Ho thatafala sebakeng se potolohileng weld ho ka thusa ho hlahloba brittleness ea weld, ka tsela eo ho u thusa hore u tsebe hore na weld e na le matla a hlokahalang, kahoo mokhoa oa ho hlahloba boima ba weld Vickers ke mokhoa o thusang ho lekola boleng ba weld.
Shandong Shancai /Laizhou Laihua Testing Instrument Company's Vickers hardness tester e ka etsa tlhahlobo ea boima ba eona likarolong tse cheselitsoeng kapa libakeng tse chesellang.Ha ho lekoa ho thatafala ha ntlha ea welding, litekanyo tsa lintlha tse ngata li tla etsoa ka sebaka se itseng ho tloha moeling oa sampuli kapa holimo ho ntlha ea welding.Ka mor'a ho fumana indentation ea lintlha tse ngata, boleng ba boima bo ka lekanyetsoa ka tekanyo e tsoelang pele 'me graph ea curve e ka fumanoa.
Ha o sebelisa Vickers hardness tester ho leka likarolo tse cheselitsoeng, maemo a latelang a liteko a lokela ho hlokomeloa:
1. Bophahamo ba sampole: Pele re etsa liteko, re sila weld ho lekoa ho etsa hore bokaholimo ba eona bo boreleli, bo se na lera la oxide, mapetsong le liphoso tse ling.
2. Moleng o bohareng oa weld, nka ntlha holim'a sebaka se kobehileng ka 100 mm bakeng sa tlhahlobo.
3. Ho khetha matla a fapaneng a teko ho tla fella ka liphello tse fapaneng, kahoo re tlameha ho khetha matla a loketseng a teko pele ho tlhahlobo.
Teko ea microhardness e na le litlhoko tsa ho qeta bokaholimo ba sampole e lekiloeng, e hlokang ho lokisoa ka hloko ho latela sampole ea metallographic.
Molao-motheo oa tlhahlobo ea microhardness ka mokhoa oa tlhahlobo ea microhardness o tšoana hantle le boima ba Vickers, empa mojaro o sebelisitsoeng o monyenyane ho feta boima ba Vickers bo tlaase, hangata bo ka tlaase ho 1000g, 'me indentation e hlahisoang ke li-microns tse seng kae ho tse peli tse seng kae. li-microns, kahoo tlhahlobo ea microhardness e fana ka mokhoa o bonolo haholo oa ho ithuta thepa ea microstructure ea lera le ka khonang.E sebelisoa haholo ho fumana hore na karolo e 'ngoe le e' ngoe e thata hakae holim'a metsi le lera le phunyeletsang.
Letšoao la microhardness hangata le hlahisoa ke HV, 'me molao-motheo oa eona oa boikemisetso le mokhoa oa eona o tšoana le mokhoa oa ho thatafala oa Vickers.Sistimi ea ho jarolla, sistimi ea ho lekanya le ho nepahala ha inndenter ea tester ea microhardness li batla ho feta tsa Vickers hardness tester e tlase.Hajoale, tester ea microhardness e sebelisoa haholo ho li-workpieces tse tšesaane, 'me hobane ho holisa ho ka fihla makhetlo a 400, hangata e sebelisoa e le microscope e bonolo ea metallographic.
Nakong ea ts'ebeliso, tlhokomelo e lokela ho lefshoa ho mojaro, micrometer le indenter ea tester ea microhardness, e lokelang ho hlahlojoa pele e sebelisoa, 'me thibela e thata e sebelisetsoa ho khetholla ka ho feletseng boleng ba eona bo bontšang.
Mohlahlobi oa microhardness o sebelisa mojaro ts'ebetsong ea teko e le e boreleli le e ts'oanang ka hohle kamoo ho ka khonehang, ntle le tšusumetso le ho sisinyeha.E le ho etsa bonnete ba ho nepahala ha liphetho tsa liteko, hangata hoa hlokahala ho lekanya makhetlo a 'maloa likarolong tse fapaneng,' me u fumane boleng bo tloaelehileng ho emela boleng ba boima ba sekhahla sa teko ea permeability kapa mohato oa alloy.Bakeng sa lera la ho kenella le sebelisoang mocheso o phahameng, boima ba eona bo ka lekanyetsoa ka ho sebelisa mochine o phahameng oa mocheso oa microhardness.
Nako ea poso: Apr-10-2024
