Wire rod, steel wire and manufacturing methods therefor
By forming BN compounds through boron addition to suppress nitrogen's solid solution strengthening effect, the method reduces wire strength and manufacturing costs, making it suitable for reinforcing bars and scaffolding steel plates.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- POHANG IRON & STEEL CO LTD
- Filing Date
- 2025-12-17
- Publication Date
- 2026-06-25
AI Technical Summary
Existing methods for manufacturing binding wire result in high strength due to nitrogen solid solution strengthening, leading to increased costs and reduced price competitiveness, and the use of alloying elements like Ti to precipitate TiC and Ti(C,N) further complicates the process.
The addition of boron (B) to form BN compounds to remove nitrogen from the ferrite phase, suppressing the solid solution strengthening effect and reducing wire strength, thereby eliminating the need for expensive alloying elements.
The method achieves ultra-low carbon steel wire rods and steel wires with tensile strength of 280 MPa or less, suitable for applications like reinforcing bars and scaffolding steel plates, while maintaining cost-effectiveness by avoiding the use of costly alloying elements.
Smart Images
Figure KR2025021959_25062026_PF_FP_ABST