Batch-annealed dual-phase steel

Details Batch-annealed dual-phase steel Batch-annealed dual-phase steel

1981-10-19

1984-03-20

Skiff, Peter K.

Metal treatment

Compositions

Heat treating

148 36, 148134, C21D 810

Patent

active

044379021

ABSTRACT:
Dual-phase steel, consisting essentially of a ferrite matrix containing islands of martensite, is produced by batch annealing of hot or cold rolled steel having carbon below 0.2% and manganese below 2% and at least critical contents of copper (0.4%) and nickel (0.6%), with heat to the alpha plus gamma region, followed by slow cooling. This procedure is effective and controllable, and yields a dual-phase steel product that has high tensile strength with excellent elongation properties and that develops good yield strength upon moderate deformation.

REFERENCES:
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patent: 3830669 (1974-08-01), Matsuoka et al.
patent: 4047979 (1977-09-01), Grange et al.
patent: 4067754 (1978-01-01), Elias et al.
patent: 4410369 (1983-10-01), Waid et al.
W. S. Owen, "Can a Simple Heat Treatment Help Save Detroit?" (FIfth Harold Moore Lecture), Metals Technology, Jan. 1980, pp. 1-13.
T. Matsuoka et al., "Metallurgical Aspects in Cold Rolled High Strength Steels", Metallurgical Transactions, vol. 6A, Aug. 1975, pp. 1613-1622.
Bigsbee et al., "Structure-Processing and Structure-Property Relationships in Commercially Processed Dual-Phase Steels", Structure and Property of Dual-Phase Steels, AIME, 1979, pp. 304-306.
Crawley et al., "Processing, Properties and Modelling of Experimental Batch-Annealed Dual-Phase Steels", Fundamentals of Dual-Phase Steels, AIME, 1981, pp. 181-197.

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