Title:
980 MPA-GRADE BAINITE HIGH HOLE EXPANSION STEEL AND MANUFACTURING METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2022/042731
Kind Code:
A1
Abstract:
Disclosed are a 980 MPa-grade bainite high hole expansion steel and a manufacturing method therefor. The steel contains the following chemical components in percentages by weight: 0.05-0.10% of C, 0.5-2.0% of Si, 1.0-2.0% of Mn, P≤0.02％, S≤0.003％, 0.02-0.08% of Al, N≤0.004％, Mo≥0.1％, 0.01-0.05% of Ti, Cr≤0.5％, B≤0.002％, O≤0.0030％, and the balance of Fe and other inevitable impurities. The high hole expansion steel of the present invention has a yield strength of ≥800 MPa and a tensile strength of ≥980MPa, has a good elongation rate (the transverse A50 being ≥11％) and hole expansion performance (the hole expansion rate being ≥40％), and can be applied to a position on a chassis part of a passenger car, such as a control arm and a vice frame, where high strength and thinning are required.
Inventors:
WANG HUANRONG (CN)
YANG FENG (CN)
ZHANG CHEN (CN)
YANG ANA (CN)
YANG FENG (CN)
ZHANG CHEN (CN)
YANG ANA (CN)
Application Number:
PCT/CN2021/115433
Publication Date:
March 03, 2022
Filing Date:
August 30, 2021
Export Citation:
Assignee:
BAOSHAN IRON & STEEL (CN)
International Classes:
C22C38/02; C21D8/02; C22C33/04; C22C38/04; C22C38/06; C22C38/20; C22C38/22; C22C38/24; C22C38/26; C22C38/28; C22C38/32; C22C38/42; C22C38/44; C22C38/46; C22C38/48; C22C38/50; C22C38/54
Foreign References:
| CN101400816A | 2009-04-01 | |||
| CN102011053A | 2011-04-13 | |||
| CN107849663A | 2018-03-27 | |||
| JP2010111936A | 2010-05-20 | |||
| CN106119702A | 2016-11-16 |
Other References:
See also references of EP 4206351A4
Attorney, Agent or Firm:
SHANGHAI PATENT & TRADEMARK LAW OFFICE, LLC (CN)
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