Nd:YAG 레이저 충격 피닝에 의한 프레스 금형재료의 표면경화 특성

Characteristics of Surface Strengthening of Press Die Materials by Nd:YAG Laser Shock Peening

The development of the surface treatment technology is extremely critical with the recent trend of the various new materials such as composites, alloys with complicated structures. Wear resistance is the most important aspect in die and mold industry which enables the mass production with proper quality control. Laser shock peening is a new technology of the surface treatment which is supposed to increase the durability and have better quality of the parts using such kind of tooling material, various kinds of research of the surface hardening through many kinds of heat resources is being done and practically applied. In this study, it is experimentally observed by the status of the surface morphology, tensile strength, the hardness distribution of the base metal and wear condition by the surface hardness pattern by the laser beam based on the process parameters of Nd:YAG laser shock peening by using press die materials. Through this research, the characteristics of surface hardened zone for high strength of the thin metal by laser beam irradiation is done. The effect on the wear resistance and improvement of the mechanical properties is identified in the application to the materials for the press die.