Magnetic properties of melt quenched Ni–Fe alloy strips
Magnetic properties of melt quenched Ni–Fe alloy strips
复制标题
DOI：
10.1016/j.msea.2003.10.251
复制
发表时间：
2004-07
期刊：
影响因子：
6.4
通讯作者：
J. Namkung;M. Kim;C. G. Park
中科院分区：
文献类型：
--
作者：
J. Namkung;M. Kim;C. G. Park
研究了采用液态延铸工艺制备的高磁导率79 Ni-Fe合金薄带的显微组织和磁性能，探讨了显微组织对其软磁性能的影响。对熔体淬火和冷加工的合金带材进行热处理以控制显微组织。熔体淬火带的显微组织由从辊接触侧向自由空气侧倾斜的定向凝固晶粒组成。采用Al 2 O3涂层Cu-40 Zn铸轧辊，采用熔体拉铸工艺成功地制备了高导磁率79 Ni-Fe合金带材。铸带的表面粗糙度可以通过在熔体牵引铸造之后进行约30%的冷轧来控制。为提高79 Ni-Fe合金的磁性能，需要对79 Ni-Fe合金进行30%以上的冷轧和1200°C × 1h的热处理。热处理后79 Ni-Fe带材获得足够磁性能所需的冷却速度低于5°C/s。研究结果表明，采用液态拉铸工艺可以获得良好的79 Ni-Fe合金带材成形性，铸轧后采用冷轧和热处理相结合的方法可以提高79 Ni-Fe合金的软磁性能。
The microstructure and magnetic properties of high permeability induction 79Ni–Fe alloy strips prepared by the melt drag casting process have been investigated to elucidate the effect of microstructure on their soft magnetic properties. The melt quenched and cold worked alloy strips were heat treated to control the microstructure. The microstructure of the melt quenched strip consist of directionally solidified grains that are inclined from the roll-contact side to the free-air side. A high permeability alloy, 79Ni–Fe alloy strip was well formed by the melt drag cast process using an alumina coated Cu–40Zn cast roll. The surface roughness of the cast strip can be controlled by about 30% cold rolling after the melt drag casting. Melt drag cast 79Ni–Fe alloy strip requires subsequent cold rolling of more than 30% and heat treatment at 1200°C for 1h for improving its magnetic property. The required cooling rate for adequate magnetic properties of 79Ni–Fe strips after heat treatment is below 5°C/s. The present research demonstrated that 79Ni–Fe alloy strip was well formed by the melt drag cast process and the soft magnetic properties of the melt quenched strips could be improved by a combination of cold rolling and heat treatments with cold rolling after completion of the casting process.