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박판 스프링용 탄소공구강대(SK5M)의 기계적 성질에 미치는 뜨임 온도의 영향
원시태(S. T. Won),심경섭(K. S. Sim),임철록(C. R. Lim) 한국정밀공학회 2006 한국정밀공학회 학술발표대회 논문집 Vol.2006 No.5월
This study examined the effects of the tempering temperatures(360-420℃) on the mechanical properties of the carbon tool steel (SK4M) for flat spring. Hardness test, tensile test and fatigue test were performed at room temperature(20℃). The tensile strength and yield strength of 390℃ and 420℃ tempered SK5M were 0.93-0.97 times and 0.81-0.87 times those of 360℃ tempered SK5M, respectively. The fatigue limit of 360-420℃ tempered SK5M were 35-40% of tensile strength of 360-420℃ tempered SK5M, respectively.
박판 스프링용 탄소공구강재(SK4M)의 시험온도에 따른 기계적 특성평가에 관한 연구
원시태,임철록 서울産業大學校 2005 논문집 Vol.54 No.1
This study examined the effects of the testing temperature on the mechanical properties of the carbon tool steel (SK4M) for flat spring. Hardness test and fatigue test were performed at room temperature (20°C). Tensile test and creep test were performed at temperature range 20°C~160°C. The micro-vickers hardness values of SK4M was Hv = 584. The Elastic modulus, tensile strength and yield strength of SK4M at 160 °C test temperature were decreased 0.92 time, 0.97 time and 0.82 time those of SK4M at 20 °C test temperature, respectively. The maximum creep strain for lOOhr at creep temperature (80°C~160°C) and creep stress (37.4Kgf/mm²~93.6Kgf/mm²) was 0.572%. The fatigue limit of SK4M was 94Kgf/mm².
박판 스프링용 스테인레스강재(STS301CSP-3/4H, STS301CSP-H)의 시험온도에 따른 기계적 특성평가에 관한 연구
원시태,임철록 서울産業大學校 2005 논문집 Vol.54 No.1
This study examined the effects of the testing temperature on the mechanical properties of the stainless steels (STS301CSP-3/4H and STS301CSP-H) for flat spring. Hardness test and fatigue test were performed at room temperature (20°C). Tensile test and creep test were performed at temperature range 20°C~200°C. The micro-vickers hardness values of STS301CSP-3/4H and STS301CSP-H were HV = 443 and HV = 488, respectively. The Elastic modulus, tensile strength, yield strength and strain of these materials were decreased with increasing testing temperature, respectively. The maximum creep strain for lOOhr at creep temperature (100°C~200°C) and creep stress (Tensile strength*50%) of these materials were 0.53%-0.58%. The fatigue limit of STS301CSP-3/4H and STS301CSP-H were 64.5Kgf/mm² and 67.4Kgf/mm², respectively.