可变形永磁合金Cu_(80)Ni_(13)Fe_7的研究

Research on a ductile permanent magnet alloy Cu_(80)Ni_(13)Fe_7

研制了一种新成分的Cu80Ni13Fe7合金,其加工性能优于传统Cu60Ni20Fe20合金,并成功轧制成0·2mm厚的薄带.系统研究了回火温度与回火时间对该合金磁性能的影响.研究结果表明,CuNiFe合金只有经过适当的回火处理才能得到较好的磁学性能.在635℃回火1h后,矫顽力Hc可达到54·2kA·m-1,剩磁感应Br为0·19T,矩形比S为0·79.磁性测量表明,在635℃回火1h后样品平行于轧制方向和垂直于轧制方向的矫顽力Hc差别较大,而在其他回火条件下的差别都比较小.新研制的Cu80Ni13Fe7合金可作为磁栅尺的备选材料.

A new Cu80Ni13Fe7 alloy was obtained and rolled into thin tape with a thickness of 0.2 mm successfully. The machining property proved to be better than the conventional Cu60Ni20Fe20 alloy. The elfects of tempering temperature and time on the magnetic properties of the alloy were studied. Better magnetic property of the alloy could be got only under proper tempering condition. After tempered at 635 ℃ for 1 h, the coercivity He, the remnant induction Br and the squareness S of the alloy reached 54.2 kA·m^-1, 0.19 T and 0.79, respectively. Magnetic measurements showed that the difference of coercivity between parallel and perpendicular to the rolling direction for the alloy tempered at 635 ℃ for 1 h, is more significant than those under other tempering conditions. The results indicate that the alloy is a candidate for magnetic scales.