Ukuqina endaweni ezungeze i-weld kungasiza ekuhloleni ukuqina kwe-weld, ngaleyo ndlela kukusize unqume ukuthi i-weld inamandla adingekayo, ngakho-ke indlela yokuhlola ubulukhuni be-weld Vickers iyindlela esiza ukuhlola izinga le-weld.
Umhloli wokuqina wokuqina we-Shandong Shancai/Laizhou Laihua Testing Instrument Company's Vickers angakwazi ukuhlola ubulukhuni ezingxenyeni ezishiselwe noma ezindaweni zokushisela.Lapho kuhlolwa ubulukhuni bephoyinti lokushisela, izilinganiso zamaphuzu amaningi zizokwenziwa ebangeni elithile ukusuka emaphethelweni esampula noma phezulu kwendawo yokushisela.Ngemva kokuthola i-indentation yamaphuzu amaningi, inani lobunzima lingalinganiswa ngokulinganisa okuqhubekayo futhi igrafu yejika ingatholakala.
Uma usebenzisa i-Vickers tester hardness ukuhlola izingxenye ezishiselwe, kufanele kuqashelwe izimo ezilandelayo zokuhlola:
1. Ukucaba kwesampula: Ngaphambi kokuhlola, sigaya i-weld ukuze ihlolwe ukwenza ubuso bayo bushelelezi, bungenawo ungqimba lwe-oxide, imifantu nokunye ukukhubazeka.
2. Emgqeni ophakathi nendawo we-weld, thatha iphoyinti endaweni egobile njalo ngo-100 mm ukuze uhlolwe.
3. Ukukhetha amandla okuhlola ahlukene kuzoholela emiphumeleni ehlukene, ngakho kufanele sikhethe amandla okuhlola afanele ngaphambi kokuhlola.
Umhloli we-microhardness unezidingo zokuqedwa kwendawo yesampula ehloliwe, okudingeka ilungiswe ngokucophelela ngokuya ngesampula ye-metallographic.
Umgomo wokuhlola ubuncane be-microhardness endleleni yokuhlola i-microhardness ifana ncamashi nobulukhuni be-Vickers, kodwa umthwalo osetshenzisiwe mncane kunobulukhuni be-Vickers obunomthwalo ophansi, ngokuvamile bungaphansi kuka-1000g, futhi ukuhlehlisa okuwumphumela kuba ama-microns ambalwa kuya kwamabili ambalwa. ama-microns, ngakho-ke ukuhlolwa kokuqina kwe-microhardness kunikeza izindlela ezilula kakhulu zokufunda izakhiwo ze-microstructure yesendlalelo esivumayo.Isetshenziswa kabanzi ukunquma ubulukhuni besigaba ngasinye ebusweni nasengqimbeni evundlile.
Uphawu lobulukhuni obuncane luvamise ukuvezwa yi-HV, futhi umgomo wayo wokuzimisela kanye nendlela iyafana nendlela yokuqina ye-Vickers.Isistimu yokulayisha, isistimu yokulinganisa kanye nokunemba kwe-indenter yesihloli sokuqina kwe-microhardness kufuna kakhulu kunesihloli sokuqina sokuqina kwe-Vickers esinomthwalo ophansi.Njengamanje, i-microhardness tester isetshenziswa kakhulu kuma-workpiece amancane, futhi ngenxa yokuthi ukukhulisa kungafinyelela izikhathi ezingu-400, kuvame ukusetshenziswa njengesibonakhulu esilula se-metallographic.
Enkambweni yokusetshenziswa, ukunakwa kufanele kukhokhwe kumthwalo, i-micrometer kanye ne-indenter yomhloli we-microhardness, okufanele ihlolwe ngaphambi kokusetshenziswa, futhi i-hardness block isetshenziselwa ukuhlonza okuphelele kwenani layo elibonisayo.
Umhloli we-microhardness sebenzisa umthwalo ekusebenzeni kokuhlola njengokushelela futhi okufanayo ngangokunokwenzeka, ngaphandle komthelela nokudlidliza.Ukuze kuqinisekiswe ukunemba kwemiphumela yokuhlolwa, ngokuvamile kudingekile ukukala izikhathi ezimbalwa ezingxenyeni ezihlukene, futhi uthole inani elimaphakathi elimelela inani lokuqina longqimba lokuhlola lokungena noma isigaba sengxubevange.Okwesendlalelo sokungena esisetshenziswa ekushiseni okuphezulu, ubulukhuni baso bungalinganiswa ngokusebenzisa umhloli we-microhardness wokushisa okuphezulu.
Isikhathi sokuthumela: Apr-10-2024
