This technology relates to a method for manufacturing high-density Fe-Si steel sheets using powder metallurgy, which can be applied to various electronic components such as electric vehicle drive motors. In particular, it is a technology designed to simultaneously enhance performance, durability, stability, and applicability based on the core materials, structures, processes, or device configurations related to the powder-based high-density Fe-Si steel sheet manufacturing method.
It aims to solve the problem of obtaining high-efficiency soft magnetic properties in high-Si content Fe-Si electrical steel sheets while maintaining ductility and ease of processing. Accordingly, this technology proposes a technical concept that implements the use of Fe-Si alloy powder with a Si content in the range of 15 to 25 wt% to improve sinterability and achieve high packing density. This concept involves applying a core means comprising mixing pure Fe metal powder with Fe-Si alloy powder, manufacturing compound powder, and manufacturing building panels through powder rolling, bonding sintering, cold rolling, and homogenization heat treatment.
Accordingly, the present invention is expected to improve the manufacturing process of Fe-Si steel sheets by increasing the Si content to 6.5 wt% and achieving high packing density through optimized powder composition and processing steps, while simultaneously enhancing reproducibility, scalability, and process suitability in actual usage environments. Furthermore, since it can be utilized as a high-performance material, device, battery, sensor, apparatus, or manufacturing process in related industries, it is advantageous in terms of subsequent commercialization and demonstration development.
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