Ukuqina kwindawo ejikeleze i-weld kunokunceda ukuvavanya ukunyanzeliswa kwe-weld, ngaloo ndlela kukunceda uqonde ukuba i-weld inamandla afunekayo, ngoko indlela yokuvavanya ubulukhuni be-weld Vickers yindlela enceda ukuvavanya umgangatho we-weld.
I-Shandong Shancai / Laizhou Laihua Testing Instrument Company's Vickers tester hardness inokwenza uvavanyo lokuqina kwiindawo ezidityanisiweyo okanye kwiindawo zokuwelda.Xa uvavanya ubulukhuni bendawo ye-welding, imilinganiselo yamanqaku amaninzi iya kwenziwa kumgama othile ukusuka kumda wesampuli okanye phezulu kwinqanaba le-welding.Emva kokufumana i-multi-point indentation, ixabiso lobunzima linokulinganiswa ngokulinganisa okuqhubekayo kunye negrafu ye-curve inokufumaneka.
Xa usebenzisa i-Vickers tester hardness tester ukuvavanya iindawo ezidityanisiweyo, le miqathango yovavanyo ilandelayo kufuneka iqatshelwe:
1. I-Flatness yesampuli: Ngaphambi kokuvavanya, sigaya i-weld ukuba ivavanywe ukwenza ubuso bayo bube bushelelezi, bukhululekile kwi-oxide layer, i-cracks kunye nezinye iziphene.
2. Kumgca ophakathi we-weld, thatha inqaku kwindawo egobileyo yonke i-100 mm yokuvavanya.
3. Ukukhetha amandla ovavanyo ahlukeneyo kuya kubangela iziphumo ezahlukeneyo, ngoko ke kufuneka sikhethe amandla ovavanyo afanelekileyo phambi kovavanyo.
Umhloli we-microhardness uneemfuno zokugqitywa komphezulu wesampuli evavanyiweyo, efuna ukulungiswa ngononophelo ngokwesampulu ye-metallographic.
Umgaqo wovavanyo lwe-microhardness kwindlela yokuvavanya i-microhardness ifana ncamashi nobulukhuni be-Vickers, kodwa umthwalo osetyenzisiweyo uncinci kunomthwalo ophantsi we-Vickers ubunzima, ngokuqhelekileyo ungaphantsi kwe-1000g, kwaye i-indentation ebangelwa yi-microns ezimbalwa ukuya kwezimbini ezimbalwa. microns, ngoko uvavanyo lwe-microhardness lubonelela ngeendlela ezilula kakhulu zokufunda iipropathi ze-microstructure zomaleko ongenekayo.Isetyenziselwa ngokubanzi ukumisela ubulukhuni besigaba ngasinye kumphezulu kunye nomgangatho ojikelezayo.
Isimboli se-microhardness sivame ukubonakaliswa yi-HV, kwaye umgaqo wayo wokuzimisela kunye nendlela iyafana nendlela yobunzima beVickers.Inkqubo yokulayisha, inkqubo yokulinganisa kunye nokuchaneka kwe-indenter ye-microhardness tester ifuna kakhulu kunomthwalo ophantsi we-Vickers tester hardness.Okwangoku, umvavanyi we-microhardness usetyenziswa ngokubanzi kwizixhobo zokusebenza ezibhityileyo, kwaye ngenxa yokuba ulwandiso lunokufikelela kumaxesha angama-400, luhlala lusetyenziswa njengemakroskopu elula ye-metallographic.
Kwinkqubo yokusetyenziswa, ingqalelo kufuneka ihlawulwe kumthwalo, i-micrometer kunye ne-indenter ye-microhardness tester, ekufuneka ihlolwe ngaphambi kokusetyenziswa, kwaye ibhloko yobunzima isetyenziselwa ukuchongwa okubanzi kwexabiso layo elibonisayo.
Umhloli we-microhardness usebenzisa umthwalo kumsebenzi wokuvavanya njengento egudileyo kunye neyunifomu kangangoko kunokwenzeka, ngaphandle kwempembelelo kunye nokungcangcazela.Ukuze kuqinisekiswe ukuchaneka kweziphumo zovavanyo, ngokuqhelekileyo kuyimfuneko ukulinganisa amaxesha amaninzi kwiindawo ezahlukeneyo, kwaye ufumane ixabiso eliqhelekileyo lokumela ixabiso lobunzima bomgangatho wovavanyo lokungena okanye isigaba se-alloy.Kumaleko wokungeniswa asetyenziswe kwiqondo lokushisa eliphezulu, ubunzima bayo bunokulinganiswa ngokusebenzisa i-microhardness tester ephezulu.
Ixesha lokuposa: Apr-10-2024
