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Title:
STEEL FOR STEEL CORD HAVING TENSILE STRENGTH GREATER THAN OR EQUAL TO 4,000 MPA AND PRODUCTION METHOD
Document Type and Number:
WIPO Patent Application WO/2023/071299
Kind Code:
A1
Abstract:
The present invention relates to the technical field of iron and steel production. Disclosed are steel for a steel cord having a tensile strength greater than or equal to 4,000 MPa and a production method. The steel comprises the following chemical components in percentage by weight: C: 0.89-1.10 wt%, Si: 0.10-0.30 wt%, Mn: 0.20-0.60 wt%, P≤0.015 wt%, S≤0.010 wt%, Cr: 0.01-0.40 wt%, Ni: 0.01-0.20 wt%, Cu: 0.005-0.30 wt%, Al≤0.0020 wt%, Ti≤0.0016 wt%, N≤0.0070 wt%, and the balance of Fe and inevitable impurities. A steel wire rod is mainly composed of a sorbite structure, so as to avoid affecting the formation of a network cementite used in drawing; and the tensile strength of the final finished steel cord is 4,000 MPa or above, thereby satisfying the requirements of energy conservation, environmental protection and continuous increase of the strength of a lightweight automotive tire steel cord.

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Inventors:
LI YUHUA (CN)
DENG WEI (CN)
LI YINGKUI (CN)
Application Number:
PCT/CN2022/105612
Publication Date:
May 04, 2023
Filing Date:
July 14, 2022
Export Citation:
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Assignee:
NANJING IRON & STEEL CO LTD (CN)
International Classes:
C22C38/02; C21D8/06; C22C38/04; C22C38/08; C22C38/14; C22C38/16; C22C38/18
Foreign References:
CN114318149A2022-04-12
CN114182164A2022-03-15
CN106574343A2017-04-19
CN110230008A2019-09-13
JP2017066435A2017-04-06
Attorney, Agent or Firm:
NANJING LI&FENG INTELLECTUAL PROPERTY AGENCY (SPECIAL GENERAL PARTNERSHIP) (CN)
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