Title:
9NI STEEL AND PRODUCTION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2023/179059
Kind Code:
A1
Abstract:
The present invention discloses 9Ni steel and a production method therefor, and relates to the technical field of steel production. The steel comprises the following chemical components in percentages by mass: C: 0.030-0.060%, Si: 0.10-0.30%, Mn: 0.50-0.80%, P≤0.005%, S≤0.002%, residual Nb≤0.0050%, residual V≤0.003%, residual Ti≤0.005%, Ni: 8.50-9.50%, Cr≤0.05%, Mo≤0.05%, Cu≤0.050%, Al: 0.020-0.050%, B≤0.0005%, Mg: 0.0008-0.0020%, N≤0.0060%, H≤0.0002%, and the balance of Fe and inevitable impurities. By means of a series of process improvements on smelting, rolling, heat treatment, etc., the process problem of intergranular cracks of the steel grade is solved, the advantages of batch smelting and manufacturing of the steel grade are obtained, the manufacturing stability is greatly improved, and the manufacturing cost is greatly reduced.
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Inventors:
QIAO MINGLIANG (CN)
WU JUNPING (CN)
ZHAI DONGYU (CN)
LIU XINYANG (CN)
YANG LIU (CN)
WU JUNPING (CN)
ZHAI DONGYU (CN)
LIU XINYANG (CN)
YANG LIU (CN)
Application Number:
PCT/CN2022/132291
Publication Date:
September 28, 2023
Filing Date:
November 16, 2022
Export Citation:
Assignee:
NANJING IRON & STEEL CO LTD (CN)
International Classes:
C22C38/02; B22D11/12; C21C7/00; C21C7/06; C21C7/064; C21C7/10; C21D8/02; C22C33/04; C22C38/04; C22C38/06; C22C38/42; C22C38/44; C22C38/46; C22C38/48; C22C38/50; C22C38/54
Foreign References:
| CN103602888A | 2014-02-26 | |||
| CN113046655A | 2021-06-29 | |||
| CN114737114A | 2022-07-12 | |||
| JP2019081929A | 2019-05-30 |
Attorney, Agent or Firm:
NANJING LI&FENG INTELLECTUAL PROPERTY AGENCY (SPECIAL GENERAL PARTNERSHIP) (CN)
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