Abstract

Hardened layer and compressive residual stress created by carburized treatment effect on bending strength of gear massively. Also, shot peening treatment improves the strength of carburized gear as it does the hardness and residual stress of surface layer. In these days shot peening techniques are welcomed as one of physical improvement ways around the surface of materials. It is used widely because qualitative analysis of shot peening has become possible and surface treatment can be done with very little costs comparaed to other surface improvement methods. Therefore this study investigates the effect of shot peening in surface shape and bending fatigue strength after doing many kinds of shot peening treatments, then doing fatigue test and also explained characteristics of shot peening gear.

Keywords

• Shot Peening Gear;
• Hardened Layer;
• Compressive Residual Stress;
• Shot Peening Treatment;
• Surface Shape;
• Bending Fatigue Strength;
• Fatigue Test

• 쇼트피닝기어;
• 경화층;
• 압축잔류응력;
• 쇼트피닝처리;
• 표면형상;
• 굽힘피로강도;
• 피로시험;