一种高强塑性高碳钢及其制备方法
By designing and controlling the composition of high-carbon steel in a coordinated manner, and employing austenitization, rapid cooling, and specific tempering temperatures, a nanolayered structure with alternating ferrite lamellars and carbide nanosheets is formed. This solves the problem of reconciling strength and plasticity in high-carbon steel and achieves an excellent match between high strength and high plasticity.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- ZHONGBEI UNIV
- Filing Date
- 2026-05-11
- Publication Date
- 2026-07-17
AI Technical Summary
In existing high-carbon steel production processes, the limits of microstructure refinement and performance bottlenecks, the sensitivity of process control and performance fluctuations, the limitations of existing improvement technologies, and the inadequacy of martensitic tempering processes make it difficult to reconcile the strength and plasticity of high-carbon steel, and it is impossible to obtain a microstructure that combines nanoscale lamellar structure with excellent strength and plasticity.
Designed with high-carbon steel composition, the austenitization process involves rapid cooling to martensite followed by tempering at 320-380℃ to form a nanolayered structure consisting of alternating ferrite lamellae and carbide nanolamellae. By synergistic control of composition and process, the cooling rate is ensured to be ≥50℃/s, and the tempering temperature and time are within a specific window, enabling the directional self-assembly of carbides.
It breaks through the bottleneck of strong plasticity of traditional high carbon steel, and achieves an excellent match of tensile strength ≥1300MPa and reduction of area ≥50%, forming continuous and straight nanoscale lamellar carbides, which significantly improves plasticity while maintaining high strength.
Smart Images
Figure CN122168836B_ABST