Qhov nyuaj ntawm qhov chaw nyob ib puag ncig qhov vuam tuaj yeem pab soj ntsuam qhov brittleness ntawm qhov vuam, yog li pab koj txiav txim siab seb qhov vuam puas muaj lub zog xav tau, yog li qhov vuam Vickers hardness testing method yog ib txoj kev uas pab soj ntsuam qhov zoo ntawm qhov vuam.
Shandong Shancai /Laizhou Laihua Testing Instrument Company lub Vickers hardness tester tuaj yeem ua qhov kev sim hardness ntawm cov khoom welded lossis thaj chaw vuam. Thaum kuaj qhov hardness ntawm qhov chaw vuam, kev ntsuas ntau qhov yuav ua rau ntawm qhov deb ntawm ntug ntawm cov qauv lossis sab saum toj ntawm qhov chaw vuam. Tom qab tau txais ntau qhov indentation, tus nqi hardness tuaj yeem ntsuas los ntawm kev ntsuas tas mus li thiab daim duab nkhaus tuaj yeem tau txais.
Thaum siv Vickers hardness tester los sim cov khoom welded, cov xwm txheej xeem hauv qab no yuav tsum tau sau tseg:
1. Kev tiaj tus ntawm cov qauv: Ua ntej kuaj, peb zom cov weld kom raug kuaj kom nws qhov chaw du, tsis muaj oxide txheej, tawg thiab lwm yam tsis zoo.
2. Ntawm txoj kab nruab nrab ntawm qhov vuam, siv ib qho taw tes rau ntawm qhov chaw nkhaus txhua 100 hli rau kev sim.
3. Kev xaiv cov zog sib txawv yuav ua rau muaj cov txiaj ntsig sib txawv, yog li peb yuav tsum xaiv cov zog sib txawv ua ntej kev sim.
Lub tshuab ntsuas microhardness muaj qhov yuav tsum tau ua rau qhov tiav ntawm qhov qauv kuaj, uas yuav tsum tau npaj kom zoo raws li cov qauv metallographic.
Lub hauv paus ntsiab lus ntawm kev sim microhardness hauv txoj kev sim microhardness yog tib yam li Vickers hardness, tab sis qhov hnyav siv yog me dua li qhov hnyav Vickers hardness qis, feem ntau tsawg dua 1000g, thiab qhov indentation tshwm sim tsuas yog ob peb microns txog ob peb ob microns, yog li qhov kev sim microhardness muab ib txoj hauv kev yooj yim heev rau kev kawm cov khoom microstructure ntawm cov txheej permeable. Nws yog siv dav los txiav txim siab qhov hnyav ntawm txhua theem ntawm qhov chaw thiab hauv cov txheej permeating.
Lub cim ntawm microhardness feem ntau yog qhia los ntawm HV, thiab nws txoj cai txiav txim siab thiab txoj kev zoo ib yam li Vickers hardness method. Lub kaw lus thauj khoom, lub kaw lus ntsuas thiab qhov tseeb ntawm indenter ntawm microhardness tester yog qhov nyuaj dua li ntawm qhov tsawg-load Vickers hardness tester. Tam sim no, microhardness tester yog siv dav hauv cov workpieces nyias, thiab vim tias qhov magnification tuaj yeem ncav cuag 400 zaug, nws feem ntau siv ua lub tshuab microscope yooj yim metallographic.
Thaum siv, yuav tsum tau them sai sai rau qhov thauj khoom, micrometer thiab indenter ntawm lub microhardness tester, uas yuav tsum tau kuaj xyuas ua ntej siv, thiab lub hardness block siv rau kev txheeb xyuas tag nrho ntawm nws tus nqi qhia.
Lub tshuab ntsuas microhardness siv lub nra hnyav hauv kev ua haujlwm sim kom du thiab sib xws li sai tau, tsis muaj kev cuam tshuam thiab kev co. Yuav kom ntseeg tau qhov tseeb ntawm cov txiaj ntsig sim, feem ntau nws yuav tsum ntsuas ntau zaus hauv ntau qhov chaw sib txawv, thiab nrhiav tus nqi nruab nrab los sawv cev rau tus nqi nyuaj ntawm txheej xeem permeability lossis theem alloy. Rau txheej infiltration siv ntawm qhov kub siab, nws qhov nyuaj tuaj yeem ntsuas los ntawm kev siv lub tshuab ntsuas microhardness kub siab.
Lub sijhawm tshaj tawm: Plaub Hlis-10-2024
