High strength steel plate type high reason of yield, cold rolled steel plate of high strength type high reason of income.Galvanized steel sheet of high strength type high reason of income, hot galvanized steel sheet of high strength type high reason of income.Hot galvanized steel sheet and high strength recozida type high reason of income.Method for the production of cold rolled steel plate of high strength type high reason of income.Method for the production of hot galvanized steel sheet of high strength type high reason of income.And method for the production of hot galvanized steel sheet and high strength recozida type high reason of income

摘要

High strength steel plate type high reason of yield, cold rolled steel plate of high strength type high reason of income.Galvanized steel sheet of high strength type high reason of income, hot galvanized steel sheet of high strength type high reason of income.Hot galvanized steel sheet and high strength recozida type high reason of income.Method for the production of cold rolled steel plate of high strength type high reason of income.Method for the production of hot galvanized steel sheet of high strength type high reason of income.And method for the production of hot galvanized steel sheet and high strength recozida type high reason of income.The present invention relates to a steel plate of high strength type high reason of income contains as components, in% by weight, 0.03% to 0.20% C, 1.0% or less of you.More than 1.5% to 3.0% Mn, 0.10% or less P, 0.05% or less s, 0, 10% or less of Al, 10% or less of N, one or more kinds of elements selected from among Ti, Nb.And V whose total is in the range of 0.010% to 1000%, and the balance being done with Fe and inevitable impurity, and a structure containing ferrite and a second phase as a microstructure.The ferrite having a ratio of the area of 50% or more and an average grain tamanhho lens 18 196 m or less.The second phase containing the martensita whose reason of area is in the range of 1% to less than 7%.The thickness of a structure type band formed by the second stage satisfies a predetermined relationship expression.