公开(公告)号：EP2808412A4

公开(公告)日：2015-12-16

申请号：EP13738542

申请日：2013-01-18

Applicant: JFE STEEL CORP

Inventor： MATSUKI YASUHIRO ,  OGURA TAKAHIKO ,  KAMI CHIKARA ,  NAKATA HIROSHI

IPC: C22C38/00 ,  B21B3/00 ,  B22D11/00 ,  B22D11/12 ,  C21D8/02 ,  C21D9/08 ,  C21D9/46 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/42 ,  C22C38/44 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54

CPC classification number: B22D11/001 ,  B21B3/00 ,  B22D11/12 ,  C21D8/0226 ,  C21D8/0263 ,  C21D9/08 ,  C21D9/46 ,  C21D9/52 ,  C22C38/001 ,  C22C38/002 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/42 ,  C22C38/44 ,  C22C38/48 ,  C22C38/50 ,  F16L9/02

Abstract: A steel strip for coiled tubing contains, in terms of percent by mass, C: 0.10% or more and 0.16% or less, Si: 0.1% or more and 0.5% or less, Mn: 0.5% or more and 1.5% cr less, P: 0.02% or less, S: 0.005% or less, Sol. Al: 0.01% or more and 0.07% or less, Cr: 0.4% or more and 0.8% or less, Cu: 0.1% or more and 0.5% or less, Ni: 0.1% or more and 0.3% or less, Mo: 0.1% or more and 0.2% or less, Nb: 0.01% or more and 0.04% or less, Ti: 0.005% or more and 0.03% or less, N: 0.005% or less, and the balance of Fe and inevitable impurities.

Abstract translation: 用于连续油管的钢带以质量％计含有C：0.10％以上且0.16％以下，Si：0.1％以上且0.5％以下，Mn：0.5％以上且1.5％以下 ，P：0.02％以下，S：0.005％以下，Sol。 Al：0.01％以上且0.07％以下，Cr：0.4％以上且0.8％以下，Cu：0.1％以上且0.5％以下，Ni：0.1％以上且0.3％以下，Mo： 0.1％以上且0.2％以下，Nb：0.01％以上且0.04％以下，Ti：0.005％以上且0.03％以下，N：0.005％以下，余量由Fe和不可避免的杂质构成。

公开(公告)号：EP3199657A4

公开(公告)日：2017-08-23

申请号：EP15843336

申请日：2015-08-06

Applicant: JFE STEEL CORP

Inventor： MATSUKI YASUHIRO

IPC: C22C38/00 ,  B21B1/26 ,  B21C37/08 ,  B23K11/00 ,  B23K11/087 ,  B23K11/16 ,  B23K101/06 ,  B23K103/04 ,  C21D8/02 ,  C21D8/10 ,  C21D9/08 ,  C21D9/50 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/54

CPC classification number: F16L9/165 ,  B21B1/26 ,  B21C37/08 ,  B21C37/083 ,  B23K11/0873 ,  B23K11/16 ,  B23K2201/04 ,  B23K2201/06 ,  B23K2203/04 ,  C21D6/001 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0205 ,  C21D8/0226 ,  C21D8/0263 ,  C21D8/105 ,  C21D9/08 ,  C21D9/52 ,  C21D2211/005 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  F16L9/17

Abstract: A steel strip for an electric-resistance-welded steel pipe or tube having a strength of X70 grade or more and excellent HIC resistance and SSC resistance is provided. A steel strip for an electric-resistance-welded steel pipe or tube has a chemical composition containing, in mass%: C: 0.02% to 0.06%; Si: 0.1% to 0.3%; Mn: 0.8% to 1.3%; P: 0.01% or less; S: 0.001% or less; V: 0.04% to 0.07%; Nb: 0.04% to 0.07%; Ti: 0.01% to 0.04%; Cu: 0.1% to 0.3%; Ni: 0.1% to 0.3%; Ca: 0.001% to 0.005%; Al: 0.01% to 0.07%; and N: 0.007% or less, with a balance being Fe and incidental impurities, contents of C, Nb, V, and Ti satisfying the following Expression (1) C ˆ’ 12 Nb / 92.9 + V / 50.9 + Ti / 47.9 ‰¤ 0.03 % wherein a ferrite area ratio is 90% or more.

Abstract translation: 本发明提供强度为X70级以上，耐HIC性，耐SSC性优异的电焊钢管用钢带。 本发明的电焊钢管用钢带的成分组成以质量％计含有C：0.02〜0.06％。 Si：0.1〜0.3％ Mn：0.8％至1.3％; P：0.01％以下; S：0.001％以下; V：0.04％至0.07％; Nb：0.04〜0.07％ Ti：0.01〜0.04％ Cu：0.1〜0.3％ Ni：0.1〜0.3％ Ca：0.001〜0.005％ Al：0.01％至0.07％; N：0.007％以下，余量为Fe和不可避免的杂质，C，Nb，V和Ti的含量满足下述式（1）C'12 Nb / 92.9 + V / 50.9 + Ti / 47.9‰ ≈0.03％，铁素体面积率为90％以上。

公开(公告)号：EP2796216A4

公开(公告)日：2015-06-03

申请号：EP12859517

申请日：2012-12-20

Applicant: JFE STEEL CORP

Inventor： OGURA TAKAHIKO ,  SHIGETA HIROSHI ,  FUKUI YOSHIMITSU ,  IIJIMA YOSHITSUGU ,  MIKAMI KEI ,  MATSUKI YASUHIRO

IPC: B21B1/38 ,  B21B37/24

CPC classification number: B21H7/00 ,  B21B1/22 ,  B21B37/24 ,  B21B2001/225 ,  B21B2205/02 ,  B21C37/0803 ,  B21C37/083 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/42 ,  C22C38/44 ,  C22C38/48 ,  C22C38/50 ,  Y10T428/12389

Abstract: Provided is a metal strip for a pipe with which the weight of a pipe can be reduced while maintaining the strength of a joint portion that tends to be structurally the weakest. A metal strip L is formed by rolling. The thickness of each of a head end portion 1a and a tail end portion 1b, which are longitudinal end portions 1, is greater than the thickness of an intermediate portion excluding the longitudinal end portions 1. The metal strips are connected to each other in series by welding, and a pipe is made by performing a pipe-forming operation.