Title:
STEEL MATERIAL AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2020/262638
Kind Code:
A1
Abstract:
The steel material according to the present invention has a prescribed chemical composition, and is, from among (Zr, B)-containing oxide particles comprising 5.0 mass% or more of Zr, 0.1 mass% or more of B, and 1.0 mass% or more of O, (Zr, B)-containing oxide particles having a circle-equivalent diameter of 0.5 μm or greater with Insol. Zr: 0.0007-0.0040%, Sol. Zr: 0.0010% or less, and BF expressed by the prescribed formulas (1) and (2) being 0.0030% or less. The number density of (Zr, B)-containing oxide particles for which a composition of Al2O3 accounts for 50 mass% or less is 5-300 particles/mm2.
Inventors:
IMAJO DAIKI (JP)
SHINTAKU YOSHIAKI (JP)
NAKAI KEISUKE (JP)
NAKAMURA SHINGO (JP)
SHINTAKU YOSHIAKI (JP)
NAKAI KEISUKE (JP)
NAKAMURA SHINGO (JP)
Application Number:
PCT/JP2020/025314
Publication Date:
December 30, 2020
Filing Date:
June 26, 2020
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
International Classes:
B21B3/00; B21B1/26; B21B37/74; B22D1/00; B22D11/00; B22D11/124; B22D11/22; C21C7/04; C21C7/10; C21D8/02; C22C38/00; C22C38/58
Domestic Patent References:
| WO2019058424A1 | 2019-03-28 |
Foreign References:
| JP2019023324A | 2019-02-14 | |||
| JP2019035107A | 2019-03-07 |
Attorney, Agent or Firm:
TANAI Sumio et al. (JP)
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