Method of manufacturing a hot-stamped part
AssigneeHyundai Steel Company
InventorJe Youl Kong
Life of this patent
Estimating the term…
Abstract
A method of manufacturing a hot-stamped part includes: inserting a blank into a heating furnace including a plurality of sections with different temperature ranges; step heating the blank in multiple stages; and soaking the blank at a temperature of about Ac3 to about 1,000° C., wherein in the step of heating the blank, a temperature condition in the heating furnace satisfies the following equation: 0<(Tg−Ti)/Lt<0.025° C./mm, where Tg denotes a soaking temperature (° C.), Ti denotes an initial temperature (° C.) of the heating furnace, and Lt denotes a length (mm) of step heating sections.
Claims8
A method of manufacturing a part to be hot-stamped, the method comprising:
- 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;
- soaking the blank at a temperature of Ac3 to 1,000° C. as the blank passes through the soaking sections;
- transferring the soaked blank from the heating furnace to a press mold;
- forming a molded body by hot-stamping the transferred blank;
- and
- cooling the formed molded body, 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 the soaking is performed in the soaking sections having same temperature range in the heating furnace,
- wherein the blank includes a tailor welded blank (TWB) formed by cutting different types of plate materials having different thicknesses into a required shape and welding the cut plate materials to each other.
Dependencies are inferred from the claim text.