Fe-Based Amorphous Alloy Strip Composition for Uniform Rapid Cooling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Amorphous alloys with high saturation magnetic induction face issues of non-uniform cooling, leading to warping, performance instability, and poor thermal stability due to high cooling intensity disparities, which are exacerbated by high Fe content, making industrial production challenging.
Innovation Solution
Regulating the composition of FeSiBC amorphous alloys with specific atomic percentages (80.4% ≤ a ≤ 83.5%, 3.98% ≤ b ≤ 9.5%, 9.58% ≤ c ≤ 12.0%, 0.1% ≤ d ≤ 1.3%) and optimizing the single-roller rapid quenching process with controlled cooling water flow and roller velocity to achieve uniform cooling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If high Fe content alloy systems are used to achieve high saturation magnetic induction, then saturation magnetic induction is improved, but glass-forming ability deteriorates and requires high cooling rates
Solution Approach 1:
The patent changes the chemical composition parameters by precisely controlling Fe, Si, B, and C content within specific ranges. This composition optimization enables the alloy to achieve high saturation magnetic induction while maintaining adequate glass-forming ability, reducing the required cooling rate from extreme values to industrially feasible ranges.
Solution Approach 2:
The patent creates a composite alloy system Fe-Si-B-C that combines multiple elements with complementary functions. Fe provides magnetic properties, Si enhances glass-forming ability, B refines structure, and C controls crystallization. This composite approach allows simultaneous achievement of high saturation magnetic induction and improved glass-forming ability.
2Stability of the object's composition
If high cooling rates are applied to prepare fully amorphous quenched alloy strips, then amorphous structure is achieved, but internal stress is frozen and warping occurs
Solution Approach 1:
The patent optimizes cooling rate parameters within a specific range (10^5-10^6 K/s) rather than using extreme high cooling rates. Combined with composition optimization, this moderate cooling approach enables formation of amorphous structure while reducing frozen internal stress and warping.
3Temperature
If high cooling intensity is used to achieve high saturation magnetic induction, then cooling uniformity deteriorates with temperature difference between center and sides, but this is necessary for high Fe content alloys
Solution Approach 1:
The patent optimizes multiple parameters including composition (Fe, Si, B, C ratios), cooling rate, and strip thickness to achieve a balanced cooling regime. The optimized composition and controlled cooling rate work together to reduce temperature gradients between center and sides, achieving cooling uniformity (δQ ≤ 4%) while maintaining high saturation magnetic induction.
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 solution results in an amorphous alloy strip with high saturation magnetic induction (≥ 1.6 T), excellent glass-forming ability, and uniform cooling (δQ ≤ 4%), ensuring superior soft magnetic properties and stability for downstream applications like transformers.
Implementation Method 1
the amorphous alloys are formed by changing the cooling rate of the molten metal so that its internal atoms are solidified into solid state before they can fully diffuse and rearrange
Implementation Method 2
its internal atoms retaining the disordered liquid-like state
Implementation Method 3
Cooling capacity differs between both sides of the molten pool and the center thereof in that cooling intensity on both sides of the molten pool is higher than that at the center of the molten pool
Implementation Method 4
both sides of the molten pool are affected by the 'laminar airflow'
Implementation Method 5
their poor glass-forming ability makes it necessary to rely on high cooling rates to prepare fully amorphous quenched alloy strips
Data Source
AI summary
The present application provides an iron-based amorphous alloy strip and a preparation method thereof. The iron-based amorphous alloy strip has a chemical composition of FeaSibBcCd, wherein a, b, c, and d represent atomic percentages of corresponding components respectively; 80.4% ≤ a ≤ 83.5%, 3.98% ≤ b ≤ 9.5%, 9.58% ≤ c ≤ 12.0%, 0.1% ≤ d ≤ 1.3%, and 99.9% ≤ a+b+c+d ≤ 100%, with the balance being inevitable impurities. The present application achieves uniform cooling even under high cooling intensity through the regulation of composition, thereby obtaining an iron-based amorphous alloy strip with high saturation magnetic induction, high glass-forming ability and cooling uniformity. The iron-based amorphous alloy strip exhibits superior soft magnetic properties, and the quality is ensured when it is applied to downstream products such as transformers.