Title:
690 MPA GRADE SUPER-THICK STEEL PLATE AND MANUFACTURING METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2020/143367
Kind Code:
A1
Abstract:
Disclosed are a 690 MPa grade super-thick steel plate and a manufacturing method therefor. The mass percentage contents of the chemical components thereof are as follows: 0.04-0.08% of C, 5.2-6.0% of Mn, 0.1-0.4% of Si, 0.1-0.5% of Mo, 0.2-0.6% of Ni, 0.2-0.6% of Cr, 0.01-0.05% of Ti, S: ≤0.005%, P: ≤0.010%, and the balance being Fe and impurities. The steel plate has manganese as a main alloying element, and has a reduced amount of expensive elements, such as nickel, added during the manufacturing of the super-thick steel plate, thereby reducing alloying costs. A super-thick steel plate prepared by using a specific manufacturing process has excellent core mechanical properties such as a high strength, a high plasticity and a high toughness, as well as lamellar tearing resistance, and can meet the requirements of strict service environments, such as ocean engineering, for high-performance super-thick steel plates.
Inventors:
SUN CHAO (CN)
LI DONGHUI (CN)
YIN YUQUN (CN)
ZHAO BOJIE (CN)
LI DONGHUI (CN)
YIN YUQUN (CN)
ZHAO BOJIE (CN)
Application Number:
PCT/CN2019/122904
Publication Date:
July 16, 2020
Filing Date:
December 04, 2019
Export Citation:
Assignee:
NANJING IRON & STEEL CO LTD (CN)
International Classes:
C22C33/04; C21D1/18; C21D6/00; C21D8/02; C21D9/00; C22C38/02; C22C38/44; C22C38/50; C22C38/58
Foreign References:
| CN109652733A | 2019-04-19 | |||
| CN104711489A | 2015-06-17 | |||
| CN107312981A | 2017-11-03 | |||
| CN102226255A | 2011-10-26 | |||
| CN103031498A | 2013-04-10 | |||
| CN106319380A | 2017-01-11 | |||
| US20160312327A1 | 2016-10-27 |
Attorney, Agent or Firm:
NANJING LI&FENG INTELLECTUAL PROPERTY AGENCY (SPECIAL CENERAL PARTNERSHIP) (CN)
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