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51. 发明授权

US5288343A Stainless steel sheet for exterior building constituent 失效
标题翻译：外部建筑构件不锈钢板
公开(公告)号：US5288343A
公开(公告)日：1994-02-22
申请号：US982021
申请日：1992-11-24
申请人： Yoshihiro Yazawa , Yuji Sone , Keiichi Yoshioka , Noboru Kinoshita , Masayuki Hino
发明人： Yoshihiro Yazawa , Yuji Sone , Keiichi Yoshioka , Noboru Kinoshita , Masayuki Hino
IPC分类号： C21D8/02 , C22C38/18
CPC分类号： C21D8/0205
摘要： A sheet metal made from a ferritic stainless steel alloy which has an improved corrosion resistivity and is suitable for use in manufacturing exterior building material, in particular, roofing material, by means of forming process such as roll-forming, without formation of pocket wave. The steel alloy comprises 10-32 wt % of Cr and 0.005-0.1 wt %, in total, of C and N, the balance being Fe and unavoidable impurities. The sheet metal has been processed to present a mechanical property that, when tested in a tensile test conducted for a test piece sampled in the widthwise direction of cold-rolling and measured at the elastic limit reached in the test, a strain ratio is equal to or greater than 2.5.The method of making the sheet metal comprises the steps of: cold rolling a steel slab into a sheet metal, subjecting the thus obtained sheet metal to final annealing, subjecting the sheet metal to skin-pass rolling, and, subjecting the resulting sheet metal to aging process at a temperature of 200.degree.-550.degree. C. for a time period of more than 5 seconds and less than 48 hours.
摘要翻译：一种由铁素体不锈钢合金制成的金属片，其具有改善的耐腐蚀性，并且通过诸如滚压成型的成形方法适用于制造外部建筑材料，特别是屋顶材料，而不形成袋形波。钢合金含有10-32重量％的Cr和0.005-0.1重量％的C和N，余量为Fe和不可避免的杂质。已经对金属板进行了加工，表现出机械性能，当在对冷轧宽度方向取样并在试验中达到的弹性极限下测定的试件进行拉伸试验时，应变率等于或大于2.5。制造金属板的方法包括以下步骤：将钢坯冷轧成金属板，对所得到的金属板进行最终退火，对金属板进行表面光轧，对所得的金属板进行在200度-550摄氏度的温度下进行老化过程，持续时间超过5秒且小于48小时。

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