Hauv cov khoom lag luam, iav hlau yog dav siv hauv lub zog xa hluav taws xob ntawm ntau yam khoom siv kho tshuab vim nws lub zog siab, hnav tsis kam thiab qaug zog. Nws qhov zoo ncaj qha cuam tshuam rau qhov zoo thiab lub neej ntawm cov khoom siv. Yog li ntawd, kev tswj kom zoo ntawm iav steel yog qhov tseem ceeb heev. Thaum xaiv, nws lub zog, toughness thiab hnav tsis kam yuav tsum tau xav txog. Ua ntej ua cov iav hlau, peb yuav tsum txheeb xyuas cov qauv metallographic, hardness, tshuaj muaj pes tsawg leeg, thiab lwm yam ntawm cov khoom. Cov qauv metallographic thiab hardness ntawm iav steel yog cov cim tseem ceeb rau kev ntsuas nws cov khoom siv kho tshuab, cov teebmeem kev kho cua sov thiab kev pabcuam lub neej. Kev ntsuam xyuas metallographic thiab hardness test ntawm iav steel yuav tsum nruj me ntsis raws li tus txheej txheem, thiab tsim ib qho kev sim raws li cov khoom siv thiab cov kev ua haujlwm:
Ua ntej, metallographic tsom xam. Lub metallographic qauv ntawm iav hlau muaj kev cuam tshuam zoo rau nws qhov kev ua tau zoo, xws li qhov tob ntawm txheej carburized, grain loj, carbide tis, thiab lwm yam. Nws yog ib qho tsim nyog los txiav txim siab cov kauj ruam ntawm kev soj ntsuam, xws li cov qauv, qauv kev npaj, corrosion, thiab tom qab ntawd soj ntsuam cov qauv. Nws kuj tseem yuav tsim nyog los hais txog cov ntaub so ntswg ntau, xws li martensite, bainite, pearlite, thiab yuav ntsuas seb cov ntaub so ntswg puas ua tau raws li cov qauv.
Tom qab ntawd los ntawm kev sim hardness. Lub hardness ntawm iav steel yog ncaj qha cuam tshuam rau hnav tsis kam thiab lub zog. Cov kev sim hardness feem ntau suav nrog Rockwell hardness, Brinell hardness, Vickers hardness, thiab tejzaum nws nto Rockwell hardness rau carburized txheej. Nws yog ib qho tsim nyog los piav qhia txog cov xwm txheej siv tau ntawm cov kev sim sib txawv, xws li Vickers lossis nto Rockwell rau cov txheej txheem carburized, thiab Brinell lossis Rockwell rau tag nrho cov hardness. Nyob rau tib lub sijhawm, cov qauv kev xeem, xws li ASTM lossis GB, thiab cov kev ceev faj thaum kuaj, xws li xaiv cov ntsiab lus xeem, kev kho saum npoo, thiab lwm yam, yuav tsum tau hais.
Ua ntej kev txheeb xyuas, peb thawj zaug yuav tsum tau txiav thiab coj mus kuaj cov iav hlau. Hauv qab no peb siv cov precision metallographic qauv txiav tshuab ua piv txwv los ua qauv txiav cov txheej txheem.
1. Tshem tawm lub workpiece thiab clamp nws nrog ceev ceev.
2. Tom qab clamping lub workpiece, muab tso rau ntawm lub hau tiv thaiv.
3. Teem cov kev txiav ntawm qhov screen thiab pib qhov kev pab cuam txiav
4. Qhib lub hau npog sab saud thiab tshem tawm cov qauv txiav kom tiav cov txheej txheem txiav.
Cov qauv txiav tuaj yeem siv rau cov qauv kev npaj ua ntej xws li kev sib tsoo, sib tsoo, thiab polishing, tom qab ntawd cov iav hardness kuaj lossis ntsuas metallographic tuaj yeem ua tiav.
Post lub sij hawm: Apr-02-2025
