Hot-stamped component having high cold-bending performance and high strength, and manufacturing method therefor

Abstract

Disclosed in the present invention are a hot-stamped component having high cold-bending performance and high strength, and a manufacturing method therefor. The method comprises: (1) manufacturing a steel plate for hot stamping; (2) preprocessing a component; (3) heat treatment, transfer and stamping of the component: placing a semi-finished product of the component into a heat treatment furnace, controlling a heat treatment temperature to be 750° C.-960° C., and controlling the total time of heat treatment to be 1.5-10 min and the time for the heat treatment temperature above 880° C. not to be less than 1.2 min; transferring the heat-treated semi-finished product into a mold for mold-closed stamping, and the temperature of the semi-finished product when leaving the heat treatment furnace not being lower than 900° C.; when the thickness of the steel plate forming the component is less than or equal to 1.5 mm, controlling transfer time to be 11 s-20 s, and when the thickness of the steel plate forming the component is greater than 1.5 mm, controlling the transfer time to be 13 s-25 s; and (4) stamping posttreatment: performing thermal insulation homogenization on the component, then performing machining to obtain a finished product. Accordingly, a component having a product of strength and elongation of ≥10 GPa·%, a cold-bending angle of ≥60 degrees, and a three-point bending maximum load of ≥13 KN can be prepared by using the method.

Dependencies are inferred from the claim text.