Litlhoko tse matla tse fokolang tsa matla le microscopic (matla a phahameng). The low magnification microstructure eae nang le tšepee bua ka kakaretso hlephileng, setsi se hlephileng le karohano, 'me microscopic (phahameng magnification) microstructure akarelletsa annealing microstructure ea tšepe, carbide netweke, hlobolisa le mokelikeli ho iphetola ha lintho, joalo-joalo Tharollo carbide e thata ebile e brittle, 'me kotsi ea eona e tšoana le ea ho kenngoa ha brittle. Carbide ea marang-rang e fokotsa matla a ts'ebetso ea tšepe 'me e etsa hore mohaho o se ke oa lekana, o bonolo ho o senya le ho senya nakong ea ho tima. Li-carbide tse nang le li-band li ama microstructure e tsitsitseng le e timang le matla a ho kopana le mokhathala. Boleng ba sebopeho sa matla a tlaase le a phahameng a na le tšusumetso e kholo mosebetsing le bophelo ba tšebeletso ea li-rolling bearings, kahoo ho na le litlhoko tse thata bakeng sa mohaho o tlaase le o phahameng oa matla a ho jara litekanyetso tsa thepa.
Litlhoko tse thata haholo bakeng sa mefokolo ea bokaholimo le mefokolo ea kahare. Bakeng sa ho jara tšepe, mefokolo ea holim'a metsi e kenyelletsa mapetsong, ho kenngoa ha slag, li-burrs, scarring, letlalo la oxide, joalo-joalo, le mefokolo ea ka hare e kenyelletsa likoti tsa shrinkage, li-bubble, matheba a masoeu, porosity e tebileng le ho arohana. Litšitiso tsena li na le tšusumetso e kholo ts'ebetsong ea li-bearings, ts'ebetso e jereng le bophelo. Ho boletsoe ka ho hlaka ho litekanyetso tsa thepa hore mefokolo ena ha e lumelloe.
Litlhoko tse thata tsa carbide inhomogeneity. Ka ho jara tšepe, haeba ho na le kabo e tebileng ea carbide e sa lekaneng, ho bonolo ho baka microstructure e sa lekanang le ho ba thata nakong ea kalafo ea mocheso. Microstructure e sa lekaneng ea tšepe e na le tšusumetso e kholo ho matla a mokhathala oa ho kopana. Ho phaella moo, carbide non-uniformity e tebileng e boetse e le bonolo ho senya likarolo tsa ho jara nakong ea pholileng ea quenching, 'me carbide non-uniformity e tla boela e lebise ho fokotsa bophelo ba ho beleha. Ka hona, ho jara litekanyetso tsa thepa, ho na le litlhoko tse khethehileng bakeng sa litlhaloso tse fapaneng tsa tšepe.
Litlhoko tse tebileng tsa bokaholimo ba decarburization. Ho na le melao e thata holim'a lera holim'a decarburization tšepe ka ho beha litekanyetso tsa thepa. Haeba bokaholimo ba decarburization lera feta sekoahelo e behilweng ea maemo a, 'me e sa ka ho feletseng tlosoa tshebetso ya ho sebetsa pele mocheso kalafo, ho ke ke ho le bonolo ho hlahisa quenching mapetsong a tshebetso quenching mocheso quenching, ho fella ka sekala sa likarolo.
Boemong ba thepa ea tšepe e nang le tšepe, ho boetse ho na le litlhokahalo tse thata mabapi le mokhoa oa ho qhibilihisa, dikahare tsa oksijene, ho thatafala ha annealing, fracture, likarolo tse setseng, tlhahlobo ea spark, boemo ba phano, ho tšoaea joalo-joalo.
Nako ea poso: Apr-12-2023