Fe-Si 전기강판 폐스크랩을 이용한 연자성 분말 및 테이프 제조기술

Manufacturing Technology for Tape Casting and Soft Magnetic Powder Using by Recycling Scrap of Fe-Si Electrical Sheet

This study focused on examining the possibility for recycling of Fe-Si electric sheet. We manufactured Fe-6.5Si mother alloy using by Fe-Si electric sheet scrap for transformer core materials. And then, soft magnetic alloy powder which diameter and shape were 45~150μm and sphere type was prepared by gas atomization process. As we compared to commercial Fe-6.5Si powder, its diameter distribution and microstructure of recycled powder was a similar. To investigate the possibility of reusing the soft magnetic composite sheet for electronics, recycled powder was treated to have a high aspect ratio (AR), and we finally obtained the 65~66 AR and 2.3μm thickness powder. To release the residual stress of powder, heat treatment was conducted under 300~400℃, N₂ gas. And then, soft magnetic sheet was made by tape casting process using by those powders. After the density and permeability of tape was measured, and we confirmed that the recycled Fe-Si electric sheet scrap was possible to reuse the soft magnetic materials of electronics.