teeb alloys.
2. Ua tib zoo mloog cov ntsiab lus tseem ceeb ntawm kev xaiv metallographic txiav log
Kev xaiv ntawm metallographic txiav log muaj cov kev cai sib txawv rau cov ntawv thov sib txawv. Thaum xaiv ib tug txiav disc, thawj qhov yuav tsum tau xav txog yog nws lub peev xwm txiav. Thaum xaiv ib tug txiav disc, koj yuav tsum xyuam xim rau cov ntsiab lus tseem ceeb hauv qab no:
⑴ Qhov loj thiab qhov ntev ntawm metallographic txiav log.
Qhov ntev ntawm metallographic txiav log feem ntau muaj peb yam: txoj kab uas hla, aperture, thiab thickness. Metallographic txiav log feem ntau yog siv nrog metallographic txiav tshuab, thiab txoj kab uas hla thiab aperture ntawm txiav discs yuav tsum tau txiav txim raws li cov specifications ntawm lub tshuab txiav. Nyob rau hauv cov nqe lus ntawm thickness, feem ntau hais lus, ib tug thinner thickness tsim pab kom zoo dua tswj cov yas deformation ntawm cov khoom qauv tshwm sim los ntawm tej kev nyuaj siab thaum txiav, thiab kuj zoo dua tswj qhov raug ntawm txoj hauj lwm txiav. Rau cov neeg uas xav tau kev txiav txim siab siab, sim xaiv cov txiav txiav nyias nyias. Txawm li cas los xij, thaum lub txiav txiav nyias nyias, cov txiav txiav tuaj yeem tawg lossis deform, yog li nws yuav tsum tau xaiv cov txiav txiav uas tsim nyog raws li cov qauv thiab lub tshuab txiav.
⑵ Lub hardness ntawm cov khoom txiav.
Cov ntaub ntawv yog los ntawm mos mus rau ib tug hardness: yas, roj hmab, non-ferrous hlau, cam khwb cia hlau, stainless hlau, cuab yeej steel, hardened steel, caij nplooj ntoos hlav steel, bearing steel, alloy steel, tshav kub-kho hlau, sintered cov ntaub ntawv, ceramics, silicon wafers, quartz, cement.
Ntxiv nrog rau pob zeb diamond txiav log, silicon carbide txiav discs thiab corundum txiav discs yog tag nrho cov khoom siv txiav discs, uas tau muab faib ua mos thiab tawv, thiab kuj muaj lub neej sib txawv. Feem ntau hais lus, lub neej ntawm kev txiav disc nrog qis hardness (mos) yuav luv dua, thiab lub neej ntawm cov txiav disc nrog siab hardness (nyuaj) yuav ntev dua. Mos txiav log yog xav tau rau cov ntaub ntawv uas muaj siab hardness.
⑶ Txiav nyhuv.
Cov nyhuv txiav feem ntau suav nrog kev txiav nrawm, txiav nto tiav thiab txiav cov seem seem. Nws yog ib qho tsim nyog los xaiv lub log tsim nyog raws li qhov xav tau ntawm cov khoom sib txawv.
High-zoo txiav log yuav ua rau cov txheej txheem txiav zoo li lub teeb, txiav nto yog uniform thiab tiaj tus, thiab tib lub sij hawm, lub saw hniav lub neej ntev dua. Txhawm rau sib npaug ntawm qhov kev sib raug zoo ntawm peb qhov no, nws yog ib qho tsim nyog yuav tau xaiv qhov zoo tshaj plaws txiav disc raws li cov kev xav tau zoo xws li cov qauv duab, hardness, thiab kev ua haujlwm ntawm lub tshuab txiav.