Title:
WIDE AND HEAVY STEEL PLATE HAVING ULTRAHIGH STRENGTH AND CONTAINING RARE EARTH AND PREPARATION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2023/087883
Kind Code:
A1
Abstract:
A wide and heavy steel plate having ultrahigh strength and containing rare earth and a preparation method therefor, which relate to the technical field of steel production. The steel plate comprises the following chemical components in percentages by mass: C: 0.10%-0.18%, Mn: 0.55%-1.35%, Si: 0.15%-0.35%, Cr: 0.20%-0.70%, Mo: 0.25%-0.65%, Ni: 0.85%-1.25%, Nb: 0.016%-0.044%, V: 0.025%-0.065%, Ti ≤ 0.010%, Al: 0.025%-0.070%, B: 0.001%-0.003%, P ≤ 0.015%, S ≤ 0.002%, T.O ≤ 0.0010%, N ≤ 0.0055%, Ce ≤ 0.0050 ppm, and the balance of iron and inevitable impurities. The steel plate has a tensile strength of 1400-1470 MPa, a yield strength of 1200-1300 MPa, an elongation of 10.0%-12.5%, a low temperature impact toughness at -40°C of 90-150 J, and a flatness of 3 mm/m and 5 mm/2m.
Inventors:
YAN QIANGJUN (CN)
LIU CHENGJUN (CN)
ZHANG BO (CN)
JIN JIANFENG (CN)
GE XIN (CN)
HUANG BIAOKAI (CN)
LI QINGCHUN (CN)
LEI XIAORONG (CN)
LIU CHENGJUN (CN)
ZHANG BO (CN)
JIN JIANFENG (CN)
GE XIN (CN)
HUANG BIAOKAI (CN)
LI QINGCHUN (CN)
LEI XIAORONG (CN)
Application Number:
PCT/CN2022/119352
Publication Date:
May 25, 2023
Filing Date:
September 16, 2022
Export Citation:
Assignee:
NANJING IRON & STEEL CO LTD (CN)
International Classes:
C22C38/02; C21C7/00; C21D8/02; C22C33/06; C22C38/04; C22C38/06; C22C38/44; C22C38/46; C22C38/48; C22C38/50; C22C38/54
Foreign References:
| CN114182168A | 2022-03-15 | |||
| CN113637900A | 2021-11-12 | |||
| CN110512151A | 2019-11-29 | |||
| CN113061815A | 2021-07-02 | |||
| EP3299486A1 | 2018-03-28 | |||
| CN109750228A | 2019-05-14 |
Attorney, Agent or Firm:
NANJING LI&FENG INTELLECTUAL PROPERTY AGENCY (SPECIAL GENERAL PARTNERSHIP) (CN)
Download PDF: