Ho tima tšepe ke ho futhumatsa tšepe ho mocheso oa bohlokoa Ac3a (sub-eutectic steel) kapa Ac1 (over-eutectic steel) ka holim'a mocheso, ho tšoara nako e itseng, e le hore bohle kapa karolo ea austenitization, ebe ka potlako. ho feta tekanyo ea ho pholisa ea bohlokoa ea sekhahla sa ho pholisa ka potlako ho Mofumahatsana ea ka tlase (kapa Mof haufi le isothermal) bakeng sa phetoho ea martensite a (kapa bainite) mokhoa oa phekolo ea mocheso. Hangata hape le lisebelisoa tsa aluminium, lisebelisoa tsa koporo, li-alloys tsa titanium, likhalase tse halefileng le lisebelisoa tse ling tse tiileng mothusi oa tharollo "kapa ka mokhoa o potlakileng oa ho pholisa mocheso o bitsoang quenching".
Sepheo sa ho felisa:
(1) Ntlafatsa thepa ea mochini ea tšepe ka thepa kapa likarolo.
(2) ho ntlafatsa thepa ea thepa kapa lik'hemik'hale tsa tšepe e itseng e khethehileng
Mekhoa ea ho tima: haholo-holo ho tima mokelikeli o le mong, mollo o nang le metsi a mabeli, ho tima ka mekhahlelo, ho tima ha isothermal, ho tima sebakeng se seng joalo-joalo.
Tempering ke tšepe quenched ka lintho tse bonahalang kapa karolo halefile ho mocheso o itseng, ka mor'a ho tšoara nako e itseng, cooled ka tsela e itseng ea mocheso kalafo tshebetso, tempering ke opereishene hang ka mor'a quenching, hangata e boetse e le workpiece bakeng sa mocheso kalafo. ea ts'ebetso ea ho qetela, 'me kahoo ts'ebetso e kopanetsoeng ea ho tima le ho futhumatsa e bitsoa phekolo ea ho qetela.
Mosebetsi oa ho ikoetlisa ke ho:
(1) ho ntlafatsa botsitso ba mokhatlo o hlophisitsoeng, e le hore workpiece ha ho sebelisoa ts'ebetso ha e sa etsahala mokhatlong oa phetoho, e le hore sebopeho sa geometry le thepa li lule li tsitsitse.
(2) Felisa likhatello tsa ka hare e le ho ntlafatsa ts'ebetso ea mosebetsi oa matsoho le ho tsitsisa geometry ea workpiece.
(3) fetola thepa ea mochine ea tšepe ho finyella litlhoko tsa tšebeliso.
Litlhoko tsa ho futhumatsa: litšebeliso tse fapaneng tsa workpiece li lokela ho fokotsoa ka mocheso o fapaneng ho fihlela litlhoko tse sebelisoang. (1) lisebelisoa tsa ho itšeha, li-bearings, likarolo tse tingoeng tsa carburizing, likarolo tse timang holim'a metsi hangata li halefile ho 250 ℃ ka tlase ho mocheso o tlase, mocheso o tlase oa mocheso ka mor'a hore boima bo se ke ba fetoha haholo, khatello ea ka hare e fokotsehile, boima bo fokotseha hanyenyane. ntlafatsoa. (2) selemo ka 350 ~ 500 ℃ tlas'a mocheso oa mocheso o bohareng, o ka fumana elasticity e phahameng le ho tiea ho hlokahalang. (3) likarolo tsa tšepe tse nang le carbon e bohareng tse entsoeng ka mocheso o phahameng oa mocheso hangata ho 500 ~ 600 ℃, e le ho fumana matla a loketseng le ho tiea ha papali e ntle.
Normalizing ke mofuta oa phekolo ea mocheso ho ntlafatsa ho tiea ha tšepe, likarolo tsa tšepe li futhumatsoa ho mocheso oa Ac3 ka holimo ho 30 ~ 50 ℃, ka mor'a ho tšoara nako e itseng ho tsoa moeeng o pholileng. Tšobotsi e ka sehloohong ke hore lebelo la ho pholisa le potlakile ho feta ho khutla le ho fokotseha ho feta ho tima, ho tloaeleha ho ka ba ho pholile hanyenyane ka potlako ho ntlafatso ea kristale ea lijo-thollo tsa tšepe, molekane ea tlatsanang a ka fumana matla a khotsofatsang, 'me a ka ntlafatsa haholo capriciousness e nyenyane (boleng ba AKV). ), fokotsa tšekamelo ea ho petsoha ha karolo, poleiti e 'ngoe e tlase e chesang e chesang, lisebelisoa tse tlase tsa tšepe le li-castings ka ho tloaeleha, lisebelisoa tse akaretsang tsa thepa li ka bapaloa ho ntlafatsa, empa hape le ho ntlafatsa ts'ebetso ea Cutting.
Annealing ke tšepe e futhumetseng butle-butle ho mocheso o itseng, e bolokiloe ka nako e lekaneng, ebe ka tekanyo e loketseng ea sebaka se batang sa ts'ebetso ea phekolo ea mocheso oa tšepe. Kalafo ea mocheso oa Annealing e arotsoe ka ho annealing ka ho feletseng, ho koala ho sa fellang le ho fokotsa khatello ea kelello. Thepa ea mochini oa thepa e kentsoeng e ka sebelisoa tekong ea tensile ho Kinze, e ka boela ea bonoa ka tlhahlobo ea boima. Lisebelisoa tse ngata tsa tšepe li fanoa ka boemo bo khutliselitsoeng mocheso, liteko tsa boima ba tšepe li ka sebelisoa tester ea thata ea Locke, teko ea boima ba HRB, bakeng sa lipoleiti tse tšesaane tsa tšepe, likhoele tsa tšepe le li-tubes tsa tšepe tse nang le marako a masesaane, o ka sebelisa tester ea thata ea Locke. , thepa ea mohaho HRT thata.
Sepheo sa quenching le annealing: 1 ho ntlafatsa thepa ho felisa rigid u ka ho lahla, forging, rolling le tjheseletsa tshebetso e bakoang ke mefuta e fapaneng ya mefokolo ea mokhatlo o hlophisitsoeng, hammoho le khatello ea kelello masala, ho thibela deformation ea workpiece, cracking. 2 ho nolofatsa sesebediswa e le ho phetha seha. 3 ho hloekisa lijo-thollo, ho ntlafatsa mokhatlo e le ho ntlafatsa thepa ea mochine oa workpiece. 4 bakeng sa phekolo ea ho qetela ea mocheso (ho tima, ho halefisa) ho etsa mosebetsi o motle oa litekanyetso tsa mokhatlo.
Mekhoa e sebelisoang hangata ea annealing ke:
(1) ho tlatsa ka botlalo. E sebelisoa ho hloekisa tšepe e bohareng le e ka tlase ea k'habone ka ho lahla, ho forging le ho tjheseletsa ka mor'a ho hlaha ha thepa e futsanehileng ea lithane tse matla tse chesang haholo.
(2) ho koaleha ha spheroidal annealing. E sebelisetsoa ho fokotsa boima bo phahameng ba tšepe ea tšepe le tšepe ea ho jara ka mor'a ho qhekella.
(3) ho koaheloa ha isothermal. E sebelisoa ho Jiangdu nickel e itseng, chromium content angle steel alloy structural steel high hardness.
(4) recrystallization annealing. E sebelisoa ho terata ea tšepe ea trolley, lakane setšoantšong se batang, ts'ebetso e batang ea ho thatafatsa (bothata boa eketseha, polasetiki ea fokotseha)
(5) graphitization annealing. E sebelisetsoa ho etsa tšepe e entsoeng ka tšepe e nang le palo e kholo ea 'mele oa carburized hore e be tšepe e bonolo e nang le polasetiki e ntle.
(6) annealing ea ho hasana. E sebelisetsoa ho etsa motsoako oa lik'hemik'hale oa li-alloy castings junifomo, ho ntlafatsa ts'ebetso ea eona.
(7) ho fokotsa khatello ea maikutlo. E sebelisetsoa ho felisa khatello ea kelello ea ka hare ea li-castings tsa tšepe le li-weldments.
Nako ea poso: Dec-01-2024
