公开(公告)号：US20090139615A1

公开(公告)日：2009-06-04

申请号：US12324472

申请日：2008-11-26

申请人： Michihiko Ayada ,  Yoshiki Ono ,  Fumio Takahashi ,  Hironori Ebashi ,  Sakae Kikuchi

发明人： Michihiko Ayada ,  Yoshiki Ono ,  Fumio Takahashi ,  Hironori Ebashi ,  Sakae Kikuchi

IPC分类号： C21D1/10 ,  C22C38/00

CPC分类号： C21D9/02

摘要： The present invention provides a leaf spring material superior in mechanical characteristics and a manufacturing method of the leaf spring material capable of reliably achieving the same, utilizing induction hardening. The manufacturing method of the leaf spring material comprises the steps of imparting tensile stress on a first surface along the longitudinal direction of the first surface and compressive stress on a second surface along the longitudinal direction of the second surface of a substantially strip-shaped steel plate, and subjecting the first surface to induction hardening. With this induction hardening, an induction-hardened structure having a higher average hardness than that of a parent material structure in the vicinity of the second surface and comprising martensite and finely and evenly dispersed austenite is imparted on a surface layer in the vicinity of the first surface.

摘要翻译： 本发明提供了一种机械特性优异的板簧材料和利用感应淬火能够可靠地实现的板簧材料的制造方法。 板簧材料的制造方法包括以下步骤：沿着第一表面的纵向方向在第一表面上施加拉伸应力，并且沿着基本条形钢板的第二表面的纵向在第二表面上施加压缩应力 并对第一表面进行感应淬火。 通过这种感应淬火，在第二表面附近具有比母体材料结构高的包含马氏体并且均匀分散的奥氏体的感应硬化结构被赋予在第一 表面。