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CO₂ 레이저 빔 조사에 의한 프레스 금형재료의 표면경화 특성
양세영(Se-Young Yang),최성대(Seong-Dae Choi),최명수(Myeong-Soo Choi),전재목(Jae-Mok Jun) 한국기계가공학회 2011 한국기계가공학회지 Vol.10 No.1
Recently, the technology of surface treatment is being more important which affects the material cost reduction and substitution to the expensive material. The material used for the mechanical processing should have not only high intensity, but also strength toughness, wear resistance and corrosion resistance. In order 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, the characteristics of hardening surface zone for high strength of the press die material through laser beam irradiation are researched. 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 CO₂ laser by using SM45C and STD11 used for press tool. Through this research, the characteristics of surface hardened zone for high strength of the thin metal by laser beam irradiation is done.