Invar alloy precision strip and preparation method thereof
By optimizing the preparation process of Invar alloy, adopting the process flow of vacuum induction furnace smelting, vacuum electron beam cooling hearth furnace smelting slabs, surface grinding, hot rolling, annealing and pickling, cold rolling and bright annealing, combined with aluminum-magnesium composite deoxidation process, the purity and surface quality problems of Invar alloy precision strip were solved, and the production of high-quality Invar alloy precision strip was achieved.
Patent Information
- Application Number
- CN202310642999.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2023-06-01
- Publication Date
- 2025-09-16
- Estimated Expiration
- 2043-06-01
AI Technical Summary
The existing Invar alloy preparation method cannot meet the high requirements of the national electronic information industry for material cleanliness, strip shape and surface roughness.
The process flow includes vacuum induction furnace smelting, vacuum electron beam cooling hearth furnace smelting of slabs, surface grinding, hot rolling, annealing and pickling, cold rolling and bright annealing. Combined with the aluminum-magnesium composite deoxidation process, the deformation and temperature parameters of rough rolling and finishing rolling are optimized. Direct rolling is carried out in a flat crystallizer to control the aluminum and magnesium content in the molten steel, remove inclusions and improve the surface quality.
Invar alloy precision strips with high purity, low oxygen content, inclusion rating less than 0.5, flatness ≤ 0.1mm, and surface roughness Ra of 0.15-0.16μm are produced to meet the application requirements of the electronic information industry.