Fe-Si Alloy Sheets via Large-Strain Extrusion Machining
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for producing Fe—Si sheets are limited by the inability to achieve high silicon compositions beyond 3.5 wt. % due to brittleness and increased cracking during rolling, restricting their cost-effective manufacturing and magnetic property enhancement.
Innovation Solution
A large-strain extrusion machining process that deforms solid Fe—Si alloys with a cutting tool in a single step, producing continuous sheets with controlled crystallographic textures and microstructures, allowing for higher silicon compositions and improved magnetic properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional rolling processes are used to produce Fe-Si sheets, then manufacturing capability is maintained, but silicon composition is limited to below 3.5 wt.% due to brittleness and cracking
Solution Approach 1:
The patent changes the processing parameters by replacing conventional rolling with large-strain extrusion machining, enabling the production of Fe-Si sheets with silicon compositions up to 6.5 wt.% that would otherwise be too brittle for rolling processes
Solution Approach 2:
The patent substitutes the conventional rolling mechanical system with a large-strain extrusion machining system, which uses a cutting tool to deform and extrude the material in a single step, avoiding the repeated rolling operations that cause cracking in high-silicon alloys
2Reliability
If higher silicon compositions are used to enhance magnetic properties, then electrical and magnetic performance improves, but workability and manufacturability deteriorate
Solution Approach 1:
The patent replaces the conventional rolling process with large-strain extrusion machining, which maintains excellent workability even at high silicon compositions (up to 6.5 wt.%) by deforming the material in a single continuous operation rather than through multiple rolling passes
Solution Approach 2:
The patent changes the manufacturing approach from incremental rolling to single-step extrusion machining, allowing higher silicon content to be processed effectively while maintaining ease of manufacture
3Manufacturing precision
If multi-step hot and cold rolling is used to control microstructure, then processing capability is maintained, but production efficiency decreases
Solution Approach 1:
The patent merges multiple rolling operations (hot rolling, cold rolling, annealing) into a single large-strain extrusion machining operation, achieving microstructure control and crystallographic texture development in one continuous step, thereby significantly improving production efficiency
Solution Approach 2:
The patent implements continuous extrusion machining that produces sheets in a single uninterrupted operation, eliminating the intermittent steps of conventional multi-step rolling and annealing processes, thus maintaining continuous productive action
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
Enables the efficient production of Fe—Si sheets with enhanced electrical and magnetic properties by retaining deformation textures upon recrystallization, overcoming the limitations of conventional rolling processes.
Implementation Method 1
deforming a solid body formed of an Fe—Si alloy with a cutting tool in a single step to continuously produce a continuous bulk form
Implementation Method 2
retaining deformation textures upon recrystallization
Data Source
AI summary
Processes for producing continuous bulk forms of iron-silicon alloys and bulk forms produced thereby. Such a bulk form is continuous in a longitudinal direction thereof and has a continuous cross-sectional form transverse to the longitudinal direction. The bulk form is formed of an Fe—Si alloy and has a crystallographic texture that comprises <111> and {110} fibers that are inclined relative to the longitudinal direction. The bulk form may be produced by a process that includes deforming a solid body formed of an Fe—Si alloy with a cutting tool in a single step to continuously produce a continuous bulk form from material obtained from the solid body.