Welding wire for aluminum-based or aluminum-silicon-based coated hot-stamped steel, and preparation method and use method therefor
By using welding wire with specific chemical composition, the problem of aluminum forming high-temperature δ-ferrite in laser welding of hot-stamped steel with aluminum-based or aluminum-silicon-based coatings has been solved, achieving high strength and high corrosion resistance of the weld, reducing costs and increasing yield.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- PANGANG GROUP RESEARCH INSTITUTE CO LTD
- Filing Date
- 2025-06-24
- Publication Date
- 2026-06-18
AI Technical Summary
In the laser welding process of existing aluminum-based or aluminum-silicon-based coated hot-stamped steel, aluminum elements are prone to forming high-temperature δ-ferrite, which leads to brittle fracture. In addition, the unreasonable composition of existing welding wires results in large differences in weld composition, high cost, and low yield.
Welding wires with specific chemical compositions, including elements such as C, Mn, Mo, Ni, Cr, Zr, Ti, and Nb, are used. By precisely controlling the element content, the formation of high-temperature δ-ferrite is avoided, and high-temperature precipitates are added to hinder grain boundary migration, ensuring ultra-fine weld microstructure and high-temperature oxidation resistance.
It achieves complete austenitization of the weld, improves weld strength and corrosion resistance, ensures maximum weld strength of over 2100MPa, reduces welding costs, and increases yield.
Smart Images
Figure CN2025102907_18062026_PF_FP_ABST