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http://dx.doi.org/10.14775/ksmpe.2017.16.6.087

Characteristics of Mechanical Properties and Micro Structure according to High-Frequency Induction Heating Conditions in Roll Forming Process of a Sill Side Part  

Kim, Kun-Young (Graduate school of convergence science, Pusan National University)
Choy, Lee-Jon (Graduate school of convergence science, Pusan National University)
Shin, Hyun-Il (New Technology department, Sewon Corp, Ltd)
Cho, Jun-Haeng (New Technology department, Sewon Corp, Ltd)
Lee, Chang-Hoon (New Technology department, Sewon Corp, Ltd)
Kang, Myung Chang (Graduate school of convergence science, Pusan National University)
Publication Information
Journal of the Korean Society of Manufacturing Process Engineers / v.16, no.6, 2017 , pp. 87-94 More about this Journal
Abstract
Hot stamping processes are possible for tensile strength 1.4 GPa but the strength reduction is appeared from the cooling performance unbalance. And the strength of roll forming process is below than that of hot stamping process owing to using the steel which is lower strength of boron steel. In this study, We provide roll forming process asssisted high-frequency induction heating to solve the problem of conventional one. The experiments were carried out at under various sill side part conditions: high-frequency induction heating conditions of 15, 18, 21, 24, 27 and 30 kW. The high-frequency induction heating temperature was checked with Infrared camera and the sill side parts of mechanical properties and microstructure were measured. The heating temperature of high frequency induction was measured to max $850^{\circ}C$ under the coil power of 30 kW. The tensile strength was 1.5 GPa and hardness was 490 Hv. The martensite structure was discovered under coil power of 30 kW. The weight of steel material sill side having thickness 1.5 mm and the boron steel sill side having thickness 1.2 mm were compared to weight effect. The boron steel sill side reduced 11.5% compared to steel. Consequently, manufacturing process of 1.5 giga-grade's sill side part was successfully realized by the roll forming assisted high-frequency induction heating methods.
Keywords
Sill Side; High Frequency Induction Heating; Roll Forming; Boron Steel; GIGA-Grade Steel;
Citations & Related Records
Times Cited By KSCI : 9  (Citation Analysis)
연도 인용수 순위
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