Spot thekiso ea 40Cr tšepe pipe bakeng sa ho sebetsa
Pipe ea tšepe ea 40Cr ke mofuta oa tšepe e chitja e nang le karolo e sekoti ebile ha e na manonyeletso ho potoloha. E entsoe ka phala e tiileng e se nang letho ka ho phunyeha, ebe e etsoa ka ho bilika ho chesang, ho bilika ho batang kapa ho toroea ho batang. Ha ho bapisoa le tšepe e chitja le tšepe e 'ngoe e tiileng, ha ho kobeha le matla a torsional a tšoana, boima ba phala ea tšepe bo bobebe, e leng mofuta oa tšepe ea karolo ea moruo.
Ho ea ka GB / T 3077-2008: metsoako ea lik'hemik'hale (karolo ea boima,%) C 0,37 ~ 0.44, Si 0,17 ~ 0.37, Mn 0,50 ~ 0.80, cr0.80 ~ 1.10, Ni ≤ 0,30【 Thepa ea mechine]
Mohlala o se nang letho (mm): 25
Mocheso o futhumatsang oa ho tima ha pele (℃): 850; Pholiso: Oli
Mocheso oa bobeli oa ho tima mocheso (℃):-
Mocheso o futhumatsang oa mocheso (℃): 520; Coolant: metsi, oli
Matla a tsitsitseng (σ b/MPa): ≧980
Sebaka sa tlhahiso (σ s/MPa): ≧785
Elong ka mor'a ho robeha(δ 5/%): ≧9
Phokotso ea sebaka(ψ/%): ≧45
Matla a ho monya (aku2 / J): ≥ 47
Brinell hardness (hbs100 / 3000) (e anneal kapa mocheso o phahameng o halefile): ≤ 207
Litekanyetso tse tloaelehileng tsa tšepe tsa GB Chaena ke 40Cr, lisebelisoa tsa DIN No. 1.17035 / 1.7045, DIN 41Cr4 / 42gr4, en 18, BS 41Cr4, AFNOR 42c4, NF 38cr4 / 41Cr4, 4 SS 2 N42C4 American, SAS 2, SAS 4, SA 4, SA 4, SA 4, 4 SS Cr 4, 42 Cr4, AFNOR 42c4, AFNOR 42c4, NF 38cr4. / ASTM Standard Steel No. 5140, Japanese JIS standard steel No. scr440 (H) / scr440, American AISI / SAE / ASTM Standard Steel No. 5140, mokhatlo oa machaba oa Standardization ISO standard steel No. 41Cr4.
(hoo e ka bang) ACM = 780 ℃
Mocheso 850 ~ 870 ℃, boima 179 ~ 229hbs.
Mocheso ke 740 ~ 760 ℃, nako ea ho ts'oara ke 4 ~ 6h, ebe mocheso o pholile ho ≤ 600 ℃ ka sekhahla sa pholileng sa 5 ~ 10 ℃ / h.
Boima pele ho phekolo ≤ 217hbs, boima ka mor'a ho nolofatsa ≤ 163hbs.
(670 ± 10) ℃ × 2H, ho phahama ha mocheso ka sebōpi, (710 ± 10) ℃ × 2H, ho pholile ka sebōpi, (670 ± 10) ℃ × 2H, ho phahama ha mocheso ka sebōpi, (710 ± 10) ℃ × 2H, ebe o theola mocheso ka sebōpi, (670 ± 10) ℃ × 2H, ho phahama ha mocheso ka sebōpi, (710 ± 10) ℃ × 2H, pholisa ka sebōpi bakeng sa lipotoloho tse 3, ebe o pholile ho fihlela 550 ℃ bakeng sa ho pholisa moea. Ho thatafala ka mor'a phekolo ke 153hbs.
Mocheso oa ho tima 850 ℃± 10 ℃, pholiso ea oli; Mocheso o futhumatsang 520 ℃± 10 ℃, metsi, oli le moea o pholileng.
Medium carbon modulated steel, batang heading die steel. Tšepe e na le theko e itekanetseng le ho sebetsa habonolo. Ka mor'a phekolo e nepahetseng ea mocheso, e ka fumana boima bo itseng, polasetiki le ho hanyetsa ho apara. Ho tloaeleha ho ka khothaletsa spheroidization ea lisele le ho ntlafatsa ts'ebetso ea ho seha likheo ka boima bo ka tlase ho 160hbs. E halefile ho 550 ~ 570 ℃, tšepe e na le lisebelisoa tse ntle ka ho fetisisa tsa mochini. Ho thatafala ha tšepe ena ho phahame ho feta 45 tšepe. E loketse kalafo e thatafatsang holim'a metsi joalo ka ho tima khafetsa khafetsa le ho tima lelakabe.
Ka mor'a ho tima le ho futhumatsa, tšepe ena e sebelisetsoa ho etsa likarolo tsa mechine tse nang le mojaro o bohareng le lebelo le bohareng, joalo ka sekontiri sa ho tsamaisa, sekontiri se ka morao sa koloi, gear, shaft, worm, spline shaft, sleeve ea bohareng, joalo-joalo ka sesebelisoa sa mochine; Kamora ho tima le ho futhumatsa mocheso o mahareng, e sebelisetsoa ho etsa likarolo tse nang le mojaro o phahameng, tšusumetso le lebelo le mahareng, joalo ka gear, shaft e kholo, rotor ea pompo ea oli, block e thellang, molala, jj; Ka mor'a ho tima le mocheso o tlase oa mocheso, o sebelisetsoa ho etsa likarolo tse nang le moroalo o boima, tšusumetso e tlaase, ho hanyetsa ho roala le botenya bo tiileng ho feta 25mm karolong, joalo ka seboko, shaft e kholo, shaft, molaleng, joalo-joalo; Ka mor'a ho tima le ho chesa le ho tima metsi a mangata, e sebelisetsoa ho etsa likarolo tse nang le boima bo phahameng ba holim'a metsi le ho roala ho hanyetsa ntle le tšusumetso e kholo, joalo ka gear, sleeve, shaft, shaft e kholo, crankshaft, spindle, pin, rod e kopanyang, screw, nut, inlet valve, joalo-joalo Ho phaella moo, tšepe ena e boetse e loketse ho etsa likarolo tse sa tšoaneng tsa phetisetso tse tšoaroang ke carbonitriding, tse kang likere le li-shafts tse nang le bophara bo boholo le boima bo botle ba mocheso o tlaase.
Anealed, boima ≤ 207hbs. 40Cr elastic modulus: elastic modulus E (20 ℃) / MPA 200000 ~ 211700, shear modulus G (20 ℃) 80800
Mokhoa oa ho tima 40Cr
40Cr quenching, 850 ℃, pholiso ea oli; Ho futhumatsa 520 ℃, ho pholisa metsi, ho futhumatsa oli. Bokaholimo bo timang boima ba phala ea tšepe ea 40Cr ke hrc52-60, 'me ho tima lelakabe ho ka fihla hrc48-55.
40Cr kalafo ea nitriding
40Cr ke ea tšepe ea nitrided, 'me likarolo tsa eona li thusa ho nitriding. 40Cr e ka fumana boima bo phahameng ba holim'a metsi ka mor'a phekolo ea nitriding, 'me boima bo phahameng ka ho fetisisa ka mor'a phekolo ea nitriding bo ka fihla hra72 ~ 78, ke hore, hrc43 ~ 55. ho sila. Hobane lera la nitrided le tšesaane ebile le brittle, ho hlokahala hore ho be le sebopeho sa mantlha se matla, ka hona hoa hlokahala ho etsa kalafo ea ho tima le ho futhumatsa mocheso pele ho fumana sorbite e halefileng le ho ntlafatsa thepa ea mochini oa mantlha le boleng ba eona. lera le nang le nitrided. Soft nitriding ke nitriding e sebetsang, 'me nitriding ea khase e sebelisoa hangata
40Cr welding
Pele ho tjheseletsa ea 40Cr, ela hloko preheating ho thibela ho tima ho phatloha ka har'a weld ka lebaka la ho phatloha ha mocheso oa matrix. Ho molemo ho tloaeleha pele ho welding.
Weldability ea 40Cr: ho bonolo ho arola nakong ea kristale 'me e na le maikutlo a ho phunyeha ha crystallization (mofuta oa ho phatloha ha mocheso). Ho bonolo ho petsoha ka har'a crater le karolo ea concave ka har'a weld nakong ea ho cheselletsa. Ka lik'habone tse phahameng, ho bonolo ho fumana sebopeho se thata (martensite) se amehang haholo mapetsong a batang nakong ea ho pholile ka potlako. Ha sekhahla sa ho pholisa sa sebaka se chesang haholo se le seholo, ho bonolo ho theha martensite e thata le e brittle e phahameng ea carbon le ho kokobetsa sebaka se chesang haholo.
1. Welding ka kakaretso e etsoa annealed (normalized) mmuso.
2. Mokhoa oa ho tjheseletsa ha o felle
3.Thempereichara ea preheating e ka eketsoa ka nepo ka matla a maholo a mela. Ka kakaretso, mocheso oa preheating le mocheso oa interlayer o ka laoloa pakeng tsa 250 ~ 300 ℃.
4. Thepa ea welding e tla etsa bonnete ba hore sebopeho sa tšepe e kentsoeng se tšoana hantle le sa tšepe ea motheo, joalo ka j107-cr.
5.Phekolo ea ho tima le ho futhumatsa mocheso e tla etsoa ka nako ka mor'a ho cheselletsa. Haeba ho le thata ho etsa kalafo ea quenching le tempering ka nako, annealing ea mahareng kapa ho ts'oara mocheso o phahameng ho feta preheating ka nako e itseng ho ka etsoa ho felisa haedrojene e pharalletseng le ho nolofatsa sebopeho. Bakeng sa lihlahisoa tse nang le sebopeho se rarahaneng le li-welds tse ngata, ho ka etsoa annealing e bohareng ka mor'a ho tjheseletsa palo e itseng ea li-welds.
