Title:
Q690D THICK PLATE PRODUCED BY ULTRA FAST COOLING PROCESS AND MANUFACTURING METHOD
Document Type and Number:
WIPO Patent Application WO/2020/098288
Kind Code:
A1
Abstract:
Disclosed in the present invention is a Q690D thick plate produced by an ultra fast cooling process, related to the technical field of metallurgy, having the following chemical components and mass percentages thereof: C: 0.05%-0.10%, Si: 0.20%-0.50%, Mn: 1.40%-1.80%, P ≤ 0.020%, S ≤ 0.003%, Cr: 0.10%-0.50%, Mo: 0.08%-0.30%, Ti: 0.008%-0.030%, Nb: 0.015%-0.050%, B: 0.0008%-0.0025%, Ceq ≤ 0.43, and the remainder being Fe and unavoidable contaminants. The present invention uses low-carbon and alloying component design, providing a high-strength Q690D steel thick plate, the production process having a simple flow, rapid production rhythm and low cost.
Inventors:
JIANG ZAIWEI (CN)
ZHANG QINGHUI (CN)
YAN QIANGJUN (CN)
HOU ZHONGHUA (CN)
JIANG HUI (CN)
ZHANG YIJIE (CN)
ZHANG QINGHUI (CN)
YAN QIANGJUN (CN)
HOU ZHONGHUA (CN)
JIANG HUI (CN)
ZHANG YIJIE (CN)
Application Number:
PCT/CN2019/093665
Publication Date:
May 22, 2020
Filing Date:
June 28, 2019
Export Citation:
Assignee:
NANJING IRON & STEEL CO LTD (CN)
International Classes:
C22C38/02; C21D8/02; C22C38/04; C22C38/22; C22C38/26; C22C38/28; C22C38/32; C22C38/38
Foreign References:
| CN109338225A | 2019-02-15 | |||
| CN102851604A | 2013-01-02 | |||
| CN102888565A | 2013-01-23 | |||
| CN107675097A | 2018-02-09 |
Attorney, Agent or Firm:
NANJING LI&FENG INTELLECTUAL PROPERTY AGENCY (SPECIAL CENERAL PARTNERSHIP) (CN)
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