Patent ID: 8257516

Claim:
A method of manufacturing an ultra-high strength steel product, comprising: a) preparing a steel sheet by blanking the steel sheet having hardenability to cut the steel sheet; b) cold-pressing the steel sheet to produce a cold-formed product having a shape with only between about 50-80% of the dimensional accuracy of a final product; c) trimming the cold-formed product of step (b) along a contour line corresponding to an outer contour of the final product; d) hot-pressing the trimmed product of step (c) for forming the remaining 20-50% shape of the final product and quenching simultaneous with hot-pressing, after heating the trimmed product to an austenite region of 700° C. or more; and e) product-finishing by carrying out final trimming and punching of the hot-formed product using a laser beam or water-jet.