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41. 发明申请

US20100112377A1 GALVANIZED HIGH STRENGTH STEEL SHEET AND METHOD FOR PRODUCING THEREOF 有权
标题翻译：优质高强度钢板及其生产方法
公开(公告)号：US20100112377A1
公开(公告)日：2010-05-06
申请号：US12594018
申请日：2008-03-27
申请人： Shinjiro Kaneko , Hiroshi Matsuda , Yoshiyasu Kawasaki , Tatsuya Nakagaito , Yoshitsugu Suzuki , Yusuke Fushiwaki , Takashi Kawano , Saiji Matsuoka
发明人： Shinjiro Kaneko , Hiroshi Matsuda , Yoshiyasu Kawasaki , Tatsuya Nakagaito , Yoshitsugu Suzuki , Yusuke Fushiwaki , Takashi Kawano , Saiji Matsuoka
IPC分类号： B32B15/01
CPC分类号： C23C2/06 , B32B15/013 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/06 , C23C2/28 , Y10T428/12799 , Y10T428/12951 , Y10T428/12972
摘要： A high-strength galvanized steel sheet is provided which has a tensile strength of a level of about 590 MPa and superior formability, including a coating with good appearance. The galvanized steel sheet includes a base steel and a galvanized coating layer formed over the surface of the base steel. The galvanized steel sheet has a chemical composition containing 0.005% to 0.12% of C, 0.7% to 2.7% of Si, 0.5% to 2.8% of Mn, 0.1% or less of P, 0.07% or less of S, 1.0% or less of Al, 0.008% or less of N, and the balance being Fe and inevitable impurities on a mass basis, and a microstructure constituted of at least 90% of ferrite and 2% to 10% of martensite on an area basis. The ferrite has a Vickers hardness of 120 or more on average, and an inclusion is precipitated from the grain boundary with a length of 50% or less relative to the entire length of the grain boundary in the surface layer of the base steel with a depth of 3 μm from the interface between the coating layer and the base steel.
摘要翻译：提供了具有约590MPa的拉伸强度和优异的成形性的高强度镀锌钢板，包括具有良好外观的涂层。镀锌钢板包括基体钢和形成在基体钢表面上的镀锌层。镀锌钢板具有C：0.005〜0.12％，Si：0.7〜2.7％，Mn：0.5〜2.8％，P：0.1％以下，S：0.07％以下，1.0％以下少量的Al，0.008％以下的N，余量为Fe和不可避免的杂质，基于面积的至少90％的铁素体和2〜10％的马氏体构成。铁素体的维氏硬度平均为120以上，相对于基体钢的表层的晶界的全长为50％以下，从晶界析出的夹杂物的深度为深度距涂层和基体钢之间的界面为3微米。

42. 发明授权

US06425963B1 High tensile strength hot-rolled steel sheet 有权
标题翻译：高抗拉强度热轧钢板
公开(公告)号：US06425963B1
公开(公告)日：2002-07-30
申请号：US09490267
申请日：2000-01-24
申请人： Shinjiro Kaneko , Tetsuo Shimizu , Osamu Furukimi
发明人： Shinjiro Kaneko , Tetsuo Shimizu , Osamu Furukimi
IPC分类号： C22C3800
CPC分类号： C21D8/0226 , C22C38/001 , C22C38/04
摘要： High tensile strength hot-rolled steel sheet suitable for use in interior materials for automobiles and a method for producing the same, in which bake hardenability, fatigue resistance, crash resistance, and resistance to room temperature aging are improved, containing 0.01% to 0.12% by weight of carbon, 2.0% by weight or less of silicon, 0.01% to 3.0% by weight of manganese, 0.2% by weight or less of phosphorus, 0.001% to 0.1% by weight of aluminum, and 0.003% to 0.02% by weight of nitrogen and subjected to hot rolling and cooling at a cooling rate of 50° C./s or more within 0.5 second after hot rolling; the hot-rolled steel sheet has a structure including a ferrite having an average grain diameter of 8 &mgr;m or less as a primary phase, the amount of solute Nitrogen ranges from 0.003% to 0.01%, and the ratio, Ngb/Ng, of an average concentration Ngb of nitrogen dissolved in the ferrite grain boundary to an average concentration Ng of nitrogen dissolved in ferrite grains ranges from 100 to 10,000.
摘要翻译：适用于汽车内饰材料的高强度热轧钢板及其制造方法，其中烘烤淬透性，耐疲劳性，抗冲击性和耐室温老化性均得到改善，含有0.01％至0.12％的碳，2.0重量％以下的硅，0.01〜3.0重量％的锰，0.2重量％以下的磷，0.001〜0.1重量％的铝，0.003〜0.02重量％并在热轧后0.5秒内以50℃/ s以上的冷却速度进行热轧冷却; 热轧钢板具有平均粒径为8μm以下的铁素体作为主相的结构，溶质氮的含量为0.003〜0.01％，Ngb / Ng的比例为溶解在铁素体晶界中的氮的平均浓度Ngb与溶解在铁素体晶粒中的氮的平均浓度Ng的关系为100〜10000。

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