Development of cold forging process for OP shaft and the improvement of forgeability of SNCM steel

OP shaft용 냉간 단조 성형 공정 개발 및 SNCM강의 단조성 향상에 관한 연구

This study presents the enhancement of forgeability of SNCM522H materials. Target parts are output shaft(OP shaft) used as components of power train for automobiles. To carry out cold forging process of OP shaft by 1 pass instead of existing 2 pass process, studies in terms of process design and heat treatment were performed. To introduce the new process, Finite element Method are accomplished, and to verify the validity of proposed heat treatment cycle, several experiments(Hardness test, Observation of optical microstructures, tensile test) are carried out.