Amorphous Alloy Strip Flatness Through Transverse Temperature Control
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Solution Overview
Problem
Amorphous nanocrystalline alloy strips manufactured by planar flow technology often have surface roughness issues, leading to uneven cutting and poor winding quality, which affects the lamination factor and processing costs of iron cores.
Innovation Solution
Control the transverse temperature non-uniformity of the molten steel and surface temperature non-uniformity of the cooling roller during the manufacturing process by blowing a flame or high-temperature gas to specific regions, ensuring the amorphous nanocrystalline alloy strip has improved surface flatness with a relative length difference of less than 0.50% when cut into narrow strips.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If planar flow technology is used to manufacture amorphous nanocrystalline alloy strip, then production efficiency and material properties are improved, but surface roughness increases leading to poor flatness
Solution Approach 1:
The patent applies parameter changes by controlling the transverse temperature distribution of the cooling roller (maintaining temperature difference within 40°C) and adjusting cooling parameters to achieve uniform cooling across the strip width. This resolves the contradiction by modifying thermal parameters during manufacturing to produce flat strips with good surface quality while maintaining high-speed continuous production capabilities of planar flow technology
Solution Approach 2:
The patent implements local quality by applying differential cooling to different regions of the molten steel band. The cooling roller is designed with variable cooling intensity across its width, with stronger cooling at edges and moderate cooling at the center, creating a controlled transverse temperature distribution that prevents edge warping and ensures uniform flatness throughout the strip
2Manufacturing precision
If subsequent treatment is applied to eliminate surface roughness, then surface flatness is improved, but processing procedures and costs increase
Solution Approach 1:
The patent applies preliminary action by ensuring optimal surface flatness is achieved during the primary manufacturing process itself, through controlled transverse temperature distribution and cooling parameters. This eliminates the need for subsequent flatness correction treatments such as annealing or mechanical flattening, thereby reducing processing procedures and costs while maintaining high surface quality
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method results in an amorphous nanocrystalline alloy strip with enhanced surface flatness, reducing processing costs and improving the quality of iron cores by maintaining a high lamination factor and minimizing surface fluctuations.
Implementation Method 1
enabling the molten steel to flow out of the nozzle and spread on an outer circumferential surface of a cooling roller that rotates at a high speed below the nozzle, and forming a melting pool containing the molten steel between a surface of the cooling roller and a bottom surface of the nozzle; rapidly pulling out and cooling the molten steel
Data Source
AI summary
Disclosed is an amorphous nanocrystalline alloy strip. When the amorphous nanocrystalline alloy strip is cut into a plurality of narrow strips having a same width of less than or equal to 10 mm, a relative length difference among the plurality of narrow strips is not greater than 0.50%. Further disclosed is a method for manufacturing the amorphous nanocrystalline alloy strip. The amorphous nanocrystalline alloy strip has good surface flatness. The transverse temperature non-uniformity of molten steel inside a melting pool and the surface temperature non-uniformity of a cooling roller within a strip manufacturing position range are controlled in a process of manufacturing the amorphous nanocrystalline alloy strip, so that the surface flatness of the manufactured strip is improved. The manufacturing process is simple and convenient.