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상용자동차의 Cam Shaft 재료인 SM53C의 표면경화특성 및 피로균열진전 거동해석
전현배(Hyun-Bae Jeon),박원조(Won-Jo Park) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.5
Recently, with the high performance and efficiency of machine, there have been required the multi-functions in various machine parts, such as the heat resistance, the abrasion resistance and the stress resistance as 'well as the strength. Fatigue crack growth tests were carried out to investigate the fatigue characteristics of high carbon steel (SM53C) experienced by high-frequency induction treatment. The influence of high-frequency induction treatment on fatigue limit was experimentally examined with the specialfocus on the variation of surface microstructure and the fatigue crack initiation and propagation through fractography. Also, the shape of hardening depth, hardened structure, hardness, and fatigue-fracture characteristics of SM53C composed by carbon steel are also investigated.
고주파유도가열을 적용한 캠 샤프트 소재의 피로균열진전거동 해석
전현배(Hyun-Bae Jeon),이현준(Hyun-Jun Lee),Jiang Jun,허선철(SunChul Huh),박원조(Won-Jo Park) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.10
Recently, with the high performance and efficiency of machine, there have been required the multi-functions in various machine parts, such as the heat resistance, the abrasion resistance and the stress resistance as well as the strength. Fatigue crack growth tests were carried out to investigate the fatigue characteristics of high carbon steel (SM53C) experienced by high-frequency induction treatment. The influence of high-frequency induction treatment on fatigue limit was experimentally examined with the special focus on the variation of surface microstructure and the fatigue crack initiation and propagation through fractography. Also, the shape of hardening depth, hardened structure, hardness, and fatigue-fracture characteristics of SM53C composed by carbon steel are also investigated.
고주파열처리에 의한 0.53% 탄소강의 피로균열진전 거동
전현배(Hyun-Bae Jeon),이현준(Hyun-Jun Lee),허선철(Sun-Chul Huh),허정원(Chung-Weon Hur),박원조(Won-Jo Park) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.5
Recently, with the high performance and efficiency of machine, there have been required the multi-functions in various machine parts, such as the heat resistance, the abrasion resistance and the stress resistance as well as the strength. Fatigue crack growth tests were carried out to investigate the fatigue characteristics of high carbon steel (SM53C) experienced by high-frequency induction treatment. The influence of high-frequency induction treatment on fatigue limit was experimentally examined with the specialfocus on the variation of surface microstructure and the fatigue crack initiation and propagation through fractography. Also, the shape of hardening depth, hardened structure, hardness, and fatigue-fracture characteristics of SM53C composed by carbon steel are also investigated.
알루미늄 합금의 피로강도향상과 피로특성에 미치는 쇼트피닝 영향
전현배(Hyun-Bae Jeon),임만배(Man-Bae Lim),박원조(Won-Jo Park) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.5
The purpose of this study is to investigate the effect of shot peening on the fatigue strength and fatigue life of two kinds of aluminum alloys. The fatigue strength behavior of aluminum alloys were estimated by the stress ratio and shot velocities. The fatigue life and strength increased with increasing the test shot velocity. However, at the shot velocity range between 50㎧ and 70㎧, the compressive residual stress phenomena were observed in test conditions of different shot velocity. The optimal shot velocity is acquired by considering the peak values of the compressive residual stress, dislocations, brittle striation, slip, and fisheye on the fracture surface of test specimen. It was observed from the SEM observation on the deformed specimen that the brittle striation, fisheye were showed in the intergranular fracture structure boundaries at the this velocities. Therefore, fatigue strength and fatigue life would be considered that shot velocity has close relationship with the compressive residual stress.
고주파 경화 열처리한 SM53C강의 파괴특성에 관한 연구
전현배(Hyun-Bae Jeon),송태훈(Tae-Hoon Song),허선철(Sun-Chul Huh),박원조(Won-Jo Park) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.10
Cam shaft which is part of automobile engine is essential part when traveling and significant to fuel injection timing. And also, stiffness and efficiency are component of automobile sash which have a durability of the engine. High hardness and durability are necessary, because engine output is effect by cam shaft directly. So, High-Frequency Induction Hardening is very important. Therefore, in this study here are compared surface hardness characteristic and hardening depth of the SM53C used in the cam shaft. In order to estimate the shape of hardening depth, we investigated hardened structure, hardness, hardening and fracture characteristic of SM53C composed by carbon steel.