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2. 发明公开

EP1172454A1 Formed member made of steel sheet and method for producing same 有权
标题翻译： Formteil hergestellt aus Sahlblech und Verfahren zu seiner Herstellung
公开(公告)号：EP1172454A1
公开(公告)日：2002-01-16
申请号：EP01114868.1
申请日：2001-06-29
申请人： Mazda Motor Corporation
发明人： Hanakawa, Katsunori , Ishida, Kyoso , Fukahori, Mitsugi
IPC分类号： C23C8/26 , C21D8/04
CPC分类号： C21D9/0068 , B62D25/02 , B62D25/04 , B62D29/007 , C21D8/0457 , C23C8/04 , C23C8/26
摘要： A method for producing a formed member (10, 20, 30, 50, 50', 60, 70, 80, FR, F4) made of a steel sheet according to the present invention is characterized by preparing a steel sheet material having tensile strength of 500 MPa or less and containing a nitriding element; forming a formed member (10', 20, 30', 50, 50', 60, 70, 80, FR, F3) having a predetermined shape by performing a plastic forming on the steel sheet material; and performing a nitriding treatment on the formed member so that an average hardness in the sheet thickness direction of the resultant steel sheet member is Hv 300 or more by Vickers hardness, and further characterized in that the difference in hardness between the surface part and the inside center part in the thickness direction of the steel sheet member of the formed member is Hv 200 or less by Vickers hardness, thereby it is possible to reliably obtain a formed member having a sufficiently high strength after a nitriding treatment while ensuring a plastic formability of a steel sheet in obtaining a formed member made of a steel sheet member of high strength by performing a nitriding treatment after subjecting a steel sheet material to a plastic forming.
摘要翻译：根据本发明的由钢板制成的成形件（10,20,30,50,50'，60,70,80，FR，F4）的制造方法的特征在于制备具有拉伸强度的钢板材 500MPa以下，含有氮化元素; 通过在钢板材上进行塑性成形来形成具有预定形状的成形件（10'，20,30'，50,50'，60,70,80，FR，F3）对所形成的部件进行渗氮处理，使得所得钢板部件的板厚方向的平均硬度为维氏硬度为Hv以上，特征在于，表面部与内侧的硬度差成形构件的钢板构件的厚度方向的中心部分的维氏硬度为Hv以下200以下，能够可靠地获得氮化处理后的强度足够高的成形构件，同时确保塑性成形性钢板通过在对钢板材进行塑性成型后进行氮化处理而获得由高强度钢板构件制成的成形构件。

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