温压工艺对爪极用铁基软磁材料显微组织及磁性能的影响
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摘要
采用粉末冶金工艺制备爪极用铁基软磁材料,并用XRD、密度、SEM和磁性能测试等方法研究温压工艺对其显微组织和磁性能的影响。结果表明:在140℃、800 MPa的条件下对水雾化铁粉进行压制,密度可达7.31 g/cm~3,再经过1 250℃真空烧结后密度达到7.42 g/cm~3,饱和磁化强度为205.5 Am~2/kg,矫顽力为7.98 A/m。压坯表面形貌光滑,孔隙明显减少,基本上不存在大范围密集存在的连通型孔隙。
The iron-based soft magnetic material for claw pole was prepared by powder metallurgy process,and the effects of warm compaction process on its microstructure and magnetic properties were studied by XRD,density,SEM and magnetic properties tests. The results show that the water atomized iron powder compacted under the condition of 140 ℃,800 MPa has the highest green density of 7.31 g/cm~3 and the highest sintered density of7.42 g/cm~3 after 1 250 ℃ sintering in vacuum. The sintered sample has the saturation magnetization of 205.5 Am~2/kg and the coercivity of 7.98 A/m. The warm-compacted sample surface is smooth and the porosity is obviously reduced,there is no obvious large-scale connected porosity.
The iron-based soft magnetic material for claw pole was prepared by powder metallurgy process,and the effects of warm compaction process on its microstructure and magnetic properties were studied by XRD,density,SEM and magnetic properties tests. The results show that the water atomized iron powder compacted under the condition of 140 ℃,800 MPa has the highest green density of 7.31 g/cm~3 and the highest sintered density of7.42 g/cm~3 after 1 250 ℃ sintering in vacuum. The sintered sample has the saturation magnetization of 205.5 Am~2/kg and the coercivity of 7.98 A/m. The warm-compacted sample surface is smooth and the porosity is obviously reduced,there is no obvious large-scale connected porosity.
引文
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[3] CHENG Y,ZHAO S,ZHANG J. A single stage hot forging process and die set of alternator poles[J]. International Journal of Material Forming,2013,6(4):511.
[4]周小文,邹科,朱代漫,等. FeSiAl抗电磁干扰柔性软磁薄膜的研究[J].金属功能材料,2018,25(5):13.
[5]陈正阳.成分与组织对爪极用钢磁性能影响的研究[D].锦州:辽宁工业大学,2015.
[6]张阳军,陈英.金属材料增材制造技术的应用研究进展[J].粉末冶金工业,2018,28(1):63.
[7]刘春荣,刘胜林,张唯玮,等. SPS技术在粉末冶金材料中的应用现状[J].粉末冶金工业,2017,27(6):52.
[8]王建中,汤慧萍,曲选辉,等.高密度粉末冶金零件制备技术现状[J].粉末冶金工业,2014,24(3):57.
[9]田建军,崔建民,袁勇,等.磷化工艺制备绝缘软磁粉末及其频率特性研究[J].粉末冶金工业,2010,20(5):23.
[10]贾立颖,朱代漫,胡国辉,等. SrFe12O19/α-Fe纳米复合双层膜的微磁学模拟[J].金属功能材料,2017,24(5):22.