Chitsulo cha crankshaft C38N2 ndi mtundu watsopano wachitsulo chosazimitsidwa komanso chosazimitsidwa, chomwe chimalowa m'malo mwachitsulo chozimitsidwa komanso chotenthedwa kuti chipange ma crankshafts a injini ya Renault. Kupunduka kwamatsitsi apamtunda ndizovuta zomwe zimachitika m'moyo wa ma crankshafts, makamaka chifukwa cha zolakwika zachitsulo monga pores ndi kumasuka mu ingot yoyambirira yomwe imafinyidwa kuchokera pakati mpaka pansi panthawi yakufa. Kupititsa patsogolo mtundu wa pachimake cha crankshaft chakhala cholinga chofunikira pakugubuduza. Ndi kuchepetsa kufewetsa chiphaso pa akugubuduza ndondomeko, ndi kulimbikitsa mapindikidwe pachimake ndi yabwino njira looseness ndi shrinkage pachimake cha welded kuponyedwa dongosolo.

Akatswiri ochokera ku yunivesite ya Science and Technology ku Beijing aphunzira momwe zinthu zimakhalira, kutentha kwa deformation, kuchuluka kwa mapindikidwe, kuchuluka kwa mapindikidwe, ndikudutsa pakapita nthawi pazitsulo zosazimitsidwa komanso zotentha za C38N2 kugudubuzika kwa crankshafts kudzera mu kuyesa koyerekeza kwamafuta, zitsulo zowoneka bwino komanso kufalitsa. mawonekedwe a electron microscopy. Lamulo lachikoka la gawo la static recrystallization voliyumu ndi kuchuluka kwa zovuta zotsalira pakati pa zodutsa.

Zotsatira zoyesera zikuwonetsa kuti pakuwonjezeka kwa kutentha kwa deformation, kuchuluka kwa deformation, kuchuluka kwa deformation kapena nthawi yapakati pakati pa zodutsa, gawo la voliyumu ya static recrystallization limakula pang'onopang'ono, ndipo kuchuluka kwa zovuta zotsalira kumachepa. ; The original austenite tirigu kukula ukuwonjezeka, ndi malo amodzi recrystallization voliyumu kachigawo amachepetsa, koma kusintha si kofunika; m'munsimu 1250 ℃, ndi kutentha austenitizing kuwonjezeka, malo amodzi recrystallization voliyumu kachigawo si kuchepa kwambiri, koma Pamwamba pa 1250 ℃, kuwonjezeka austenitizing kutentha mwachionekere amachepetsa malo amodzi recrystallization voliyumu kachigawo. Kudzera liniya koyenera ndi mabwalo ang'onoang'ono njira, masamu chitsanzo cha ubale pakati pa malo amodzi recrystallization voliyumu kachigawo ndi osiyana mapindikidwe ndondomeko magawo analandira; masamu omwe alipo otsalira amawunikiridwanso, ndipo masamu otsalira a strain rate omwe ali ndi nthawi ya strain rate amapezedwa. Kukwanira bwino.