PRODUCTION OF HIGH STRENGTH HIGH DUCTILITY HIGH COPPER CARBON ALLOY THIN CAST STRIP

摘要

A high copper carbon alloy steel sheet made by preparing a molten melt producing an as-cast carbon alloy steel sheet Including, (i) by weight, between 0.15 and 0.50% carbon., less than 1,0% chromium, between 3.0 and 9.0% manganese, between 0.2 and 3.5% silicon, more than 0,5% copper, less than 0.01% aluminum, a total oxygen level of at least 50 or 100 ppm; (ii) nickel in levels below 0.5%; (ill) the remainder iron and impurities resulting from melting; solidifying and cooling the molten melt into a sheet less than 10 mm in thickness in a non-oxidizing atmosphere to below 1080 °C at a cooling rate between 1000 and 2000 °C/s, hot rolling the as- cast sheet to between 10 and 50% reduction to form a sheet with microstructure providing a tensile strength of at least 900 MFa and an elongation of at least 15%,