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고온성형 위한 고강도보론강의 기계적 특성 및 마이크로구조 연구
이종신(Lee Jongshin),채명수(Chae Myoungsu),박춘달(Park chundal),김영석(Kim youngsuk) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.5
The use of high strength steels are gradually increasing to reduce the weight of automobile to improve the environmental problems and collision safety. To encounter the traditional disadvantages of high strength steels like as a poor formability and high springback, hot press forming has been developed. By this method, the strength of steel sheet is increased about three times of original one through die quenching process. In order to the design of hot press forming tools by using numerical simulation, the knowledge of mechanical and microstructural characteristics are required. This study show the mechanical and microstructural characteristics of a high strength boron-alloyed steel according to the various quenching conditions.
김근영(Kunyoung Kim),장순근(Soongeun Jang),정현섭(Hyunsup Jung),오강세(KangSae Oh),윤재정(JeaJung Yun),박춘달(Chundal Park) 한국자동차공학회 2011 한국자동차공학회 지부 학술대회 논문집 Vol.2011 No.4
Vehicle Sill side made of a thin sheet of steel has been constructed using Roll forming technology with the aim of ensuring occupant safety in the event of a side collision. This technology has been used to increase the strength of the vehicle body parts and to reduce the weight of the door impact beam as well as the number of work processes. However, Roll forming process is very difficult because of the inherent complexity of the process. For this reason, the FEM(Finite Element Method) is one of the computer analysis. it is used for Roll forming design. This study, Mechanical tests were performed to determine the material properties of the sill side specimen and the results of the tests were used as input data in stamping and structural simulation in order to obtain the optimal design of sill side.
김근영(Kunyoung Kim),장순근(Soongeun Jang),정현섭(Hyunsup Jung),오강세(KangSae Oh),윤재정(JeaJung Yun),박춘달(Chundal Park) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.4
Vehicle Sill side made of a thin sheet of steel has been constructed using Roll forming technology with the aim of ensuring occupant safety in the event of a side collision. This technology has been used to increase the strength of the vehicle body parts and to reduce the weight of the door impact beam as well as the number of work processes. However, Roll forming process is very difficult because of the inherent complexity of the process. For this reason, the FEM(Finite Element Method) is one of the computer analysis. it is used for Roll forming design. This study, Mechanical tests were performed to determine the material properties of the sill side specimen and the results of the tests were used as input data in stamping and structural simulation in order to obtain the optimal design of sill side.