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한성경(Seongkyung Han),김성주(Sungju Kim),서용기(Younggi Seo),유은지(Eunji Yu),김종렬(Jongryoul Kim) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
Automobile industries have been requesting increase of the strength in steel to reduce car weight and to improve and car crash worthiness for vehicles. Especially, application of AHSS(Advanced High Strength Steel) and UHSS(Ultra High Strength Steel) have been increasing for car remarkably in recent years. Although, Cold rolled UHSS mainly used to car body, we tried to develop UHSS using hot rolled process to reduce the cost and the manufacturing process of hot rolled sheet for substitude cold rolled UHSS. In this study, mechanical properties and microstructure characteristics of the developed 1.2㎬ grade hot rolled UHSS was analyzed.