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100Kfg/㎟급 선조질강의 합금원소에 따른 유도가열효과에 관한 연구
박지태(J. T. Park),안순태(S. T. Ahn),권대호(D. H. Kwon),서주현(J. H. Seo),강남현(N. H. Kang),윤덕재(D. J. Yoon) 한국소성가공학회 2009 한국소성가공학회 학술대회 논문집 Vol.2009 No.5
This study is for investigating the effect of induction heating with various alloy elements to manufacture the pre-heat treated steels of 100Kfg/㎟ for cold heading. For four kinds of steels, the condition of induction heating (especially, induction tempering) were observed, and their microstructure and tensile and compressive properties were investigated. The middle carbon steel and the low carbon Cr-Mo steel are needed the higher Grange-Baughman tempering parameter than that of the low carbon Cr steel to obtain 100Kfg/㎟ tensile strength. For accomplishing the pre-heat treated steel of 100Kfg/㎟ tensile strength having advanced cold heading, It is needed that the pre-heat treated steel is manufactured by induction quenching and tempering with the low carbon alloy steel to have the high ratio of ferrite and the fine globular cementite simultaneously.