Lub hardness ntawm qhov chaw nyob ib ncig ntawm lub weld tuaj yeem pab ntsuam xyuas qhov brittleness ntawm weld, yog li pab koj txiav txim siab seb lub vuam puas muaj lub zog uas yuav tsum tau ua, yog li cov weld Vickers hardness test method yog ib txoj hauv kev uas pab ntsuas qhov zoo ntawm qhov vuam.
Shandong Shancai / Laizhou Laihua Testing Instrument Tuam Txhab Vickers hardness tester tuaj yeem ua qhov kev sim hardness ntawm welded qhov chaw lossis qhov chaw vuam.Thaum kuaj lub hardness ntawm ib tug vuam taw tes, multi-point ntsuas yuav tsum tau ua nyob rau hauv ib tug tej yam deb ntawm lub ntug ntawm tus qauv los yog saum toj ntawm lub vuam taw tes.Tom qab tau txais ntau qhov taw qhia indentation, tus nqi hardness tuaj yeem ntsuas tau los ntawm kev ntsuas tas li thiab cov duab nkhaus tuaj yeem tau txais.
Thaum siv Vickers hardness tester los ntsuas qhov chaw welded, cov xwm txheej hauv qab no yuav tsum raug sau tseg:
1. Flatness ntawm cov qauv: Ua ntej kev sim, peb zom cov weld mus kuaj kom nws nto du, tsis muaj oxide txheej, tawg thiab lwm yam tsis xws luag.
2. Ntawm txoj kab nruab nrab ntawm cov vuam, siv ib qho taw tes ntawm qhov nkhaus ntawm txhua 100 hli rau kev sim.
3. Xaiv lub zog sib txawv yuav ua rau cov txiaj ntsig sib txawv, yog li peb yuav tsum xaiv lub zog ntsuas kom tsim nyog ua ntej kuaj.
Lub microhardness tester muaj qhov yuav tsum tau ua rau saum npoo ntawm cov qauv kuaj, uas yuav tsum tau ua tib zoo npaj raws li cov qauv metallographic.
Lub hauv paus ntsiab lus ntawm kev sim microhardness hauv microhardness test method yog tib yam li Vickers hardness, tab sis cov khoom siv yog me dua li qhov qis-load Vickers hardness, feem ntau tsawg dua 1000g, thiab qhov tshwm sim ntawm qhov pom tsuas yog ob peb microns mus rau ob peb. microns, yog li qhov kev ntsuam xyuas microhardness muab txoj hauv kev yooj yim heev rau kev kawm cov khoom ntawm microstructure ntawm txheej permeable.Nws yog dav siv los txiav txim siab hardness ntawm txhua theem ntawm qhov chaw thiab hauv txheej permeating.
Lub cim ntawm microhardness feem ntau yog qhia los ntawm HV, thiab nws txoj kev txiav txim siab thiab txoj kev zoo ib yam li Vickers hardness method.Lub chaw thau khoom, ntsuas qhov system thiab indenter precision ntawm microhardness tester yog qhov xav tau ntau dua li qhov qis-load Vickers hardness tester.Tam sim no, microhardness tester yog dav siv nyob rau hauv nyias workpieces, thiab vim hais tias lub magnification yuav ncav cuag 400 lub sij hawm, nws yog feem ntau siv raws li ib tug yooj yim metallographic microscope.
Nyob rau hauv tus txheej txheem ntawm kev siv, yuav tsum tau them nyiaj mloog mus rau lub load, micrometer thiab indenter ntawm lub microhardness tester, uas yuav tsum tau soj ntsuam nyob rau hauv ua ntej siv, thiab hardness block yog siv rau kev qhia paub txog nws tus nqi.
Lub microhardness tester siv cov load hauv kev sim ua haujlwm kom du thiab zoo li ua tau, tsis muaj kev cuam tshuam thiab kev co.Txhawm rau kom ntseeg tau qhov tseeb ntawm cov txiaj ntsig kev xeem, feem ntau nws yog qhov yuav tsum tau ntsuas ntau zaus hauv ntau qhov sib txawv, thiab nrhiav qhov nruab nrab tus nqi los sawv cev tus nqi hardness ntawm cov txheej txheem permeability los yog qib alloy.Rau cov txheej txheem infiltration siv nyob rau hauv qhov kub thiab txias, nws hardness yuav ntsuas tau los ntawm kev siv lub siab kub microhardness tester.
Lub sij hawm xa tuaj: Plaub Hlis-10-2024
