基本信息:
- 专利标题： 저온 인성이 우수한 고강도 후육 라인 파이프용 용접 강관 및 그 제조 방법
- 专利标题（英）：Weld steel pipe with excellent low-temperature toughness for high-strength thick-walled line pipe and process for producing the same
- 专利标题（中）：用于高强度厚壁线管的优良低温韧性的焊接钢管及其制造方法
- 申请号：KR1020097007844 申请日：2007-12-04
- 公开(公告)号：KR101119239B1 公开(公告)日：2012-03-20
- 发明人： 하라다쿠야 , 아사히히토시
- 申请人： 신닛테츠스미킨 카부시키카이샤
- 申请人地址： *-*, Marunouchi *-chome, Chiyoda-ku, Tokyo, Japan
- 专利权人： 신닛테츠스미킨 카부시키카이샤
- 当前专利权人： 신닛테츠스미킨 카부시키카이샤
- 当前专利权人地址： *-*, Marunouchi *-chome, Chiyoda-ku, Tokyo, Japan
- 代理人： 박장원
- 优先权： JPJP-P-2006-327099 2006-12-04; JPJP-P-2007-309477 2007-11-29
- 国际申请： PCT/JP2007/073740 2007-12-04
- 国际公布： WO2008069335 2008-06-12
- 主分类号： C22C38/00
- IPC分类号： C22C38/00 ; B21C37/08 ; C21D8/02 ; C22C38/14
10C + 100Al + 5Mo + 5Ni
The present invention provides an excellent high strength huyuk line pipe welded steel pipe, and a manufacturing method for low-temperature toughness, C: 0.010 to 0.050%, Si: 0.01 to 0.50%, Mn: 0.50 to 2.00%, Al: 0.020% or less, Ti: 0.003 to 0.030%, Mo: 0.10, and containing 1.50%, and the carbon equivalent Ceq of 0.30 to 0.53, cracking susceptibility Pcm 0.10 to 0.20, equation (3) satisfies a, of 20% or less by area ratio It made of a less than 80% bainite with polygonal ferrite and an area ratio, then molding the base material steel plate 20 ㎛ or less effective as grain wonder tubular seam welding, and to the welding heat affected zone of the effective crystal grain diameter less than 150 ㎛. 10C + 100Al + 5Mo + 5Ni <3.3 ??? (Equation 3) Low-temperature toughness, for strength, huyuk welded steel line pipe, cracking susceptibility
公开/授权文献:
- KR1020090055637A 저온 인성이 우수한 고강도 후육 라인 파이프용 용접 강관 및 그 제조 방법 公开/授权日：2009-06-02
信息查询:
EspacenetIPC结构图谱:
| C | 化学；冶金 |
| --C22 | 冶金（铁的冶金入C21）；黑色或有色金属合金；合金或有色金属的处理 |
| ----C22C | 合金 |
| ------C22C38/00 | 铁基合金，例如合金钢 |