STABILIZER STEEL HAVING HIGH STRENGTH AND EXCELLENT CORROSION RESISTANCE, VEHICLE STABILIZER EMPLOYING SAME, AND METHOD FOR MANUFACTURING SAME

摘要

In accordance with the present invention, steel having a prescribed component composition, in particular, one in which the total amount of Cu + Ni is at least 15 mass%, with the remainder being Fe and unavoidable impurities, is brought to a crystal grain size, measured subsequent to being shaped to stabilizer shape and quenched, such that the prior austenitic grain size number is in the range of 7.5-10.5, whereby a high-durability stabilizer steel having tensile strength of 1,200 MPa grade or above, and excellent normal temperature/low temperature ductility, can be obtained at lower cost, through an environmentally-friendly manufacturing process.