Hot-stamped part
AssigneeHyundai Steel Company
InventorJe Youl Kong
Life of this patent
Estimating the term…
Abstract
A hot-stamped part is manufactured from a blank using a manufacturing method that includes inserting a blank into a heating furnace. The heating furnace includes heating sections and soaking sections. The blank passes through the heating sections, and through the soaking sections at a temperature of Ac3 to 1,000° C. In the step of heating the blank, a temperature condition in the heating furnace satisfies formula 0<(Tg−Ti)/Lt<0.025° C./mm, wherein Tg denotes a soaking temperature (° C.), Ti denotes an initial temperature (° C.) of the heating furnace, and Lt denotes a length (mm) of the heating sections. An amount of diffusion hydrogen of the hot-stamped part is less than 0.45 ppm and a corrosion rate of the hot-stamped part measured through a copper potential polarization test is less than or equal to 3×10−6 A.
Claims4
A hot-stamped part manufactured by a manufacturing method
- wherein the manufacturing method comprises inserting a blank into a heating furnace, wherein the heating furnace includes heating sections and soaking sections, step heating the blank as the blank passes through the heating sections, and soaking the blank at a temperature of Ac3 to 1,000° C. as the blank passes through the soaking sections;
- wherein, in the step heating of the blank, a temperature condition in the heating furnace satisfies formula:
- 0<(Tg−Ti)/Lt<0.025° C./mm
- wherein Tg denotes a soaking temperature (° C.), Ti denotes an initial temperature (° C.) of the heating furnace, and Lt denotes a total length (mm) of the heating sections,
- wherein an amount of diffusion hydrogen of the hot-stamped part is less than 0.45 ppm, and
- wherein a corrosion rate of the hot-stamped part measured through a copper potential polarization test is less than or equal to 3×10−6 A.
Dependencies are inferred from the claim text.