Dual-phase hot-rolled steel strip

Details Dual-phase hot-rolled steel strip Dual-phase hot-rolled steel strip

C - Chemistry, Metallurgy

22

C

75/126, 148/34.4

C22C 38/12 (2006.01) C21D 8/02 (2006.01) C21D 9/52 (2006.01) C22C 38/18 (2006.01)

Patent

CA 1082950

Abstract of the Disclosure A dual-phase hot-rolled steel strip and method of making same which is characterized by a microstructure in the as-rolled condition of discrete islands of hard martensite dispersed through a substantially continuous matrix of soft polygonal ferrite ant containing as its essential alloying constituents, about 0.05% to about 0.11% carbon. about 0.6% to 1.8% manganese, about 0.7% to about 1.2% silicon, about 0.2% to about 0.4% molybdenum, about 0.3% to about 0.9% chro- mium, up to about 0.1% vanadium, and the balance consisting essentially of iron along with the usual impurities and re- siduals present in conventional amounts. The high strength low alloy steel is further characterized as having good initial formability properties and work hardening character- istics, rendering it eminently suitable for the fabrication of structural components for automobiles, such as bumpers, wheel components and the like.

288280

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