Production method for reducing edge cracks of high-magnetic-induction oriented silicon steel
By performing a series of treatments on hot-rolled steel coils, including regular treatment, cold rolling, decarbonization annealing, nitriding treatment, extrusion and high-temperature annealing, a refined edge structure is formed, and the problem of edge cracking of high-magnetic inductance orientation silicon steel during high-temperature annealing is solved, and the goal of efficient production and high-quality products is achieved.
CN119640013AActive Publication Date: 2025-03-18HUNAN VALIN LIANYUAN IRON & STEEL CO LTD +1
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Patent Information
- Application Number
- CN202411872523.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-18
- Publication Date
- 2025-03-18
- Estimated Expiration
- 2044-12-18
AI Technical Summary
Technical Problem
High magnetic inductance oriented silicon steel is prone to edge cracking during high-temperature annealing, resulting in low production efficiency, poor product quality and magnetic level.
Method used
By performing regular treatment of hot-rolled steel coils, cold rolling, decarburizing annealing, nitriding, extrusion, magnesium oxide coating and high-temperature annealing, a refined edge structure is formed to reduce the occurrence of edge cracks.
Benefits of technology
It effectively reduces the incidence of cracks in the steel curling part after high-temperature annealing, improves production efficiency and product quality, and reduces production costs.
✦ Generated by Eureka AI based on patent content.
Abstract
The invention discloses a production method for reducing edge cracks of high-magnetic-induction oriented silicon steel, and relates to the technical field of oriented silicon steel production and manufacturing, and the production method comprises the following steps: S1, carrying out normalizing treatment, acid pickling and cold rolling on a hot rolled steel coil to obtain a cold-rolled steel plate; s2, carrying out decarburization annealing and nitriding treatment on the cold-rolled steel sheet, extruding the cold-rolled steel sheet, coating a magnesium oxide coating, and carrying out high-temperature annealing to obtain an annealed steel coil; and S3, the annealed steel coil is subjected to stretching flattening annealing and laser nicking treatment, and the high-magnetic-induction oriented silicon steel is obtained. According to the production method disclosed by the invention, the cracking occurrence rate of the edge part of the steel coil after high-temperature annealing is greatly reduced through a low-cost production method.
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