42CrMo aloyi zitsulo chitoliro wopanga chitsimikizo malonda
Cholinga cha 42CrMo chitoliro chosasunthika chachitsulo: chitsulo chapadera cha mlatho ndi "42CrMo", chitsulo chapadera chazitsulo zamagalimoto ndi "42CrMo", ndipo chitsulo chapadera chopangira mphamvu ndi "42CrMo". Chitsulo chamtunduwu chimapangitsa kuti zitsulo zisamayende bwino posintha mpweya wa carbon (c). Choncho, malinga ndi carbon okhutira, mtundu uwu wa zitsulo akhoza kugawidwa mu: otsika mpweya zitsulo - mpweya zili zambiri zosakwana 0,25%, monga 10 ndi 20 zitsulo; Sing'anga mpweya zitsulo - zili mpweya zambiri pakati 0,25 ~ 0,60%, monga 35 ndi 45 zitsulo; Mkulu wa carbon zitsulo - mpweya wa carbon nthawi zambiri umaposa 0.60%. Chitsulo chamtunduwu sichimagwiritsidwa ntchito popanga mapaipi achitsulo. Chitsulo cha 42CrMo ndi chitsulo champhamvu kwambiri chokhala ndi mphamvu zambiri komanso kulimba, kulimba bwino, kusakhazikika kwamphamvu, kuchepa kwa kutopa kwambiri komanso kukana kukhudzidwa kosiyanasiyana pambuyo pozimitsa ndi kutenthetsa chithandizo, komanso kulimba kwamphamvu kwa kutentha kochepa. Chitsulo cha 42CrMo ndi choyenera kupanga nkhungu zapulasitiki zazikulu komanso zazing'ono zomwe zimafuna mphamvu komanso kulimba. Kuuma: annealed, 147 ~ 241hb, 42CrMo
Kulimba kwamphamvu σ b (MPa): ≥1080(110)
Mphamvu zokolola σ s (MPa): ≥930(95)
Elongation δ 5 (%): ≥12
Kuchepetsa kwa dera ψ (%): ≥45
Mphamvu yamphamvu Akv (J): ≥ 63
Mphamvu yamphamvu α kv (J/cm2): ≥78(8)
Kulimba: ≤ 217hb
Pofuna kupititsa patsogolo moyo wautumiki wa imfa ku nthawi zoposa 800000, njira yowumitsa yoziziritsira ndi kutentha kwapansi ingagwiritsidwe ntchito pazitsulo zowuma. Pa kuzimitsidwa, izo ziyenera preheated pa 500-600 ℃ kwa maola 2-4, ndiye kusungidwa pa 850-880 ℃ kwa nthawi inayake (osachepera 2 hours), utakhazikika mu mafuta 50-100 ℃ ndi utakhazikika ndi mpweya. Kuuma pambuyo kuzimitsa kumatha kufika 50-52hrc. Pofuna kupewa kusweka, iyenera kutenthedwa pa 200 ℃ nthawi yomweyo. Pambuyo pa kutentha, kuuma kumatha kusungidwa pamwamba pa 48hrc. Njira yochizira madzi osalowerera amchere a vanadization ya 42CrMo zitsulo. Chosanjikiza cha carbide chikhoza kupezedwa ndi kusalowerera ndale mchere wosambitsa vanadization mankhwala a 42CrMo zitsulo.
1. Carbon vanadium pawiri, carburized layer ili ndi mawonekedwe ofanana, kupitiliza kwabwino komanso kuphatikizika, makulidwe a yunifolomu, mawonekedwe ophatikizika, kulimba kwapang'onopang'ono komanso kukana kuvala kwambiri, komanso kuuma kwapamtunda, kukana kuvala ndi kukana kumamatira kumakhala bwino kwambiri.
2.Kusungunuka kwa VC mu austenite ndikokwera kuposa ku ferrite. Ndi kuchepa kwa kutentha, VC imatsika kuchokera ku ferrite, zomwe zimapangitsa kuti aloyi ikhale yolimba ndi kuyeretsa tirigu, ndipo wosanjikiza wamagulu amasonyeza kuuma kwakukulu. Chitsulo cha 42CrMo ndi cha carbon high and high chromium ledeburite steel, yokhala ndi carbide yambiri, yowerengera pafupifupi 20%, ndipo nthawi zambiri imagawidwa mosiyanasiyana mu lamba kapena maukonde, ndi tsankho lalikulu. Komabe, ochiritsira kutentha mankhwala ndi zovuta kusintha carbide tsankho, amene kwambiri zimakhudza makina katundu zitsulo ndi moyo utumiki wa imfa. Maonekedwe ndi kukula kwa carbides kumathandizanso kwambiri pazitsulo zachitsulo. Makamaka, ma carbides akulu akuthwa amagawanitsa kwambiri pazitsulo zachitsulo ndipo nthawi zambiri amakhala gwero la kusweka kwa kutopa. Choncho, m'pofunika kusintha kugubuduza yaiwisi yaiwisi zitsulo, mokwanira kuphwanya eutectic carbides kuwapanga bwino ndi wogawana anagawira, ndi dongosolo CHIKWANGWANI amagawidwa mozungulira patsekeke kapena sanali directionally, Kuti kusintha yopingasa makina katundu zitsulo. .
Panthawi yopangira, billet idzakhumudwitsidwa ndikuchotsedwa kumadera osiyanasiyana nthawi zambiri, ndipo imapangidwa ndi njira ya "zowala ziwiri ndi imodzi yolemetsa", ndiko kuti, billet idzagwedezeka pang'onopang'ono kumayambiriro kwa kuwombera kuti zisawonongeke. Itha kugunda kwambiri pakutentha kwapakati kwa 980 ~ 1020 ℃ kuonetsetsa kuti ma carbides aphwanyidwa. Chitsulo cha 42CrMo sichinapangidwe, ndipo chithandizo cholimba choyenga chimatengedwa, ndiko kuti, kutentha kwachiwiri pa 500 ℃ ndi 800 ℃ ndi chithandizo cholimba cha 1100 ~ 1150 ℃, Kuzimitsa ndi mafuta otentha kapena kuzimitsa kwa isothermal, kutentha kwapamwamba pa 750 ℃, Kutenthetsa pa 960 ℃ mutatha kukonza ndi kutentha komaliza pambuyo poziziritsa mafuta kungathenso kuyeretsa ma carbides, m'mphepete mozungulira ndi ngodya ndikuyenga mbewu.
