zinthu 40cr

40Cr ndi GB muyezo zitsulo nambala ku China, ndi 40Cr zitsulo ndi chimodzi mwa zitsulo amagwiritsidwa ntchito kwambiri mu makampani opanga makina.It ali wabwino mabuku mawotchi katundu, zabwino otsika kutentha zimakhudza kulimba ndi otsika notch sensitivity.Good chitsulo kuuma, pamene madzi kuzimitsa kuuma kwa Ф 28 ~ 60 mm, pamene mafuta kuzimitsa zitsulo 40 mamilimita kulinso koyenera Ф 50 mm. cyanidation ndi high frequency quenching.Pamene kuuma ndi 174 ~ 229HB, machinability wachibale ndi 60%.Chitsulo ndi oyenera kupanga sing'anga - kakulidwe nkhungu pulasitiki.

Sing'anga mpweya mpweya zitsulo, ozizira mutu kufa steel.The zitsulo ndi mtengo zolimbitsa, zosavuta pokonza ndipo akhoza kupeza kulimba, plasticity ndi abrasion kukana pambuyo yoyenera kutentha treatment.Normalizing akhoza kusintha ntchito kudula akusowekapo ndi kulimbikitsa microstructure kuyenga ndi kuyandikira mgwirizano state.Kutentha pa 550 ~ 570 ℃ ndipamwamba kuposa zitsulo 45, zoyenera kuzimitsa pafupipafupi, kuzimitsa lawi ndi mankhwala ena owumitsa pamwamba.

Ziwalo za shaft ndi imodzi mwamagawo omwe nthawi zambiri amakumana nawo pamakina. Amagwiritsidwa ntchito kwambiri pothandizira zida zotumizira, kusamutsa torque ndi katundu. Zigawo za shaft ndi ziwalo zozungulira za thupi, kutalika kwake komwe kumakhala kokulirapo kuposa m'mimba mwake, komwe kumapangidwa ndi concentric shaft cylindrical surface, conical surface, dzenje lamkati ndi ulusi komanso ulusi womwe umagwirizana nawo. shaft, hollow shaft ndi crankshaft.

https://www.china-bolt-pin.com/factory-bolts-for-1d-46378h-5772-hex-bolt.html

40Cr ndi chinthu chodziwika bwino cha magawo a shaft. Ndiwotsika mtengo ndipo amatha kuchita bwino podulira pambuyo pozimitsa ndi kutentha (kapena kukhazikika), ndipo amatha kupeza zida zamakina apamwamba monga mphamvu ndi kulimba. Pambuyo kuzimitsa, kuuma kwa pamwamba kumatha kufika 45 ~ 52HRC.

40Cr imagwiritsidwa ntchito kwambiri popanga makina. Chitsulo chamtunduwu chimakhala ndi zida zabwino zamakina. Ichi ndi chitsulo chapakatikati cha carbon alloy chomwe chili ndi ntchito yabwino yozimitsa, 40Cr imatha kuumitsidwa mpaka HRC45 ~ 52. Chifukwa chake, ngati kuuma kwapamwamba kuyenera kukonzedwa bwino komanso makina apamwamba a 40Cr akuyembekezeka kukhazikitsidwa, kukhazikika kwapamwamba kwapang'onopang'ono kumayendetsedwa ndi kukhazikika kolimba kwa 40C. 55-58hrc, kuti mupeze kuuma kwapamwamba kofunikira ndikusunga kulimba mtima kwamtima.