Title:
WIRE ROD
Document Type and Number:
WIPO Patent Application WO/2023/190994
Kind Code:
A1
Abstract:
A wire rod comprising a chemical composition in a predetermined range, wherein, when the diameter of the wire rod is D, in a cross section perpendicular to the longitudinal direction of the wire rod, the metal structure at the position of a depth 1/4D from the surface includes 70-100% of pearlite in area ratio, the remainder when pearlite is less than 100% comprising one or two selected from the group consisting of ferrite and bainite, wherein a mean value of Vickers hardness in the cross section is greater than or equal to 415×F1-90 and less than or equal to 465×F1-80, and the difference (HVs-HVc) between a Vickers hardness HVs at the position of a depth 0.5 mm from the surface and a Vickers hardness HVc in a central portion is less than or equal to 20. F1=(C%)+0.14×(Si%)+0.20×(Mn%)+0.11×(Cr%)+0.50×(Mo%)
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Inventors:
OKONOGI MAKOTO (JP)
Application Number:
PCT/JP2023/013402
Publication Date:
October 05, 2023
Filing Date:
March 30, 2023
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
International Classes:
C22C38/00; C21D8/06; C22C38/54
Domestic Patent References:
| WO2020230880A1 | 2020-11-19 |
Foreign References:
| JP2020125538A | 2020-08-20 | |||
| JP2015168882A | 2015-09-28 | |||
| JP2007023310A | 2007-02-01 |
Attorney, Agent or Firm:
TAIYO, NAKAJIMA & KATO (JP)
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