为生产高性能的电机铁芯,软磁复合材料(Soft Magnetic Composite,SMC)通常以高纯高压缩性铁粉为原料,如果能用较低纯度铁粉取代高纯铁粉,将使生产成本大大降低.本文以3种不同纯度铁粉为原材料,通过在不同工艺条件下压坯密度及表面显微硬度的变化,来表征铁粉纯度对压坯密实程度及加工硬化程度的影响.结果表明:铁粉纯度、杂质元素种类及含量、铁粉颗粒形貌均影响粉末压坯密度.较低纯度铁粉的压坯在500℃氮气中退火30 min,硬度迅速降低30%;而相同条件下高纯铁粉的压坯表面硬度基本不变.当热处理温度达到再结晶温度时,再结晶过程可使硬度降低近50%.
参考文献
| [1] | 吴安国 .铁粉芯,磁介质,粉芯,粘结软磁[J].磁性材料及器件,1999,30(06):55-56. |
| [2] | Persson M .The future belongs to soft materials[J].International Sinter News,2003,4:4-5. |
| [3] | Asaka K;Ishihara C .Technical trends in soft magnetic parts and materials[J].Hitachi Powdered Metals Technical Report,2005,4:3-9. |
| [4] | Soft magnetic PM materials show their strengths and uses[J].Metal Powder Report,1998(4):12-16. |
| [5] | Lefebvre L P;Gélinas C;Mongeon P E.Consolidation of a lubricated ferromagnetic powder mix for AC soft magnetic applications[A].Princeton,New Jersey,2002:86-97. |
| [6] | 黄允凯,朱建国,胡虔生.软磁复合材料在电机中的应用[J].微特电机,2006(11):1-3,8. |
| [7] | Gélinas C;Brydges D .Insulative iron powders for automative applcations[2003-01-0447,Sorel-Tracy,Quebec,Canada:Quebec Metal Powders Limited][R].,2003. |
| [8] | Gilbert I.;Bull S.;Evans T.;Jack A.;Stephenson D.;De Sa A. .Effects of processing upon the properties of soft magnetic composites for low loss applications[J].Journal of Materials Science,2004(2):457-461. |
| [9] | Shimada Y;Matsunuma K;Nishioka T et al.Development of a high-magnetic performance P/M soft magnetic material[J].Science & Technology Review,2003,56:46-53. |
| [10] | 张洁.金属热处理及检验[M].北京:化学工业出版社,2005 |
| [11] | Pennander Lars-Olova,Jack alanb.铁粉软磁复合材料开发及其在电机上的应用[J].金属功能材料,2002(03):19-25. |
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