Hot-stamped part and method of manufacturing the same
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.
Claims5
1-14. (canceled)
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 about 1,000° C. as the blank passes through the soaking sections;
- wherein the heating furnace includes heating sections and 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 is less than 0.45 ppm, and
- wherein a corrosion rate measured through a copper potential polarization test is less than or equal to 3 × 10-6 A.
Dependencies are inferred from the claim text.