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2. 发明申请

US20120009435A1 BENT METAL MEMBER AND A METHOD FOR ITS MANUFACTURE 有权
标题翻译：弯曲金属构件及其制造方法
公开(公告)号：US20120009435A1
公开(公告)日：2012-01-12
申请号：US13185575
申请日：2011-07-19
申请人： Toyomitsu NAKAMURA , Atsushi TOMIZAWA , Naoaki SHIMADA , Nobusato KOJIMA , Kazuya ISHII , Kazuhito IMAI , Tamotsu TOKI
发明人： Toyomitsu NAKAMURA , Atsushi TOMIZAWA , Naoaki SHIMADA , Nobusato KOJIMA , Kazuya ISHII , Kazuhito IMAI , Tamotsu TOKI
IPC分类号： B22F5/00 , B21D37/16
CPC分类号： B22F5/00 , B21D7/08 , B21D7/162 , B32B1/08 , C21D8/105 , C21D9/08 , C23C2/26 , C23C2/28 , C23C26/00 , Y10T428/12292 , Y10T428/1241
摘要： A bent metal member which is obtained by bending accompanied by heat treatment of a zinc-based coated metal material and which is suitable for use in components of automobiles due to having a high strength and excellent post-painting corrosion resistance is manufactured. The outer surface of a tubular metal material having on its surface a Zn—Fe alloy coating layer with a coating weight of 30-90 g/m2 per side, an Fe content of 8-20%, and a surface roughness Ra of at most 0.8 μm is supported at two locations spaced in the axial direction of the metal material so that the material can move in its axial direction, the metal material is heated between the two locations to a temperature range of at least the Ac3 point at a heating speed such that the rate of temperature increase is at least 3.0×102° C. per second while feeding the metal material in its axial direction, holding so that the length of time for which the surface of the metal material is at 8.0×102° C. or higher is at most 2 seconds, then rapid cooling is carried out, and the position of the downstream of the two locations in the feed direction of the metal material is two-dimensionally or three-dimensionally varied to impart a bending moment to the heated portion of the metal material. A bent metal member having a Zn-based layer which contains an η phase and which has a coating weight of 30-90 g/m2 per side, an Fe content of 8-35%, 35%, and a surface roughness Ra of at most 2.0 μm can be manufactured.
摘要翻译：制造弯曲金属构件，其通过弯曲伴随着锌基涂覆金属材料的热处理而获得，并且由于具有高强度和优异的后涂耐蚀性而适用于汽车的部件。管状金属材料的外表面在其表面上具有涂层重量为每面30-90g / m 2，Fe含量为8-20％，表面粗糙度Ra为最多的Zn-Fe合金涂层在金属材料的轴向隔开的两个位置处支撑0.8μm，使得材料可以在其轴向方向上移动，金属材料在两个位置之间被加热到加热速度至少为Ac3点的温度范围使得在将金属材料沿其轴向方向进给的同时，温度上升速率为每秒至少3.0×102℃，保持金属材料的表面的时间长度为8.0×102℃ 等于或高于2秒，则进行快速冷却，并且金属材料的进给方向上的两个位置的下游位置被二维地或三维地改变以赋予加热部分的金属材料。具有Zn基层的弯曲金属构件，其含有＆lt; 相，并且每面涂层重量为30-90g / m 2，Fe含量为8-35％，35％，表面粗糙度Ra为2.0μm以下。

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