Title:
CONTINUOUS HOT-ROLLED HIGH-STRENGTH PIPELINE STEEL COIL HAVING EXTREMELY HIGH THICKNESS SPECIFICATION AND MANUFACTURING METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2023/274218
Kind Code:
A1
Abstract:
The present invention relates to the field of hot rolled pipeline steel, and discloses a continuous hot-rolled high-strength pipeline steel coil having an extremely high thickness specification, the mass percentages of chemical components thereof being: C: 0.030-0.055％, Si: 0.10-0.30％, Mn: 1.30-1.65％, P: ≤0.015％; S: ≤0.0015％, Cr: ≤0.20％, Ni≤0.10％, Mo: 0.08-0.20％, Nb: 0.04-0.07％, Ti: 0.01-0.025％, Al: 0.01-0.045％, and the remainder being Fe. Also disclosed in the present invention is a manufacturing method for continuous hot-rolled high-strength pipeline steel coil having an extremely high thickness specification. The continuous hot-rolled high-strength pipeline steel coil having an extremely high thickness specification and the manufacturing method therefor of the present invention can significantly improve the strength, toughness, and manufacturability of high-thickness pipeline steel, thereby achieving good strength and toughness matching and a low yield ratio.
Inventors:
YUE JIANGBO (CN)
ZOU HANG (CN)
LI LIWEI (CN)
XU JINQIAO (CN)
MEI RONGLI (CN)
HUANG QUNXIN (CN)
YUAN JIN (CN)
CUI LEI (CN)
NIE SHUN (CN)
ZOU HANG (CN)
LI LIWEI (CN)
XU JINQIAO (CN)
MEI RONGLI (CN)
HUANG QUNXIN (CN)
YUAN JIN (CN)
CUI LEI (CN)
NIE SHUN (CN)
Application Number:
PCT/CN2022/101850
Publication Date:
January 05, 2023
Filing Date:
June 28, 2022
Export Citation:
Assignee:
WUHAN IRON & STEEL CO LTD (CN)
International Classes:
C22C38/02; B21B37/74; C21D8/02; C22C33/04; C22C38/04; C22C38/06; C22C38/44; C22C38/48; C22C38/50; C22C38/58
Foreign References:
| CN113549824A | 2021-10-26 | |||
| CN111748741A | 2020-10-09 | |||
| CN105568143A | 2016-05-11 | |||
| JP2015101781A | 2015-06-04 |
Attorney, Agent or Firm:
WUHAN KAIYUAN INTELLECTUAL PROPERTY AGENT LTD. (CN)
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