Title:
TMCP-PRODUCED LOW-COST Q550D STEEL AND PRODUCTION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2024/088056
Kind Code:
A1
Abstract:
The present disclosure relates to the technical field of wide and thick plate metallurgy, and in particular to TMCP-produced low-cost Q550D steel and a production method therefor. In the present disclosure, a medium carbon design is used for components of a steel plate, so that the addition amount of an alloy is reduced while the strength is ensured; the reduction, temperature and cooling speed are accurately controlled during rolling and cooling, so that a heat treatment process is omitted; the obtained Q550D steel has 50-60% of bainite, 20-30% of acicular ferrite and 10-20% of pearlitic structure, has reasonable chemical composition and matrix structure combination, can achieve both high strength and excellent low-temperature impact toughness, and achieves low alloy costs; heat treatment is omitted during production, so that the manufacturing costs are further reduced, and the use and manufacturing requirements for large coal mining machines and engineering machinery can be met.
Inventors:
ZHU SHUCHENG (CN)
ZHENG HAIMING (CN)
HU HONGWEI (CN)
LI ZHONGBO (CN)
XU SHAOPU (CN)
LIU QINGBO (CN)
KANG WENJU (CN)
TANG ZHENGLEI (CN)
YANG YANG (CN)
XUE YANSHENG (CN)
YUAN YONGQI (CN)
QUAN WEIBO (CN)
WANG YONG (CN)
YANG CHUN (CN)
ZHU XIANXING (CN)
YUAN GAOJIAN (CN)
REN YI (CN)
ZHENG HAIMING (CN)
HU HONGWEI (CN)
LI ZHONGBO (CN)
XU SHAOPU (CN)
LIU QINGBO (CN)
KANG WENJU (CN)
TANG ZHENGLEI (CN)
YANG YANG (CN)
XUE YANSHENG (CN)
YUAN YONGQI (CN)
QUAN WEIBO (CN)
WANG YONG (CN)
YANG CHUN (CN)
ZHU XIANXING (CN)
YUAN GAOJIAN (CN)
REN YI (CN)
Application Number:
PCT/CN2023/123722
Publication Date:
May 02, 2024
Filing Date:
October 10, 2023
Export Citation:
Assignee:
NANYANG HANYE SPECIAL STEEL CO (CN)
International Classes:
C22C38/02; C21D8/02; C22C38/06; C22C38/22; C22C38/26; C22C38/28; C22C38/32; C22C38/38
Foreign References:
| CN116043104A | 2023-05-02 | |||
| CN110964979A | 2020-04-07 | |||
| CN114672725A | 2022-06-28 | |||
| CN108300939A | 2018-07-20 | |||
| JP2015175039A | 2015-10-05 | |||
| CN104404384A | 2015-03-11 | |||
| KR20220087989A | 2022-06-27 |
Attorney, Agent or Firm:
CHOFN INTELLECTUAL PROPERTY (CN)
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