Electrical Steel Sheet Adhesive Coating for High-Temperature Bonding
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for manufacturing electrical steel sheet products face challenges in achieving strong adhesive strength between sheets, particularly at high temperatures, while maintaining excellent surface properties and processing properties such as corrosion resistance and weldability.
Innovation Solution
A method involving the preparation of an adhesive coating composition containing an organic/inorganic complex with an organic resin and inorganic nanoparticles, applied to the surface of electrical steel sheets, followed by heat fusion and controlled cooling to enhance adhesive strength and surface properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an inorganic coating solution is used, then heat resistance and weldability are improved, but punchability deteriorates due to high hardness
Solution Approach 1:
The patent applies composite materials by combining inorganic coating solutions with organic coating solutions in a layered structure. The inorganic coating layer provides heat resistance and weldability, while the organic coating layer provides punchability and adhesion. This composite approach resolves the contradiction by integrating the advantageous properties of both material types without the disadvantages of either alone.
Solution Approach 2:
The patent segments the coating into multiple layers with distinct functions: an inorganic coating layer for heat resistance and weldability, and an organic coating layer for punchability and adhesion. This segmentation allows each layer to optimize for its specific function, resolving the contradiction between heat resistance and punchability.
2Ease of manufacture
If an organic coating solution is used, then punchability is improved, but adhesion after stress relief annealing deteriorates
Solution Approach 1:
The patent uses composite materials where the inorganic coating layer provides adhesion and heat resistance, while the organic coating layer provides punchability. The inorganic layer acts as a bonding layer that maintains adhesion even after stress relief annealing, while the organic layer ensures good punchability during manufacturing.
Solution Approach 2:
The coating is segmented into an inorganic layer for adhesion and heat resistance, and an organic layer for punchability. This segmentation allows the inorganic layer to maintain strong adhesion after SRA while the organic layer provides the necessary punchability, resolving the contradiction between these two properties.
3Reliability
If an organic coating film is used, then adhesion is improved, but weldability deteriorates due to gas generation during welding
Solution Approach 1:
The patent segments the coating into an inorganic layer that provides adhesion and heat resistance without gas generation during welding, and an organic layer that provides additional adhesion. The inorganic layer acts as a barrier that prevents the organic layer from decomposing and generating harmful gases during welding, while still maintaining good adhesion properties.
4Strength
If the adhesive coating layer is heated at high temperature, then adhesive strength is improved, but surface properties such as corrosion resistance and weldability deteriorate
Solution Approach 1:
The patent segments the coating into an inorganic layer that provides heat resistance and surface properties, and an organic layer that provides adhesive strength. The inorganic layer acts as a protective barrier that prevents excessive heat from degrading surface properties like corrosion resistance and weldability, while the organic layer provides the necessary adhesive strength through controlled bonding.
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 achieves excellent room temperature and high-temperature adhesive strength, high-temperature oil resistance, and improved surface properties such as corrosion resistance and weldability, effectively addressing the limitations of existing technologies.
Implementation Method 1
forming an adhesive coating layer by applying and then curing the adhesive coating composition onto a surface of an electrical steel sheet
Implementation Method 2
forming a heat-fused layer by laminating and heat-fusing a plurality of electrical steel sheets on which the adhesive coating layers are formed
Implementation Method 3
cooling the heat-fused electrical steel sheets at a cooling rate of 0.05 to 20° C./min
Data Source
AI summary
A method for manufacturing an electrical steel sheet product according to an exemplary embodiment of the present invention includes: preparing an adhesive coating composition; forming an adhesive coating layer by applying and then curing the adhesive coating composition onto a surface of an electrical steel sheet; forming a heat-fused layer by laminating and heat-fusing a plurality of electrical steel sheets on which the adhesive coating layers are formed; and cooling the heat-fused electrical steel sheets at a cooling rate of 0.05 to 20° C./min.