专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US07942984B2 Steel pipe with good magnetic properties and method of producing the same 有权
标题翻译：具有良好磁性能的钢管及其制造方法
公开(公告)号：US07942984B2
公开(公告)日：2011-05-17
申请号：US11791503
申请日：2005-09-01
申请人： Yasuhide Ishiguro , Yoshikazu Kawabata , Kei Sakata , Masayuki Sakaguchi , Masayoshi Ishida , Motoaki Itadani , Yasue Koyama
发明人： Yasuhide Ishiguro , Yoshikazu Kawabata , Kei Sakata , Masayuki Sakaguchi , Masayoshi Ishida , Motoaki Itadani , Yasue Koyama
IPC分类号： H01F1/147
CPC分类号： C22C38/02 , C21D8/10 , C21D8/12 , C22C38/04 , C22C38/06 , H01F1/14766
摘要： A steel pipe blank having a composition containing 0.5% or less C and 85% or more Fe in terms of mass percent is heated, and stretch-reducing is then performed so that the diameter decrease ratio is 15% or more and the rolling finishing temperature is (the Ar3 transformation point−10)° C. or lower. Consequently, a structure in which the ratio of X-ray diffraction intensity obtained from the plane in which the direction of crystal grains is preferentially oriented parallel to the circumference direction and the direction of crystal grains is preferentially oriented parallel to the rolling direction of the steel pipe to that obtained for a three-dimensionally randomly oriented sample is 3.0 or more is formed, and the r-value is increased, thereby improving the magnetic properties of the steel pipe.
摘要翻译：将具有以质量百分比计含量为0.5％以下且Fe为85％以上的Fe的组成的钢管坯加热，然后进行拉伸减少，使得直径减小率为15％以上，轧制终轧温度是（Ar3转化点-10）℃或更低。因此，从晶粒的<100>方向优选平行于圆周方向的平面和晶粒的<011>方向获得的X射线衍射强度的比优先取向为平行于钢管的轧制方向与三维随机取向试样的轧制方向成为3.0以上，r值增加，从而提高钢管的磁特性。

2. 发明授权

US06736910B2 High carbon steel pipe excellent in cold formability and high frequency hardenability and method for producing the same 失效
标题翻译：冷成型性优异，高频淬透性优良的高碳钢管及其制造方法
公开(公告)号：US06736910B2
公开(公告)日：2004-05-18
申请号：US10048322
申请日：2002-01-29
申请人： Takaaki Toyooka , Yoshikazu Kawabata , Akira Yorifuji , Masanori Nishimori , Motoaki Itadani , Takatoshi Okabe , Masatoshi Aratani , Yasue Koyama
发明人： Takaaki Toyooka , Yoshikazu Kawabata , Akira Yorifuji , Masanori Nishimori , Motoaki Itadani , Takatoshi Okabe , Masatoshi Aratani , Yasue Koyama
IPC分类号： C22C3802
CPC分类号： B21C37/30 , B21B17/14 , B21C37/06 , B21C37/08 , B21C37/16 , C21D8/10 , C22C38/002 , C22C38/02 , C22C38/04 , Y10S148/909
摘要： The invention provides a high-carbon steel pipe having superior cold workability and induction hardenability, and a method of producing the steel pipe. The method comprises the steps of heating or soaking a base steel pipe having a composition containing C: 0.3 to 0.8%, Si: not more than 2%, and Mn: not more than 3%, and then carrying out reducing rolling on the base steel pipe at least in the temperature range of (Ac1, transformation point −50° C.) to Ac1, transformation point with an accumulated reduction in diameter of not less than 30%. A structure in which the grain size of cementite is not greater than 1.0 &mgr;m is obtained, thus resulting in improved cold workability and induction hardenability.
摘要翻译：本发明提供一种具有优异的冷加工性和感应淬透性的高碳钢管，以及钢管的制造方法。该方法包括以下步骤：加热或浸泡含有C：0.3〜0.8％，Si：2％以下，Mn：3％以下的组成的基础钢管，然后在基材上进行还原轧制钢管至少在（Ac1，相变点-50℃）至Ac1的温度范围内，相变点的直径累积减小不小于30％。获得了渗碳体的粒径不大于1.0μm的结构，从而提高了冷加工性和感应淬透性。

3. 发明申请

US20080011389A1 Steel Pipe With Good Magnetic Properties And Method Of Producing The Same 有权
标题翻译：具有良好磁性的钢管及其制造方法
公开(公告)号：US20080011389A1
公开(公告)日：2008-01-17
申请号：US11791503
申请日：2005-09-01
申请人： Yasuhide Ishiguro , Yoshikazu Kawabata , Kei Sakata , Masayuki Sakaguchi , Motoaki Itadani , Yasue Koyama , Masayoshi Ishida
发明人： Yasuhide Ishiguro , Yoshikazu Kawabata , Kei Sakata , Masayuki Sakaguchi , Motoaki Itadani , Yasue Koyama , Masayoshi Ishida
IPC分类号： H01F1/00
CPC分类号： C22C38/02 , C21D8/10 , C21D8/12 , C22C38/04 , C22C38/06 , H01F1/14766
摘要： A steel pipe with good magnetic properties and a method of producing the same are proposed. Specific solutions are as follows. A steel pipe blank having a composition containing 0.5% or less C and 85% or more Fe in terms of mass percent is heated, and stretch-reducing is then performed so that the diameter decrease ratio is 15% or more and the rolling finishing temperature is (the Ar3 transformation point −10)° C. or lower. Consequently, a structure in which the ratio of X-ray diffraction intensity obtained from the plane in which the direction of crystal grains is preferentially oriented parallel to the circumference direction and the direction of crystal grains is preferentially oriented parallel to the rolling direction of the steel pipe to that obtained for a three-dimensionally randomly oriented sample is 3.0 or more is formed, and the r-value is increased, thereby improving the magnetic properties of the steel pipe. Furthermore, when annealing is performed at a temperature in the range of 550° C. to the Ac1 transformation point after the stretch-reducing, the crystal grain size is coarsened to further improve the magnetic properties. Cold drawing may be performed prior to the annealing. When a steel pipe having a high-purity composition containing less than 0.01% C and 95% or more Fe is used as the steel pipe blank, the magnetic properties are further improved. In order to further improve the magnetic properties, appropriate amounts of Si and Al are preferably contained. In addition, an appropriate content of Cr improves the magnetic properties in the high-frequency range.
摘要翻译：提出了具有良好磁特性的钢管及其制造方法。具体方案如下。将具有以质量百分比计含量为0.5％以下且Fe为85％以上的Fe的组成的钢管坯加热，然后进行拉伸减少，使得直径减小率为15％以上，轧制终轧温度是（Ar 3 3相变点-10）℃以下。因此，从晶粒的<100>方向优选平行于圆周方向的平面和晶粒的<011>方向获得的X射线衍射强度的比优先取向为平行于钢管的轧制方向与三维随机取向试样的轧制方向成为3.0以上，r值增加，从而提高钢管的磁特性。此外，当在拉伸还原后，在550℃的温度下进行退火至Ac 1 H 2相变点时，晶粒尺寸粗大化，进一步提高磁特性。冷拉拔可以在退火之前进行。当使用含有小于0.01％C和95％以上Fe的高纯度组成的钢管作为钢管坯时，磁特性进一步提高。为了进一步提高磁特性，优选含有适量的Si和Al。另外，适当的Cr含量能够提高高频范围的磁特性。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式