Hot stamped compact
By controlling the grain size distribution and segregating specific elements at grain boundaries in high-strength steel materials, the issue of premature fracture is addressed, enabling the production of steel with high strength and resistance to early failure.
JP7737060B2Active Publication Date: 2025-09-10NIPPON STEEL CORPORATION
Patent Information
- Application Number
- JP2024511547
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- Priority Date
- 2022-03-31
- Filing Date
- 2023-03-02
- Publication Date
- 2025-09-10
- Estimated Expiration
- 2043-03-02
Smart Images
Figure 0007737060000001 
Figure 0007737060000002 
Figure 0007737060000003
Abstract
Provided is a hot-stamp-formed article having a specific chemical composition, the hot-stamp-formed article containing, by area ratio, 90% or more in total of at least one of martensite, bainite, and tempered martensite, and having a microstructure in which the standard deviation in a grain size distribution of prior-austenite grains is 5.0 μm or less and the total segregation level of at least one of Mo, W, Ta, Re, Os, Ir, and Tc at the prior-austenite grain boundaries is 0.10 atom% or higher.
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Citation Information
Patent Citations
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