ʻO ke kila crankshaft C38N2 he ʻano hou o ka microalloyed non-quenched a me ke kila wela, kahi e pani ai i ke kila kinai ʻia a me ke kila e hana ai i nā crankshaft engine Renault. ʻO nā hemahema o ka lauoho lauoho he mau hemahema maʻamau i ke ola o nā crankshafts, i kumu nui ʻia e nā defects metallurgical e like me nā pores a me ka looseness i loko o ka ingot kumu e ʻoki ʻia mai ke kumu a hiki i ka ʻili i ka wā o ke kaʻina hana make. ʻO ka hoʻomaikaʻi ʻana i ka maikaʻi o ke kumu o ka mea crankshaft ua lilo i pahuhopu koʻikoʻi i ke kaʻina ʻōwili. Ma ka hōʻemi ʻana i ka palupalu o ka pass i ka wā o ka ʻōwili ʻana, a me ka hoʻolaha ʻana i ka deformation o ke kumu he ala maikaʻi ia no ka wehe ʻana a me ka emi ʻana o ke kumu o ka hale hoʻoheheʻe welded.

Ua aʻo nā kānaka ʻepekema mai ke Kulanui o ʻEpekema a me ʻenehana ʻo Beijing i nā hopena o nā kūlana austenitizing, ka wela deformation, ka nui o ka deformation, ka nui o ka deformation, a me ka hala ʻana o ka wā ma luna o ke kila C38N2 ʻaʻole i hoʻopaʻa ʻia a hoʻoheheʻe ʻia o nā crankshafts ma o nā hoʻokolohua thermal simulation, optical metallography a me ka hoʻouna. ka nānā ʻana i ka microscopy electron. ʻO ke kānāwai hoʻoikaika o ka haʻihaʻi leo recrystallization static a me ke koena koʻikoʻi ma waena o nā hala.

Hōʻike nā hopena hoʻokolohua me ka piʻi ʻana o ka mahana deformation, ka nui o ka deformation, ka nui o ka deformation a i ʻole ka manawa waena ma waena o nā hala, e piʻi mālie ana ka hapa leo o ka recrystallization static, a ke emi nei ke koena o ke koina o nā hala. ; Piʻi ka nui o ka palaoa austenite mua, a ke emi nei ka hapa nui o ka recrystallization static, akā ʻaʻole nui ka loli; Ma lalo o 1250 ℃, me ka piʻi ʻana o ka mahana austenitizing, ʻaʻole e emi nui ka hapa nui o ka recrystallization static, akā ma luna o 1250 ℃, ʻo ka piʻi ʻana o ka austenitizing wela e hōʻemi i ka hapa nui o ka recrystallization static. Ma o ka laina laina a me nā ʻano huinahā liʻiliʻi, loaʻa ke kumu hoʻohālike makemakika o ka pilina ma waena o ka hakina leo recrystallization static a me nā ʻāpana kaʻina hana deformation ʻokoʻa; hoʻoponopono hou ʻia ke kumu hoʻohālike makemakika strain rate koena, a loaʻa ke kumu hoʻohālike makemakika strain rate koena i loaʻa ka huahelu strain rate. Kūpono maikaʻi.