Welding point ya Micro Vickers hardness test method

Kuuma kwa malo ozungulira kuwotcherera kungathandize kuwunika kuwonongeka kwa weld, potero kukuthandizani kudziwa ngati weld ali ndi mphamvu yofunikira, kotero njira yoyezetsa kuuma kwa weld Vickers ndi njira yomwe imathandiza kuyesa mtundu wa weld.

Shandong Shancai /Laizhou Laihua Testing Instrument Company's Vickers hardness tester amatha kuyesa kuuma pazigawo zowotcherera kapena zowotcherera.Poyesa kuuma kwa malo owotcherera, miyeso ya mfundo zambiri idzapangidwa pamtunda wina kuchokera pamphepete mwa chitsanzo kapena pamwamba pa malo otsekemera.Pambuyo popeza ma indentation ambiri, mtengo wa kuuma ukhoza kuyesedwa ndi kuyeza kosalekeza ndipo graph curve ingapezeke.

Mukamagwiritsa ntchito Vickers hardness tester kuyesa zida zowotcherera, zotsatirazi ziyenera kudziwidwa:

1. Flatness of the sample: Tisanayambe kuyezetsa, timagaya weld kuti tiyesedwe kuti ikhale yosalala, yopanda oxide wosanjikiza, ming'alu ndi zolakwika zina.

2. Pakatikati pa mzere wowotcherera, tengani mfundo pamtunda wokhota pamamilimita 100 aliwonse kuti muyese.

3. Kusankha magulu oyesera osiyanasiyana kudzabweretsa zotsatira zosiyana, choncho tiyenera kusankha mphamvu yoyesera yoyenera tisanayesedwe.

Woyesa wa microhardness ali ndi zofunikira pakumaliza kwachitsanzo choyesedwa, chomwe chiyenera kukonzedwa mosamala malinga ndi chitsanzo cha metallographic.

Mfundo yoyesera ya microhardness mu njira yoyesera ya microhardness ndiyofanana ndendende ndi kuuma kwa Vickers, koma katundu wogwiritsidwa ntchito ndi wocheperapo kusiyana ndi kuuma kwa Vickers, nthawi zambiri zosakwana 1000g, ndipo zotsatira zake zimangokhala ma microns ochepa mpaka awiri ochepa. ma microns, kotero kuyesa kwa microhardness kumapereka njira yabwino kwambiri yophunzirira mawonekedwe a microstructure a gawo lovomerezeka.Amagwiritsidwa ntchito kwambiri kuti adziwe kuuma kwa gawo lililonse pamtunda komanso pamtunda wodutsa.

Chizindikiro cha microhardness nthawi zambiri chimawonetsedwa ndi HV, ndipo mfundo yake yotsimikiza ndi njira ndizofanana ndi njira ya Vickers kuuma.Dongosolo lotsitsa, makina oyezera komanso kulondola kwapang'onopang'ono kwa microhardness tester ndizofunika kwambiri kuposa za Vickers hardness tester yotsika.Pakali pano, microhardness tester chimagwiritsidwa ntchito workpieces woonda, ndipo chifukwa makulitsidwe akhoza kufika nthawi 400, nthawi zambiri ntchito ngati microscope yosavuta metallographic.

Pogwiritsa ntchito, chidwi chiyenera kuperekedwa kwa katundu, micrometer ndi indenter ya microhardness tester, yomwe iyenera kufufuzidwa musanagwiritse ntchito, ndipo chipika cholimba chimagwiritsidwa ntchito kuti chizindikiritse bwino mtengo wake.

Woyesa wa microhardness amagwiritsa ntchito katunduyo poyesa ngati wosalala komanso wofanana momwe angathere, popanda kukhudzidwa ndi kugwedezeka.Pofuna kutsimikizira kulondola kwa zotsatira za mayeso, nthawi zambiri ndikofunikira kuyeza kangapo m'magawo osiyanasiyana, ndikupeza mtengo wapakati woyimira kuuma kwa gawo la mayeso a permeability kapena gawo la alloy.Kwa wosanjikiza wolowera womwe umagwiritsidwa ntchito kutentha kwambiri, kuuma kwake kumatha kuyesedwa pogwiritsa ntchito choyesa chapamwamba cha microhardness.