I-crankshaft steel C38N2 iwuhlobo olusha lwensimbi engacimilwe futhi ethambile, ethatha indawo yensimbi ecishiwe futhi ethambile ukuze yakhe ama-crankshafts enjini yakwaRenault. Ukulimala kwezinwele ezingaphezulu kuwukukhubazeka okuvamile empilweni yama-crankshafts, ikakhulukazi okubangelwa ukukhubazeka kwensimbi okufana nezimbotshana nokuxega ku-ingot yasekuqaleni ekhanywa kusukela enkabeni kuya phezulu ngesikhathi senqubo yokufaka ukufa. Ukuthuthukisa ikhwalithi ye-core of the crankshaft material ibe umgomo obalulekile enqubweni yokugoqa. Ngokunciphisa ukuthambisa kwephasi ngesikhathi senqubo yokugoqa, futhi ukukhuthaza ukuwohloka komgogodla kuyindlela evumayo yokuxega kanye nokuncipha komnyombo wesakhiwo esihlanganisiwe.

Izazi zaseNyuvesi Yesayensi Nobuchwepheshe eBeijing ziye zafunda imiphumela yezimo eziqinisayo, izinga lokushisa lokuguquguquka, izinga lokuguquguquka, inani lokuguquguquka, kanye nesikhawu sokudlula ku-C38N2 yensimbi engacimekiyo eginqikayo yama-crankshafts ngokuhlolwa kokulingisa okushisayo, i-optical metallography kanye nokudluliselwa. ukubonwa kwe-electron microscopy. Umthetho wethonya wengxenye yevolumu ye-recrystallization emile kanye nenani lesilinganiso esisele phakathi kwamaphasi.

Imiphumela yokuhlola ibonisa ukuthi ngokukhuphuka kwezinga lokushisa lokuguquguquka, izinga lokuguquguquka, inani le-deformation noma isikhathi sokuphumula phakathi kwamaphasi, ingxenye yevolumu ye-static recrystallization ikhula kancane kancane, futhi izinga lokudlula elisele liyancipha. ; Usayizi wokuqala wokusanhlamvu we-austenite uyakhula, futhi ingxenyenamba yevolumu ye-static recrystallization iyancipha, kodwa ushintsho alubalulekile; ngaphansi kuka-1250 ℃, njengoba izinga lokushisa le-austenitizing likhuphuka, ingxenyenamba yevolumu ye-static recrystallization ayinciphi kakhulu, kodwa Ngaphezulu kuka-1250 ℃, ukwanda kwezinga lokushisa le-austenitizing ngokusobala kunciphisa ingxenyena yevolumu ye-recrystallization emile. Ngokusebenzisa indlela yokulinganisa kanye nezikwele ezincane, imodeli yezibalo yobudlelwane phakathi kwengxenye yevolumu ye-static recrystallization kanye nemingcele yenqubo yokuguquguquka ehlukene iyatholakala; imodeli yezibalo yesilinganiso esisalelayo esikhona iyabuyekezwa, futhi kutholwe imodeli yezibalo yesilinganiso sokuvivinya esisele esiqukethe ithemu yesilinganiso sobunzima. Ukulingana okuhle.