Improvement of Heat Treatment Process for Automobile Engine Crankshaft
The quenching and tempering process for 42CrMo steel was improved.Adding a intermediate frequency induction quenching process,the defect in original surface treatment process was overcome,and the hardening layer of work corner was effectively increased,a certain hardness gradient in crankshaft was obtained,so as to ensure the excellent comprehensive mechanical properties of crankshaft after tempering.