Title:
PIPELINE STEEL PLATE FOR HIC-RESISTANT X80 ELBOW PIPE AND MANUFACTURING METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2018/176788
Kind Code:
A1
Abstract:
A pipeline steel plate for an HIC-resistant X80 elbow pipe. The chemical components of the pipeline steel plate, by mass percentage, are: C: ≤ 0.10%; Mn: 1.45-1.80%; Si: ≤ 0.45%; S: ≤ 0.001%; P: ≤ 0.010%; Nb: 0.045-0.08%; Ti: ≤ 0.012%; V: ≤ 0.008%; Alt: ≤ 0.06%; N: ≤ 0.0040%; O: ≤ 0.004%; Mo: ≤ 0.40%; Pb ≤ 0.0015%; Zn ≤ 0.003%; Sb ≤ 0.0015%; Sn ≤ 0.0015%; Cu: ≤ 0.30%; Ni: 0.20-1.5%; Cr: ≤ 0.35%, wherein Mo + Cu + Ni + Cr ≤ 1.5%, and Ca/S ≥ 1; Ceq: 0.43-0.54%; Pcm: 0.19 - 0.27%; and the balance of Fe and inevitable impurities. The manufacturing method comprises: preparing materials according to proportions; smelting the materials by a converter or an electric furnace; refining same outside the converter or the electric furnace; performing continuous casting; reheating a plate blank; performing a particular TMCP process and stack cooling after water cooling; and straightening. The particular TMCP comprises two-phase rolling and intermediate blank cooling.
Inventors:
JIANG CHANGLIN (CN)
GAO ZHUZHONG (CN)
CHU JIANYANG (CN)
LIN TAO (CN)
WANG XIAO (CN)
ZHU RENCHAO (CN)
HU JIANGUO (CN)
GAO ZHUZHONG (CN)
CHU JIANYANG (CN)
LIN TAO (CN)
WANG XIAO (CN)
ZHU RENCHAO (CN)
HU JIANGUO (CN)
Application Number:
PCT/CN2017/105453
Publication Date:
October 04, 2018
Filing Date:
October 10, 2017
Export Citation:
Assignee:
JIANGYIN XINGCHENG SPECIAL STEEL WORKS CO LTD (CN)
International Classes:
C22C38/04; C22C38/02; C22C38/06; C22C38/08; C22C38/12; C22C38/14; C22C38/16; C22C38/42; C22C38/46; C22C38/48; C22C38/50; C22C38/58
Foreign References:
| CN107099744A | 2017-08-29 | |||
| CN104073744A | 2014-10-01 | |||
| CN105950973A | 2016-09-21 | |||
| CN105950972A | 2016-09-21 | |||
| CN103225047A | 2013-07-31 | |||
| JPH09209037A | 1997-08-12 | |||
| JP2002129288A | 2002-05-09 |
Attorney, Agent or Firm:
BEIJING WITAL PATENT AGENCY LTD (CN)
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