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염영진(Youngjin Yum),손진혁(Jinhyug Son),김원혁(Wonhyuck Kim),황정복(Jungbok Hwang),김선웅(Sunung Kim) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.10
An induction hardening technology has been implemented for increasing the strength of press-formed parts locally by high frequency induction heating, thereby eliminating the need for reinforcements. This technique for increasing the tensile strength of sheet steel was practically applied to the front floor cross member and center pillar reinforcement of a passenger car. In order to obtain the behavior of automotive parts, thermal transfer analysis was performed for the hat-shaped specimen under heat treatment process using LS-DYNA. Temperature distribution and deformed shape from the numerical results were in good agreement with the experimental results by high frequency induction heating process. Martensitic transformation was found in the heating zone through microscopic observation which showed higher hardness. Tensile strength and hardness of the hat-shaped boron steel part were found to increase remarkably by high frequency induction heating.