Title:
METHOD FOR PREPARING NON-QUENCHED AND TEMPERED STEEL FOR LARGE-SPECIFICATION DIRECT CUTTING
Document Type and Number:
WIPO Patent Application WO/2022/227891
Kind Code:
A1
Abstract:
A method for preparing non-quenched and tempered steel for large-specification direct cutting. The steel components are: 0.40-0.48％ C, 0.20-0.35％ Si, 0.80-1.30％ Mn, P≤0.020％, S≤0.035％, 0.10-0.20％ Cr, 0.05％-0.13％ V, 0.010％-0.020％ Ti, Ni≤0.025％, Mo≤0.015％, Al≤0.030％, Cu≤0.2％, 130-200ppm N, H≤2.0ppm, O≤20ppm, and the remainder is Fe and inevitable impurities. The method omits commonly used Nb while not increasing the silicon content. By means of optimizing the composition and using semi-continuous rolling technology to achieve a controlled rolling and controlled cooling process, non-quenched and tempered steel for large-specification direct cutting which has an ideal structure and comprehensive mechanical properties is finally obtained.
Inventors:
GAO HUAYAO (CN)
LIU DONGLIN (CN)
JIANG HONGLIANG (CN)
DU YAN (CN)
ZHOU ZHAN (CN)
ZHU KANGNING (CN)
ZHANG CHUNXIANG (CN)
LIU DONGLIN (CN)
JIANG HONGLIANG (CN)
DU YAN (CN)
ZHOU ZHAN (CN)
ZHU KANGNING (CN)
ZHANG CHUNXIANG (CN)
Application Number:
PCT/CN2022/080600
Publication Date:
November 03, 2022
Filing Date:
March 14, 2022
Export Citation:
Assignee:
JIANGSU YONGGANG GROUP CO LTD (CN)
International Classes:
B21B1/16; B21B37/74; B21B45/02; B21B45/08; C22C38/02; C22C38/04; C22C38/06; C22C38/42; C22C38/44; C22C38/46; C22C38/50
Foreign References:
| CN113134510A | 2021-07-20 | |||
| CN111549282A | 2020-08-18 | |||
| CN104032214A | 2014-09-10 | |||
| CN110592476A | 2019-12-20 | |||
| CN108246801A | 2018-07-06 | |||
| CN105648170A | 2016-06-08 | |||
| CN111647799A | 2020-09-11 | |||
| KR101837862B1 | 2018-03-12 |
Attorney, Agent or Firm:
NANJING DOYES INTELLECTUAL PROPERTY CO., LTD. (CN)
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