Patent ID: 8956470
Filing Date: 2015-02-17
Classification: C21D,C22C

Abstract:
1. Steel comprising between 90% and 50% bainite, the rest being austenite, in which excess carbon remains within the bainitic ferrite at a concentration beyond that consistent with equilibrium; there is also partial partitioning of carbon into the residual austenite with bainite platelets thickness 100 nm or less and by weight percent: carbon 0.6% to 1.1% , manganese 0.5 to 1.8% , nickel up to 3% , chromium 0.5% to 1.5% , molybdenum 0% to 0.5%, vanadium 0% to 0.2% , silicon about 0.5% to about 2% and the balance iron save for incidental impurities.