STAINLESS STEEL MAGNET

To provide a stainless steel magnet that combines a structural function, corrosion resistance, and a magnet function by optimizing the chemical composition of a stainless steel used for a medical device and a member, the degree of cold working of the member, the working temperature, and the working method and uncovering unknown problems concerning devising shapes and magnetization methods for components including magnetic functions and to provide a manufacturing method for the same.SOLUTION: The stainless steel magnet is made by cold working Cr-Ni austenitic stainless steel to produce a martensitic content of 50% or more, so that the direction of magnetization matches the direction of the fiber structure during cold working. Thereby, the stainless steel magnet is made to have a saturation magnetization of 8000 to 16000 G, a coercive force of 50 Oe to 300 Oe, an anisotropic magnetic field of 50 to 2000 Oe, and a residual magnetization of 5000 to 8000 G. The stainless steel manufacturing method includes heat treatment by applying tension in the direction of the fiber structure.SELECTED DRAWING: None 【課題】医療機器や部材に使用される、ステンレス鋼の化学組成、部材の冷間加工度、加工温度や加工方法の適切化、さらに磁石機能を備える部品の形状工夫及び着磁方法の工夫に関する未知の課題を解明し、構造機能、耐腐食性及び磁石機能を兼ね併せ持つステンレス磁石並びにその創造方法を提供する。【解決手段】ステンレス磁石は、Ｃｒ－Ｎｉ系のオーステナイト系ステンレス鋼を冷間加工して５０％以上のマルテンサイト量を生じせしめ、冷間加工時の繊維組織の方向と着磁方向を一致させることにより、飽和磁化８０００から１６０００Ｇ、５０Ｏｅ～３００Ｏｅの保磁力、異方性磁界５０から２０００Ｏｅ、残留磁気５０００から８０００Ｇを持つ。ステンレス製造方法は、繊維組織の方向に張力を負荷して熱処理を行うことを含む。【選択図】なし