Hot stamped component and method of manufacturing thereof
By combining multi-stage heating and homogenization processes with XRD and EBSD analysis, the residual stress of hot-stamped parts was controlled, solving the fracture and springback problems of high-strength steel during processing and achieving high mechanical properties and improved hydrogen embrittlement.
CN122142154APending Publication Date: 2026-06-05HYUNDAE STEEL CO LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- HYUNDAE STEEL CO LTD
- Filing Date
- 2021-12-27
- Publication Date
- 2026-06-05
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Abstract
The present invention relates to a hot-stamped part comprising a steel sheet and an Al-Si-based plated layer formed on at least one surface of the steel sheet, wherein the steel sheet contains, in wt%, 0.19% to 0.38% of carbon, 0.5% to 2.0% of manganese, 0.001% to 0.005% of boron, more than 0 to 0.03% of phosphorus, more than 0 to 0.003% of sulfur, 0.1% to 0.6% of silicon, 0.05% to 0.6% of chromium, the balance of iron and other inevitable impurities, residual stress is present in the steel sheet of the hot-stamped part, and the product of the numerical value of the XRD value obtained by quantifying the residual stress by X-ray diffraction and the numerical value of the EBSD value obtained by quantifying the orientation by electron backscatter diffraction is 2.85*10 ‑4 degrees*MPa / µm 2 or more and 0.05 degrees*MPa / µm 2 or less.
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