一种含有NbVTiMo复合析出相的2GPa级抗氢脆热成形钢及其制备方法与应用
By using NbVTiMo quaternary microalloying and precise heat treatment processes, a composite nano-precipitate phase with high thermal stability and interfacial bonding is formed, which solves the problem of insufficient hydrogen embrittlement resistance of hot-formed steel and achieves simultaneous improvement of ultra-high strength and good forming toughness.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- UNIV OF SCI & TECH BEIJING
- Filing Date
- 2026-04-27
- Publication Date
- 2026-07-17
AI Technical Summary
Existing hot-formed steels are prone to absorbing hydrogen during service, which can lead to hydrogen-induced cracking and delayed fracture. Existing microalloyed composite precipitates have poor thermal stability and dispersion, and cannot effectively suppress hydrogen enrichment at grain boundaries and defects, thus limiting the improvement of hydrogen embrittlement resistance.
A composite nano-precipitate phase is formed by using NbVTiMo quaternary microalloying. By precisely controlling its size and distribution, combined with a heat treatment process that extends the holding time at the winding temperature and shortens the holding time at the austenitization temperature, a hydrogen trap with high thermal stability and interfacial bonding is formed, thereby enhancing the ability to capture hydrogen atoms.
It achieves simultaneous optimization of the hydrogen embrittlement resistance and toughness of hot-formed steel, improves the ultra-high strength and forming toughness of steel, reduces the risk of hydrogen-induced cracking and delayed fracture, and meets the service requirements of high-end automotive safety components.
Smart Images
Figure CN122081795B_ABST