Metal treatment – Process of modifying or maintaining internal physical... – Heating or cooling of solid metal
Patent
1997-05-01
1999-01-26
Yee, Deborah
Metal treatment
Process of modifying or maintaining internal physical...
Heating or cooling of solid metal
148654, C21D 802
Patent
active
058633618
ABSTRACT:
A method is provided for Steckel mill rolling and finishing flat rolled steel having uniform mechanical properties, good surface quality, and ease of flattening whether in coil form or discrete sheet or plate by hot rolling a heated transfer bar in a Steckel mill and reverse rolling and optional coiling to achieve finished flat rolled product of a selected thickness and selected austenite finishing temperature. The finished product is water cooled to a ferrite transformation temperature and thereafter air cooled until transformation from austenite to ferrite is at least 70% completed. The product may be further water cooled to a temperature below the ferrite transformation temperature.
REFERENCES:
patent: 4898629 (1990-02-01), Lang et al.
Lin et al., "Effects of Run-Out Table Cooling Profile on the Mechanical Properties of C-Mn and C-Mn-Nb-V Steels," 37th MWSP Conf. Proc., ISS, vol. XXXIII, 1996, pp. 79-88.
Nelson et al., "The Effect of Runout Table Cooling Trajectories on the Properties of Low-C, Medium-C and HSLA Steels," 34th MWSP Conf. Proc., ISS-AIME, vol. XXX, 1993, pp. 53-60.
Takawa et al., "Mathematical Model and Control System of Cooling Process," The Sumitomo Search No. 34, May 1986, pp. 79-87.
Kunishige et al., "Microstructures and Mechanical Properties of High Strength Steel Sheets Taking Full Advantage of Thermomechanical Treatment on Hot Strip Mills," The Sumitomo Search No. 31, Nov. 1985, pp. 53-62.
Fukagawa et al., "Mechanism of Red Scale Defect Formation in Si-added Hot-rolled Steel Sheets," ISIJ 1994, pp. 906-911.
Okada et al., "Prevention of Red Scale Formation during Hot Rolling of Steels," ISIJ 1995, pp. 886-891.
Pennock Corporation
Yee Deborah
LandOfFree
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