Title:
WIRE ROD AND MANUFACTURING METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2018/079781
Kind Code:
A1
Abstract:
A wire rod according to this embodiment has a predetermined chemical composition, and, in a structure observed in a center portion of a lateral cross-section of the wire rod, the area proportion of perlite is equal to or greater than 90.0%, the area proportion of pro-eutectoid cementite is equal to or less than 1.00%, the average thickness of the pro-eutectoid cementite is equal to or less than 0.25 μm, the total length of the pro-eutectoid cementite per unit area is less than 40.0 mm/mm2, the tensile strength satisfies expression (1), and the diameter is 3.0-5.5 mm. Expression (1): 1000 × C content (%) + 300 × Cr content (%) + 70 ≤ TS ≤ 1000 × C content (%) + 300 × Cr content (%) + 160
Inventors:
SAKAMOTO MASASHI (JP)
KODAMA JUNICHI (JP)
SAITO KEISUKE (JP)
KODAMA JUNICHI (JP)
SAITO KEISUKE (JP)
Application Number:
PCT/JP2017/039166
Publication Date:
May 03, 2018
Filing Date:
October 30, 2017
Export Citation:
Assignee:
NIPPON STEEL & SUMITOMO METAL CORP (JP)
International Classes:
C22C38/18; C21D8/06; C21D9/52; C22C38/54
Foreign References:
| JP2003183778A | 2003-07-03 | |||
| JPH04254526A | 1992-09-09 | |||
| JPH05295436A | 1993-11-09 | |||
| JPH08295933A | 1996-11-12 | |||
| JP2016211590A | 2016-12-15 | |||
| JP5179331B2 | 2013-04-10 | |||
| JP4088220B2 | 2008-05-21 | |||
| JP2001181789A | 2001-07-03 |
Other References:
See also references of EP 3533898A4
Attorney, Agent or Firm:
TANAI Sumio et al. (JP)
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