Intsimbi ye-crankshaft i-C38N2 luhlobo olutsha lwe-microalloyed non-quenched and tempered steel, ethatha indawo yentsimbi ecinyiweyo kunye nobushushu ukwenza i-crankshafts ye-injini ye-Renault. Umphezulu woboya iziphene ziziphene eziqhelekileyo kubomi crankshafts, ikakhulu ezibangelwa iziphene metallurgical ezifana iipores kunye nokukhululeka kwiingot yokuqala ecudiweyo ukusuka embindini ukuya phezulu ngexesha inkqubo yokufa. Ukuphucula umgangatho we-core of the crankshaft material ibe yinjongo ebalulekileyo kwinkqubo yokuqengqeleka. Ngokunciphisa ukuthambisa kokupasa ngexesha lenkqubo yokuqengqeleka, kunye nokukhuthaza ukuguqulwa kwengundoqo yindlela efanelekileyo yokukhulula kunye nokunciphisa i-core of the welded cast structure.

Abaphengululi abavela kwiYunivesithi yeSayensi kunye neTekhnoloji yaseBeijing baye bafunda iziphumo zeemeko ze-austenitizing, ubushushu bokuguqulwa, izinga lokuguqulwa, isixa se-deformation, kunye nexesha lokudlula kwi-C38N2 yentsimbi engacinywanga kunye ne-crunkshafts ye-crankshafts ngokusebenzisa imifuniselo yokulinganisa i-thermal, i-metallography ye-optical kunye nokudluliselwa. Ukuqwalaselwa kwe-electron microscopy. Umthetho wempembelelo ye-static recrystallization volume fraction kunye ne-residual strain rate phakathi kokudlula.

Iziphumo zovavanyo zibonisa ukuba ngokunyuka kweqondo lokushisa lokuguqulwa, izinga lokuguqulwa, inani le-deformation okanye ixesha lekhefu phakathi kokudlula, i-volume fraction ye-static recrystallization iyanda ngokuthe ngcembe, kwaye isantya esiseleyo sokudlula siyancipha. ; Ubungakanani bengqolowa ye-austenite yasekuqaleni iyanda, kwaye i-static recrystallization volume fraction iyancipha, kodwa utshintsho alubalulekanga; ngaphantsi kwe-1250 ℃, ngokunyuka kobushushu be-austenitizing, iqhezu levolumu ye-static recrystallization ayinciphi kakhulu, kodwa Ngaphezulu kwe-1250 ℃, ukunyuka kobushushu be-austenitizing ngokucacileyo kunciphisa iqhezu levolumu ye-static recrystallization. Ngokusebenzisa indlela yokulinganisa kunye nezikwere ezincinci, imodeli yemathematika yobudlelwane phakathi kweqhezu levolumu ye-static recrystallization kunye neeparitha zenkqubo yokuguqulwa ezahlukeneyo zifunyenwe; imodeli yemathematika eyintsalela yobunzima obukhoyo iyahlaziywa, kwaye imodeli yemathematika eshiyekileyo enereyithi yoxinzelelo iyafunyanwa. Ukulingana kakuhle.