Dissimilar Friction Welding of Hydraulic Valve Spool Steel Bar-to-Bar and The Fatigue Evaluation by AE

밸브스풀용 강재의 봉대봉 이종재 마찰용접의 최적화와 피로강도 특성 및 AE평가

This paper deals with the development of fundamental design and manufacturing technique of hydraulic valve spool by optimizing of friction welding, the development of in-process real-time weld quality evaluation technique by acoustic emission and the evaluation of the mechanical properties and the fatigue life about the bar-to-bar dissimilar friction welded hydraulic valve spool steels.