ULTRAHIGH STRENGTH STEEL SHEET AND STRENGTH PART F

专利名称：ULTRAHIGH STRENGTH STEEL SHEET AND

STRENGTH PART FOR AUTOMOBILEUTILIZING THE SAME

发明人：SASAOKA, Hideyuki,ONO,

Masamoto,NAKANISHI, Eizaburou,OKADA,Yoshio,INOUE,

Tadanobu,KIMURA,Yuuji,NAGAI, Kotobu

申请号：EP07740860.7申请日：20070403公开号：EP2022865A1公开日：20090211

摘要：There is provided an ultrahigh strength steel sheet containing 0.10 to 0.40mass% of C, 0.01 to 3.5 mass% of Cr, at least one selected from the group consisting of0.10 to 2.0 mass% of Mo, 0.20 to 1.5 mass% of W, 0.002 to 1.0 mass% of V, 0.002 to 1.0mass% of Ti and 0.005 to 1.0 mass% of Nb, 0.02 mass% or less of P and 0.01 mass% orless of S as impurities and the balance being Fe and unavoidable impurities based on thetotal mass of the steel sheet and having a base structure of lower bainite, a prioraustenite grain size of 30 µm or smaller and a tensile strength of 980 MPa or higher.There is also provided an automotive strength part using the ultrahigh strength steelsheet.

申请人：Nissan Motor Co., Ltd.

地址：2, Takara-cho Kanagawa-ku Yokohama-shi Kanagawa 221-0023 JP

国籍：JP

代理机构：Görz, Ingo

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