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1. 发明授权

US5653899A Method of making a steel pipe by electric resistance heating of opposing edges of a sheet prior to laser welding 失效
标题翻译：在激光焊接之前通过电阻加热片材的相对边缘来制造钢管的方法
公开(公告)号：US5653899A
公开(公告)日：1997-08-05
申请号：US509543
申请日：1995-07-31
申请人： Takayuki Odake , Yoshiichi Ishizawa , Toshihiro Takamura , Yutaka Nagahama
发明人： Takayuki Odake , Yoshiichi Ishizawa , Toshihiro Takamura , Yutaka Nagahama
IPC分类号： B21C37/08 , B21D5/12 , B23K11/06 , B23K26/00 , B23K26/20 , B23K26/26 , C22C38/00 , C22C38/12 , C22C38/28
CPC分类号： C22C38/12 , B21C37/08 , B23K11/062 , B23K26/262 , B23K2203/04
摘要： A method for manufacturing a laser-welded steel pipe, comprising: (a) providing a hot-rolled steel sheet consisting essentially of 0.005 to 0.2 wt. % C, 0.1 to 0.35 wt. % Si, 0.5 to 2 wt. % Mn, 0.01 wt. % or less P, 0.003 wt. % or less S, 0.001 to 0.1 wt. % Nb, 0.001 to 0.006 wt. % Ca and the balance being Fe; (b) continuously forming an open pipe by passing the hot-rolled steel sheet through multi-stage forming rolls, the open pipe having opposed edge faces which confront each other; (c) heating the opposed edge faces of the open pipe by electric resistance heating; and (d) pressure-welding the heated opposed edge faces together by projecting a laser beam in a substantially vertical direction onto an edge joining point of the opposed edge faces and squeezing the opposed edge faces together by passing the open pipe through opposing rolls, to control an upset, the upset being a difference between a coil width (mm) of the open pipe and a circumferential length of the pipe formed after welding (mm).
摘要翻译：一种激光焊接钢管的制造方法，其特征在于，包括：（a）提供主要由0.005〜0.2重量％％C，0.1〜0.35重量％％Si，0.5〜2wt。％Mn，0.01重量％％以下P，0.003重量％％以下S，0.001〜0.1重量％％Nb，0.001〜0.006wt。％Ca，余量为Fe; （b）通过使热轧钢板通过多级成形辊连续地形成开放管，该开口管具有相对的彼此相对的边缘面; （c）通过电阻加热加热开口管的相对边缘面; 和（d）通过将激光束在大致垂直的方向上投射到相对的边缘面的边缘接合点上并将相对的边缘面通过相对的辊将打开的管道挤压在一起而将加热的相对的边缘面加压焊接在一起，控制镦粗，打嗝的线圈宽度（mm）与焊接后形成的管的圆周长度（mm）之间的差异是不利的。

2. 发明授权

US06663725B2 High strength steel sheet and method for manufacturing the same 有权
标题翻译：高强度钢板及其制造方法
公开(公告)号：US06663725B2
公开(公告)日：2003-12-16
申请号：US09827597
申请日：2001-04-05
申请人： Tadashi Inoue , Hiroyasu Kikuchi , Sadanori Imada , Takayuki Odake
发明人： Tadashi Inoue , Hiroyasu Kikuchi , Sadanori Imada , Takayuki Odake
IPC分类号： C22C3840
CPC分类号： C21D8/0226 , C21D8/0236 , C21D8/0263 , C22C38/008 , C22C38/04 , C22C38/12 , C22C38/14 , C22C38/24 , C23C2/02
摘要： The present invention relates to a high strength steel sheet consisting essentially of 0.04 to 0.1% C, 0.5% or less Si, 0.5 to 2% Mn, 0.05% or less P, 0.005% or less 0, 0.005% or less S, by weight, having 10 &mgr;m or less of average ferritic grain size, and 20 mm/mm2 or less of generation frequency A, which generation frequency A is defined as the total length of a banded secondary phase structure observed per 1 mm2 of steel sheet cross section along the rolling direction thereof. The steel sheet is manufactured by, for example, a method comprising the steps of: hot-rolling a continuously cast slab having the composition described above at temperatures of Ar3 transformation point or above directly or after reheating thereof; and cooling the hot-rolled steel sheet within 2 seconds down to the temperatures of from 600 to 750° C. at cooling speeds of from 100 to 2,000° C./sec, followed by coiling the cooled steel sheet at temperatures of from 450 to 650° C. The present invention provides a high strength steel sheet having strengths of 340 MPa or more and having excellent stretch flanging performance, ductility, and shock resistance, providing a sufficient coil shape with good surface properties, even when hot dip zinc-coating is applied.
摘要翻译：高强度钢板本发明涉及一种高强度钢板，其基本上由以下组成的组成：0.04〜0.1％的C，0.5％以下的Si，0.5〜2％的Mn，0.05％以下的P，0.005％以下的S，0.005％以下的S，平均铁素体晶粒尺寸为10mum以下，发电频率A为20mm / mm 2以下的发电频率A定义为每1mm 2观察到的带状二相结构的总长度 >钢板横截面沿其轧制方向。钢板通过例如以下方法制造：包括以下步骤：在Ar3相变点或更高温度下直接或重新加热后，对具有上述组成的连续铸造板坯进行热轧; 并在200〜2000℃/秒的冷却速度下，在2秒钟内将热轧钢板冷却至600〜750℃的温度，然后将冷却后的钢板在450〜 650℃。本发明提供强度为340MPa以上且具有优异的拉伸凸缘性能，延展性和抗冲击性的高强度钢板，提供具有良好表面性能的足够的线圈形状，即使当热浸锌涂层被申请;被应用。

3. 发明申请

US20060065329A1 High strength steel sheet and method for manufacturing the same 审中-公开
标题翻译：高强度钢板及其制造方法
公开(公告)号：US20060065329A1
公开(公告)日：2006-03-30
申请号：US11271428
申请日：2005-11-10
申请人： Tadashi Inoue , Yoichi Motoyashiki , Hiroyasu Kikuchi , Sadanori Imada , Takayuki Odake , Yasunobu Nagataki , Toru Inazumi
发明人： Tadashi Inoue , Yoichi Motoyashiki , Hiroyasu Kikuchi , Sadanori Imada , Takayuki Odake , Yasunobu Nagataki , Toru Inazumi
IPC分类号： C23C2/28
CPC分类号： C21D8/0226 , C21D8/0236 , C21D8/0263 , C22C38/008 , C22C38/04 , C22C38/12 , C22C38/14 , C22C38/24 , C23C2/02
摘要： The present invention relates to a high strength steel sheet consisting essentially of 0.04 to 0.1% C, 0.5% or less Si, 0.5 to 2% Mn, 0.05% or less P, 0.005% or less O, 0.005% or less S, by weight, having 10 μm or less of average ferritic grain size, and 20 mm/mm2 or less of generation frequency A, which generation frequency A is defined as the total length of a banded secondary phase structure observed per 1 mm2 of steel sheet cross section along the rolling direction thereof. The steel sheet is manufactured by, for example, a method comprising the steps of: hot-rolling a continuously cast slab having the composition described above at temperatures of Ar3 transformation point or above directly or after reheating thereof; and cooling the hot-rolled steel sheet within 2 seconds down to the temperatures of from 600 to 750° C. at cooling speeds of from 100 to 2,000° C./sec, followed by coiling the cooled steel sheet at temperatures of from 450 to 650° C. The present invention provides a high strength steel sheet having strengths of 340 MPa or more and having excellent stretch flanging performance, ductility, and shock resistance, providing a sufficient coil shape with good surface properties, even when hot dip zinc-coating is applied.
摘要翻译：高强度钢板本发明涉及一种高强度钢板，主要由以下组成的高强度钢板：基本上由Si：0.5〜0.1％，Si：0.5〜2％，Mn：0.05％以下，P：0.005％以下，O：0.005％以下，S：平均铁素体晶粒尺寸为10μm以下，发生频率A为20mm / mm 2以下的发生频率A，将发生频率A定义为观察到的带状二相结构的总长度每1mm 2钢板横截面沿其轧制方向。钢板通过例如以下方法制造：包括以下步骤：在Ar 3相变点或更高的温度下直接或重新加热上述具有上述组成的连续铸造板坯 ; 并在200〜2000℃/秒的冷却速度下，在2秒钟内将热轧钢板冷却至600〜750℃的温度，然后将冷却后的钢板在450〜 650℃。本发明提供强度为340MPa以上且具有优异的拉伸凸缘性能，延展性和抗冲击性的高强度钢板，提供具有良好表面性能的足够的线圈形状，即使当热浸锌涂层被申请;被应用。

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