Metal treatment – Process of modifying or maintaining internal physical... – With casting or solidifying from melt
Patent
1993-07-28
1995-02-28
Yee, Deborah
Metal treatment
Process of modifying or maintaining internal physical...
With casting or solidifying from melt
148547, C21D 802
Patent
active
053933583
ABSTRACT:
An abrasion-resistant steel having excellent surface property consists essentially of 0.1 to 0.45 wt. % C, 0.1 to 1 wt. % Si, 0.1 to 2 wt. % Mn, 0.04 wt. % or less P, 0.04 wt. % or less S, 0.1 to 1 wt. % Ti, 0.0015 to 0.01 wt. % N, and the balance being Fe and inevitable impurities, the steel including at least 400 TiC precipitates of 0.5 .mu.m or more in particle size per 1 mm.sup.2 and the steel having Ti* of 0.05 wt. % or more and less than 0.4 wt. % the Ti* being defined by the equations of Ti*=Ti(a)-[Ti], Ti(a)=Ti-{(48/14)N+(48/32)S}, log[Ti][C]=(-10580/T)+4.38, [Ti]=4.times.[C]+{Ti(a) -4.times.C}.
A method for producing an abrasion-resistant steel having excellent surface property comprising the steps of: preparing a molten steel having the composition specified above; casting continuously the molten steel to produce slab, coarse particles of TiC being precipitated in the slab; hot-working the slab to produce a hot-rolled steel sheet at 1300.degree. C. or less; and quenching the hot-rolled steel sheet.
REFERENCES:
patent: 5236521 (1993-08-01), Shikanai et al.
patent: 5284529 (1984-02-01), Shikanai et al.
Proceedings of an International Symposium of High-Strength of Low-alloy Steels, Oct. 1975, pp. 55-57, 67, 68, 155 and 156.
Hirabe Kenji
Kunisada Yasunobu
Sanpei Tetsuya
Shikanai Nobuo
Yako Kazunori
NKK Corporation
Yee Deborah
LandOfFree
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