Title:
13MNNI6 STEEL FOR CRYOGENIC LIQUID HYDROCARBON STORAGE TANK AND MANUFACTURING METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2022/148003
Kind Code:
A1
Abstract:
The present invention relates to the technical field of steel production. Disclosed are a 13MnNi6 steel for a cryogenic liquid hydrocarbon storage tank and a manufacturing method therefor. The 13MnNi6 steel for a cryogenic liquid hydrocarbon storage tank comprises the following chemical compositions in percentage by mass: C: 0.10%-0.15%, Si: 0.20%-0.40%, Mn: 1.30%-1.50%, P: ≤0.015%, S: ≤0.0050%, Ni: 0.50%-0.80%, Nb: 0.015%-0.050%, Ti: 0.006%-0.020%, Cr: 0.10%-0.30%, Al: 0.005%-0.015%, Mg: 0.0008%-0.0015%, N:≤0.0050%, the remainder being Fe, and unavoidable impurities without Ca. The microalloying technology is used to effectively reduce the size of an inclusion, reduce the original austenite grain size, and refine structure grains, and by means of TMCP rolling and heat treatment processes, the product strength and low-temperature toughness are improved, and the welding performance of a steel plate is improved.
Inventors:
ZHAI DONGYU (CN)
FANG LEI (CN)
WU JUNPING (CN)
HONG JUN (CN)
JIANG JINXING (CN)
LIU SHUAI (CN)
LIU TONG (CN)
FANG LEI (CN)
WU JUNPING (CN)
HONG JUN (CN)
JIANG JINXING (CN)
LIU SHUAI (CN)
LIU TONG (CN)
Application Number:
PCT/CN2021/108019
Publication Date:
July 14, 2022
Filing Date:
July 23, 2021
Export Citation:
Assignee:
NANJING IRON & STEEL CO LTD (CN)
International Classes:
C21C5/28; C22C38/02; C21C7/06; C21C7/064; C21C7/10; C21D1/18; C21D1/28; C21D8/02; C21D9/00; C22C33/06; C22C38/04; C22C38/06; C22C38/48; C22C38/50
Foreign References:
| CN112877597A | 2021-06-01 | |||
| CN112853219A | 2021-05-28 | |||
| CN102851591A | 2013-01-02 | |||
| JP2002003983A | 2002-01-09 | |||
| CN111270150A | 2020-06-12 | |||
| CN111270149A | 2020-06-12 |
Attorney, Agent or Firm:
NANJING LI&FENG INTELLECTUAL PROPERTY AGENCY (SPECIAL GENERAL PARTNERSHIP) (CN)
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