Patent ID: 6299710
Filing Date: 2001-10-09
Classification: C21D,C22C

Abstract:
A method of producing a bainite steel product comprising the steps of providing a slab having a composition comprising at least about 0.001% and less than about 0.030% by weight C, no more than about 0.60% by weight Si, from about 0.8 to 3.0% by weight Mn, from about 0.005 to 0.20% by weight Nb, from about 0.0003 to 0.0050% by weight B, and no more than about 0.005% by weight Al, with the remainder being Fe and incidental impurities, heating the slab to a temperature of from Ac.sub.3 to 1350.degree. C., finishing hot rolling at a temperature higher than 800.degree. C., and air-cooling or acceleration cooling the hot-rolled product.