Hauv cov khoom lag luam, cov hlau iav siv dav hauv cov tshuab xa hluav taws xob ntawm ntau yam khoom siv kho tshuab vim nws lub zog siab, hnav tsis kam thiab qaug zog tsis kam. Nws qhov zoo cuam tshuam ncaj qha rau qhov zoo thiab lub neej ntawm cov khoom siv. Yog li ntawd, kev tswj hwm qhov zoo ntawm cov hlau iav yog qhov tseem ceeb heev. Thaum xaiv, nws lub zog, tawv thiab hnav tsis kam yuav tsum tau xav txog. Ua ntej ua cov hlau iav, peb yuav tsum tshuaj xyuas cov qauv metallographic, qhov nyuaj, cov tshuaj lom neeg sib xyaw, thiab lwm yam ntawm cov khoom siv. Cov qauv metallographic thiab qhov nyuaj ntawm cov hlau iav yog cov cim tseem ceeb rau kev ntsuam xyuas nws cov khoom siv kho tshuab, cov teebmeem kho cua sov thiab lub neej ua haujlwm. Kev tshuaj xyuas metallographic thiab kev xeem qhov nyuaj ntawm cov hlau iav yuav tsum ua raws li cov txheej txheem tus qauv, thiab tsim cov phiaj xwm xeem raws li cov yam ntxwv ntawm cov khoom siv thiab cov xwm txheej ua haujlwm:
Ua ntej, kev tshuaj xyuas metallographic. Cov qauv metallographic ntawm cov hlau iav muaj feem cuam tshuam loj rau nws qhov kev ua tau zoo, xws li qhov tob ntawm cov txheej carburized, qhov loj ntawm cov noob, kev faib tawm carbide, thiab lwm yam. Nws yog qhov tsim nyog los txiav txim siab cov kauj ruam tshuaj xyuas, xws li kev kuaj, kev npaj cov qauv, kev xeb, thiab tom qab ntawd saib cov qauv. Nws kuj tseem yuav tsum tau hais txog cov hom ntaub so ntswg, xws li martensite, bainite, pearlite, thiab yuav ua li cas los ntsuas seb cov ntaub so ntswg no puas ua tau raws li cov qauv.
Tom qab ntawd los txog qhov kev sim qhov nyuaj. Qhov nyuaj ntawm cov hlau iav yog ncaj qha cuam tshuam nrog kev hnav tsis kam thiab lub zog. Cov txheej txheem sim qhov nyuaj feem ntau suav nrog Rockwell hardness, Brinell hardness, Vickers hardness, thiab tej zaum qhov nyuaj ntawm qhov chaw Rockwell rau cov txheej carburized. Nws yog qhov tsim nyog los piav qhia txog cov xwm txheej siv tau ntawm ntau txoj kev sim, xws li Vickers lossis qhov chaw Rockwell rau cov txheej carburized, thiab Brinell lossis Rockwell rau qhov nyuaj tag nrho. Tib lub sijhawm, cov qauv xeem, xws li ASTM lossis GB, thiab cov kev ceev faj thaum lub sijhawm xeem, xws li kev xaiv cov ntsiab lus xeem, kev kho qhov chaw, thiab lwm yam, yuav tsum tau hais txog.
Ua ntej kev tshuaj xyuas, peb yuav tsum txiav thiab kuaj cov hlau iav ua ntej. Hauv qab no peb siv lub tshuab txiav cov qauv metallographic ua piv txwv los qhia txog cov txheej txheem txiav cov qauv.
1. Tshem tawm cov workpiece thiab clamp nws nrog ib tug ceev clamp.
2. Tom qab clamping lub workpiece, muab lub hau tiv thaiv rau ntawm.
3. Teem cov kev txiav ntawm qhov screen thiab pib qhov kev pab cuam txiav
4. Qhib lub hau sab saud thiab rho tawm cov qauv txiav kom ua tiav cov txheej txheem txiav cov qauv.
Cov qauv txiav tuaj yeem siv rau cov txheej txheem npaj qauv tom ntej xws li kev teeb tsa, kev sib tsoo, thiab kev txhuam, tom qab ntawd qhov kev sim qhov nyuaj ntawm cov iav lossis kev tshuaj xyuas metallographic tuaj yeem ua tiav.
Lub sijhawm tshaj tawm: Plaub Hlis-02-2025
