42CrMo phala ea tšepe e se nang moelike ea tšepe e matla e phahameng haholo, e nang le matla a phahameng le ho tiea, ho thatafala hamonate, ha ho na brittleness e hlakileng, mokhathala o mongata le ho hanyetsa litšusumetso tse ngata ka mor'a ho tima le ho halefa, le ho ba le tšusumetso e ntle ea mocheso o tlase.
Tšepe e loketse ho etsa liforomo tsa polasetiki tse kholo le tse mahareng tse hlokang matla le boima bo itseng.Mofuta oa eona o lumellanang oa ISO: 42CrMo4 e lumellana le mofuta oa Majapane: scm440 e lumellana le mofuta oa Sejeremane: 42CrMo4 e batla e lumellana le mofuta oa Amerika: litšoaneleho tse 4140 le boholo ba ts'ebeliso: matla a phahameng, boima bo phahameng, boima bo botle, bofokoli bo bonyenyane nakong ea ho tima, le matla a phahameng a ho qhekella. matla a ho mamella mocheso o phahameng.E sebelisetsoa ho etsa forgings ka matla a phahameng le a maholo a tingoang le a halefileng ho feta tšepe ea 35CrMo, joalo ka likere tse kholo bakeng sa ho ts'oara li-locomotive traction, li-supercharger transmission gears, li-shafts tse ka morao, lithupa tse hokelang le likotoana tsa selemo tse nang le mojaro o moholo, manonyeletso a liphaephe le ho tšoasa litlhapi. lisebelisoa tsa liliba tse tebileng tsa oli tse ka tlase ho 2000m, le liforomo tsa mochini o kobehang.
Sebopeho sa lik'hemik'hale tsa 42CrMo seamless tšepe pipe: c: 0.38% - 0.45%, si: 0.17% - 0.37%, mn: 0.50% - 0.80%, cr: 0.90% - 1.20%, mo: 0.15% - 0.25%, Ni 0.25% 0.030%, P ≤ 0.030%, s ≤ 0.030%
Karolo ea likarolo tse fapaneng tsa lik'hemik'hale liphaepheng tsa tšepe:
Khabone (c):ka tšepe, ho phahama ha carbon content, ho phahamisa matla le ho thatafala ha tšepe, empa polasetiki le ho tiea le tsona li tla fokotseha;Ho e-na le hoo, ho fokotseha ha carbon content, ho phahamisa polasetiki le ho tiea ha tšepe, 'me matla a eona le boima ba eona le tsona li tla fokotseha.
Silicone (SI):e kenyellelitsoe ho tšepe e tloaelehileng ea carbon e le deoxidizer.Palo e nepahetseng ea silicon e ka ntlafatsa matla a tšepe ntle le litlamorao tse mpe ho polasetiki, boima ba tšusumetso, ts'ebetso e batang ea ho kobeha le ho cheseha.Ka kakaretso, dikahare tsa silicon tsa tšepe e bolailoeng ke 0.10% - 0.30%, 'me litaba tse phahameng haholo (ho fihlela ho 1%) li tla fokotsa polasetiki, ho tiea ha ts'ebetso, ho hanyetsa mafome le ho cheseha ha tšepe.
Manganese (MN):ke deoxidizer e fokolang.Palo e nepahetseng ea manganese e ka ntlafatsa matla a tšepe ka katleho, ea felisa tšusumetso ea sebabole le oksijene ho brittleness e chesang ea tšepe, ea ntlafatsa ts'ebetso e chesang ea tšepe, 'me ea ntlafatsa tšekamelo ea tšepe e batang, ntle le ho fokotsa haholo polasetiki le tšusumetso. boima ba tshepe.Likahare tsa manganese ka tšepe e tloaelehileng ea carbon ke hoo e ka bang 0.3% - 0.8%.Lintho tse phahameng haholo (ho fihlela ho 1.0% - 1.5%) li etsa hore tšepe e be thata le e thata, 'me e fokotsa ho hanyetsa mafome le ho cheseha ha tšepe.
Chromium (CR):e ka ntlafatsa matla le ho tiea ha tšepe ea k'habone maemong a rolling.Fokotsa bolelele le ho fokotsa sebaka.Ha litaba tsa chromium li feta 15%, matla le boima bo tla fokotseha, 'me bolelele le ho fokotseha ha sebaka ho tla eketseha ka tsela e tšoanang.Likarolo tse nang le tšepe ea chromium li bonolo ho fumana boleng bo holimo ba ho sebetsa ka mor'a ho sila.
Mosebetsi o ka sehloohong oa chromium ka tšepe e tingoeng le e halefileng ke ho ntlafatsa ho thatafala.Ka mor'a ho tima le ho chesa, tšepe e na le lisebelisoa tse molemo ka ho fetisisa tsa mochine, 'me chromium e nang le carbides e ka thehoa ka tšepe e nang le carburized, e le ho ntlafatsa ho hanyetsa ha thepa ea thepa.Chromium ke e 'ngoe ea lintho tsa bohlokoa ka har'a tšepe e sa hloekang, eo haholo-holo e ntlafatsang ho thibela mafome, ho thatafala le ho se sebetse ha tšepe.
Molybdenum (MO):molybdenum e ka ntlafatsa lijo-thollo tsa tšepe, ea ntlafatsa ho thatafala le matla a mocheso, 'me ea boloka matla a lekaneng le khanyetso ea creep ka mocheso o phahameng (khatello ea nako e telele le deformation ka mocheso o phahameng, o bitsoang creep).Ho kenyelletsa molybdenum ho tšepe ea sebopeho ho ka ntlafatsa thepa ea mochini.E ka boela ea thibela ho brittleness ha tšepe ea alloy e bakoang ke mollo.
Sebabole:ntho e kotsi.E tla etsa hore ho be le mocheso o chesang oa tšepe le ho fokotsa polasetiki, ho ba le tšusumetso e matla, matla a mokhathala le ho hanyetsa mafome a tšepe.Sebabole se entsoeng ka tšepe bakeng sa kaho e akaretsang ha se na ho feta 0.055%, 'me se ke ke sa feta 0.050% ka mehaho e cheselitsoeng.Phosphorus: ntho e kotsi.Le hoja e ka ntlafatsa matla le ho hanyetsa mafome, e ka fokotsa ka ho teba polasetiki, ho ba le tšusumetso e matla, ts'ebetso e batang ea ho kobeha le ho cheseha, haholo-holo mocheso o batang ka mocheso o tlaase.Likahare li lokela ho laoloa ka thata, ka kakaretso li se ke tsa feta 0.050%, 'me li se ke tsa feta 0.045% meahong e cheselitsoeng.Oksijene: ntho e kotsi.Baka ho chesa brittleness.Ka kakaretso, litaba li tlameha ho ba ka tlase ho 0.05%.Naetrojene: e ka matlafatsa tšepe, empa e fokotsa haholo polasetiki, ho tiea, ho cheseha le thepa e batang ea tšepe ea tšepe, 'me ea eketsa tšekamelo ea botsofali le brittleness e batang.Ka kakaretso, litaba li tlameha ho ba ka tlase ho 0.008%.
Nako ea poso: Aug-11-2022